aniline — label CAS 62-53-3

aniline

IARC Group 2A — Probably carcinogenic to humans
CAS: 62-53-3 | IARC source

2,99 €

Chemical reagent Anilina (CAS 62-53-3). Full encyclopedic card — classification, properties and safety data — below.

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REACH 2020/878
v1 · 18.07.2026
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3D model Aniline, CAS 62-53-3, molecular formula C6H7N, molar mass 93.13 g/mol
Chemical Overview: AnilineMolGod_OVERVIEW_1
Molecular formulaC6H7N
Molecular weight93.13 g/mol
Melting point-6.3 °C
Boiling point184.1 °C
Density1.0217 g/cm³
LogP (lipophilicity)0.9
pKa4.6
IUPAC nameaniline
SMILESC1=CC=C(C=C1)N
InChIKeyPAYRUJLWNCNPSJ-UHFFFAOYSA-N

Synonyms: ANILINE · Benzenamine · Phenylamine · 62-53-3 · Aminobenzene

Data sources: PubChem (NLM/NIH), CRC Handbook 105th ed. (Haynes 2024)
Last updated: 2026-11-10

SCIENTIFIC RESEARCH

[1]Europe PMC2026
Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.
et al.. (2026). "Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.". https://doi.org/10.3390/ma19101993
Go to full study ↗
[2]Europe PMC2026
Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.
et al.. (2026). "Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.". https://doi.org/10.1186/
Go to full study ↗
[3]Europe PMC2026
Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil…
et al.. (2026). "Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil Niche Information from Contaminated Sites.". https://doi
Go to full study ↗
[4]Europe PMC2026
Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.
et al.. (2026). "Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.". https://doi.org/10.3390/nano16030165
Go to full study ↗
[5]Europe PMC2026
Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.
(2026). "Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.". https://doi.org/10.1021/acsomega.5c06688
Go to full study ↗
[6]Europe PMC2025
Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC…
et al.. (2025). "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853.". https://doi.org/10.1038/s415
Go to full study ↗
[7]Europe PMC2025
Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.
et al.. (2025). "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.". https://doi.org/10.1039/d5ra03828f
Go to full study ↗
[8]Europe PMC2025
Integrated Physiological, Transcriptomic and Metabolomic Analyses of the Response of Rice to Aniline Toxicity.
et al.. (2025). "Integrated Physiological, Transcriptomic and Metabolomic Analyses of the Response of Rice to Aniline Toxicity.". https://doi.org/10.3390/ijms26020582
Go to full study ↗
📚 Scientific references (Chicago Author-Date) 20 refs · 3 baz

MOLEKUŁA Per-CAS bibliography (live from 13+ databases)

Sources: db:Europe PMC (8) · db:openalex (12)

  1. db:Europe PMC et al.. (2026). "Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.". https://doi.org/10.3390/ma19101993 →
  2. db:Europe PMC et al.. (2026). "Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.". https://doi.org/10.1186/s13065-026-01744-x →
  3. db:Europe PMC et al.. (2026). "Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil Niche Information from Contaminated Sites.". https://doi.org/10.3390/microorganisms14030678 →
  4. db:Europe PMC et al.. (2026). "Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.". https://doi.org/10.3390/nano16030165 →
  5. db:Europe PMC (2026). "Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.". https://doi.org/10.1021/acsomega.5c06688 →
  6. db:Europe PMC et al.. (2025). "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853.". https://doi.org/10.1038/s41598-025-29156-2 →
  7. db:Europe PMC et al.. (2025). "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.". https://doi.org/10.1039/d5ra03828f →
  8. db:openalex Hongyan Li, Lianxin Liu, Jianguo Cui et al.. (2020). "High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism". RSC Advances. https://doi.org/10.1039/d0ra01245a →
  9. db:openalex Tianwei He, Chunmei Zhang, Lei Zhang et al.. (2019). "Single Pt atom decorated graphitic carbon nitride as an efficient photocatalyst for the hydrogenation of nitrobenzene into aniline". Nano Research. https://doi.org/10.1007/s12274-019-2439-z →
  10. db:openalex Tarn C. Johnson, Bryony L. Elbert, Alistair J. M. Farley et al.. (2017). "Direct sulfonylation of anilines mediated by visible light". Chemical Science. https://doi.org/10.1039/c7sc03891g →
  11. db:openalex Wenting Wu, Liming Zhang, Shu‐Li You. (2016). "Catalytic asymmetric dearomatization (CADA) reactions of phenol and aniline derivatives". Chemical Society Reviews. https://doi.org/10.1039/c5cs00356c →
  12. db:openalex Hamideh Ahankar, Ali Ramazani, Katarzyna Ślepokura et al.. (2016). "Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation". Green Chemistry. https://doi.org/10.1039/c6gc00157b →
  13. db:openalex Tomohiro Sugahara, Kei Murakami, Hideki Yorimitsu et al.. (2014). "Palladium‐Catalyzed Amination of Aryl Sulfides with Anilines". Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201404355 →
  14. db:openalex Irina Sapurina, M. A. Shishov. (2012). "Oxidative Polymerization of Aniline: Molecular Synthesis of Polyaniline and the Formation of Supramolecular Structures". InTech eBooks. https://doi.org/10.5772/48758 →
  15. db:openalex Jannis Wenk, Silvio Canonica. (2012). "Phenolic Antioxidants Inhibit the Triplet-Induced Transformation of Anilines and Sulfonamide Antibiotics in Aqueous Solution". Environmental Science & Technology. https://doi.org/10.1021/es300485u →
  16. db:openalex Luana da Silva Magalhães Forezi. (2011). "Aniline (CAS No. 62-53-3)". Revista Virtual de Química. https://doi.org/10.5935/1984-6835.20110053 →
  17. db:openalex Xiangchun Meng, Haiyang Cheng, Yoshinari Akiyama et al.. (2009). "Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions". Journal of Catalysis. https://doi.org/10.1016/j.jcat.2009.03.008 →
  18. db:openalex D. V. Parke. (1960). "Studies in detoxication. 84. The metabolism of [14C]aniline in the rabbit and other animals". Biochemical Journal. https://doi.org/10.1042/bj0770493 →
  19. db:openalex R. A. M. Case, M. E. Hosker, David B. McDonald et al.. (1954). "Tumours Of The Urinary Bladder in Workmen Engaged in the Manufacture and Use Of Certain Dyestuff Intermediates In The British Chemical Industry. Part I. The Role Of Aniline, Benzidine, Alpha-Naphthylamine, And Beta-Naphthylamine". Occupational and Environmental Medicine. https://doi.org/10.1136/oem.11.2.75 →
📊 Physicochemical properties

Quick Reference

Formula: C6H7N
MW: 93.13 g/mol
CAS: 62-53-3
Appearance: Oily liquid; colorless when freshly distilled, darkens on exposure to air and light
Odour: Hedonic tone; pungent
Odour: Hedonic tone; pungent

Detailed Properties

Property Value Unit Conditions Source
Density (ρ) 1.0217 g/cm³ 20 °C (68 °F) CRC Handbook 105th ed. (Haynes 2024)
Melting Point (mp) -6.30 °C (20.7 °F) 1 atm CRC Handbook 105th ed. (Haynes 2024)
Boiling Point (bp) 184.10 °C (363.4 °F) 1 atm CRC Handbook 105th ed. (Haynes 2024)
Flash Point 70.00 °C (158 °F) closed cup CRC Handbook 105th ed. (Haynes 2024)
Vapor Pressure 0.490 mmHg 25 °C (77 °F) CRC Handbook 105th ed. (Haynes 2024)
Water Solubility 36.000 g/L 25 °C (77 °F) CRC Handbook 105th ed. (Haynes 2024)
Viscosity (η) 3.770 cP 25 °C (77 °F) CRC Handbook 105th ed. (Haynes 2024)
Refractive Index (nD) 1.5863 20 °C (68 °F), D-line CRC Handbook 105th ed. (Haynes 2024)
pKa 4.600 25 °C (77 °F) CRC Handbook 105th ed. (Haynes 2024)
🔬 Advanced Properties
Surface Tension 42.700 mN/m 20°C
Dielectric Constant (ε) 6.890 25°C
Heat Capacity (Cp) 2.060 J/(g·K) 25°C

Chemical Identifiers

SMILES: C1=CC=C(C=C1)N

Data sources: PubChem, NIST Chemistry WebBook, CRC Handbook of Chemistry and Physics (103rd ed.)

Last updated: 2026-06-30

Regulatory status of the substance
This substance is subject to regulatory requirements: hazardous waste management (BDO register). Details in the \"Regulatory Status (REACH/ECHA/CLP)\" section and on the SDS. Regulatory information — does not restrict purchase in this store.
🧮 Stoichiometry CalculatorMolGod_STOICH_1
🔍 External identifiersMolGod_EXTID_1
14 of 16 ID systems88%
DatabaseIdentifierActions
CAS Registry Number62-53-3Open →
PubChem CID6115Open →
InChIKeyPAYRUJLWNCNPSJ-UHFFFAOYSA-NOpen →
InChIInChI=1S/C6H7N/c7-6-4-2-1-3-5-6/h1-5H,7H2
SMILESC1=CC=C(C=C1)N
EC Number200-539-3Open →
ChEMBLCHEMBL538Open →
DrugBankDB06728Open →
KEGG CompoundC00292Open →
HMDBHMDB0003012Open →
ChemSpider5889Open →
MeSH UID (NLM)C023650Open →
UNII (FDA)SIR7XX2F1KOpen →
WikiData QIDQ186414Open →

Sources: PubChem (NIH), Wikidata SPARQL, KEGG, ChEMBL (EBI), CompTox CTX (EPA).

📡 Spectroscopy — CAS 62-53-3MolGod_SPECHUB_MAIN
📊 Spectra (NMR, IR, MS, UV-Vis) (1)

Available spectrum types: IR

IR spectrum (KBr, 4000-400 cm⁻¹)

440 data points · Source: NIST WebBook · NIST ↗ · 📥 JCAMP-DX
📋 Peak assignment table
Type Position Intensity Assignment
IR 450 0.1 —
IR 458 0.1 —
IR 466 0.1 —
IR 474 0.2 —
IR 482 0.2 —
IR 490 0.2 —
IR 498 0.2 —
IR 506 0.1 —
IR 514 0.1 —
IR 522 0.1 —
IR 530 0 —
IR 538 0 —
IR 546 0 —
IR 554 0 —
IR 562 0 —
IR 570 0 —
IR 578 0.1 —
IR 586 0.1 —
IR 594 0.1 —
IR 602 0.1 —
🎓 Spectrum interpretation guide (for students)
How to read an IR spectrum
  • 3200-3600 cm⁻¹ — O-H stretch (broad peak = hydrogen bonding)
  • 2850-3000 cm⁻¹ — C-H stretch (sp³)
  • 1650-1750 cm⁻¹ — C=O stretch (ketones, aldehydes, esters)
  • 1400-1600 cm⁻¹ — aromatic ring vibrations
  • 1000-1300 cm⁻¹ — C-O stretch (ethers, alcohols)
  • No absorption = no functional group → compare with a reference

Sources: LibreTexts ↗, Silverstein (Spectrometric ID) ↗

📚 Scientific references (Chicago Author-Date) (9 sources)

📚 The book bibliography is awaiting generation. Curated general textbooks are available below; CAS-specific Google Books can be fetched from the admin panel.

  1. National Institute of Standards and Technology. 2024. "NIST Chemistry WebBook, SRD 69." Gaithersburg, MD: NIST. Accessed 2025-01-01. ↗
  2. Spectral Database for Organic Structure Determination (SDBS). 2024. National Institute of Advanced Industrial Science and Technology (AIST), Japan. Accessed 2025-01-01. ↗
  3. Ulrich, Eldon L., Hideo Akutsu, John F. Doreleijers, Yoko Harano, Yannis E. Ioannidis, Jundong Lin, Miron Livny, et al. 2008. "BioMagResBank." Nucleic Acids Research 36 (D1): D402–D408. [DOI ↗]
  4. Horai, Hisayuki, Masanori Arita, Shigehiko Kanaya, Yoshito Nihei, Tasuku Ikeda, Kazuhiro Suwa, Yuya Ojima, et al. 2010. "MassBank: A Public Repository for Sharing Mass Spectral Data for Life Sciences." Journal of Mass Spectrometry 45 (7): 703–714. [DOI ↗]
  5. Linstrom, P.J., and W.G. Mallard, eds. 2024. NIST Chemistry WebBook, NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology. ↗
  6. McDonald, M. Shane, Mike McAvoy, and Ajit Bhalerao. 1988. "JCAMP-DX: A Standard Form for Exchange of Infrared Spectra in Computer Readable Form." Applied Spectroscopy 42 (1): 151–162. [DOI ↗]
  7. PubChem. 2024. "PubChem Compound Database." National Library of Medicine, National Institutes of Health. Accessed 2025-01-01. ↗
📐 Physical & Chemical Properties (DB) 16 fields MolGod Score: Primary
Property Value Unit Conditions Source
Melting point -6.30 [1][6][11] °C 1 atm CRC Handbook 105th ed. (Haynes 2024)
Boiling point 184.10 [1][6][11] °C 760 mmHg CRC Handbook 105th ed. (Haynes 2024)
Water solubility 36.000 [1] g/L 25°C CRC Handbook 105th ed. (Haynes 2024)
Density (ρ) 1.0217 [1] g/cm³ 20°C CRC Handbook 105th ed. (Haynes 2024)
Refractive index (n_D) 1.5863 [1] — 20°C, sodium D CRC Handbook 105th ed. (Haynes 2024)
Viscosity (η) 3.770 [1] cP 25°C CRC Handbook 105th ed. (Haynes 2024)
Vapor pressure 0.490 [1] mmHg 25°C CRC Handbook 105th ed. (Haynes 2024)
Flash point 70.00 [1] °C closed cup CRC Handbook 105th ed. (Haynes 2024)
Autoignition temperature 615.00 [1] °C in air CRC Handbook 105th ed. (Haynes 2024)
UV λmax 280 [1][2] nm water/MeOH CRC Handbook 105th ed. (Haynes 2024)
UV εmax 1430 [1][2] M⁻¹·cm⁻¹ at λmax CRC Handbook 105th ed. (Haynes 2024)
pKa₁ 4.600 [1][2][10] — 25°C CRC Handbook 105th ed. (Haynes 2024)
logP (octanol/water) 0.900 [1][8][9] — 25°C CRC Handbook 105th ed. (Haynes 2024)
Dielectric constant (ε) 6.890 [1] — 25°C CRC Handbook 105th ed. (Haynes 2024)
Surface tension 42.700 [1] mN/m 20°C CRC Handbook 105th ed. (Haynes 2024)
Specific heat (cp) 2.060 [1] J/(g·K) 25°C CRC Handbook 105th ed. (Haynes 2024)
📚 Scientific references (Chicago Author-Date) (12 sources)
  1. Haynes, William M., ed. 2024. CRC Handbook of Chemistry and Physics. 105th ed. Boca Raton: CRC Press/Taylor & Francis. ISBN 978-1-032-55554-4. ↗
  2. National Institute of Standards and Technology. 2024. "NIST Chemistry WebBook, SRD 69." Gaithersburg, MD: NIST. Accessed 2025-01-01. ↗
  3. Yaws, Carl L. 2014. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. 2nd ed. Oxford: Gulf Professional Publishing.
  4. PubChem. 2024. "PubChem Compound Database." National Library of Medicine, National Institutes of Health. Accessed 2025-01-01. ↗
  5. Marrero, J., and R. Gani. 2001. "Group-Contribution Based Estimation of Pure Component Properties." Fluid Phase Equilibria 183–184: 183–208. ↗
  6. Joback, K. G., and R. C. Reid. 1987. "Estimation of Pure-Component Properties from Group-Contributions." Chemical Engineering Communications 57 (1–6): 233–243. ↗
  7. Sangster, J. 1997. Octanol-Water Partition Coefficients: Fundamentals and Physical Chemistry. Chichester: Wiley. ISBN 978-0-471-97397-3.
  8. Mannhold, Raimund, and Han van de Waterbeemd. 2001. "Substructure and Whole Molecule Approaches for Calculating Log P." Journal of Computer-Aided Molecular Design 15 (4): 337–354. ↗
  9. Perrin, Ditlev D., Boyd Dempsey, and E. P. Serjeant. 1981. pKa Prediction for Organic Acids and Bases. London: Chapman and Hall. ISBN 0-412-21090-5.
  10. Constantinou, Leonidas, and Rafiqul Gani. 1994. "New Group Contribution Method for Estimating Properties of Pure Compounds." AIChE Journal 40 (10): 1697–1710. ↗
  11. Ertl, Peter, Bernhard Rohde, and Paul Selzer. 2000. "Fast Calculation of Molecular Polar Surface Area as a Sum of Fragment-Based Contributions and Its Application to the Prediction of Drug Transport Properties." Journal of Medicinal Chemistry 43 (20): 3714–3717. ↗
🔄 Concentration unit converter LIVE MolGod_UNITCONV_1

Enter the Aniline concentration in any unit — the rest will be calculated automatically.

MW: 93.13 g/mol · IUPAC Gold Book ↗

⚗️ Conversion formulas + citations (per formula)
ConversionFormulaAccuracySource
% (w/v) ↔ molarityc (mol/L) = (% × 10) / MW±0.5% rel. when density ≈ 1.0 g/mLIUPAC (2019)
millimolar ↔ molarc (mol/L) = mM × 10⁻³ExactCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
molarity (mol/L)c = n/V = (m/MW)/V±0.1% (depends on MW precision)IUPAC (2019)
parts per million (mg/L) ↔ molarityc (mol/L) = ppm / (1000 × MW); equivalently ppm = mg/L for dilute aqueous±1% (density-independent for dilute solutions)IUPAC (2019)
mg/mL ↔ molarityc (mol/L) = (mg/mL × 1000) / MW / 1000 = mg/mL / MW × 1±0.2%Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
g/L ↔ molarityc (mol/L) = (g/L) / MW±0.1% (depends on MW precision)Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
mmol/L ↔ molarityc (mol/L) = mmol/L × 10⁻³ExactCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
Celsius ↔ KelvinT(K) = t(°C) + 273.15±0.01 K (ITS-90 scale)BIPM (Bureau International des Poids et Mesures) (2019)
Celsius ↔ FahrenheitT(°F) = T(°C) × 9/5 + 32±0.1 °FThompson A, Taylor BN (2008)
density-corrected % ↔ molarityc (mol/L) = (%w/w × ρ × 10) / MW, ρ in g/mL±0.1% when ρ known to 3 decimalsCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
📚 Bibliography (8 authoritative sources)
  1. Thompson A, Taylor BN (2008). Guide for the Use of the International System of Units (SI). NIST Special Publication 811 · DOI: 10.6028/NIST.SP.811-2008
    → Primary SI standard for US scientific usage
  2. Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007). Quantities, Units and Symbols in Physical Chemistry — The IUPAC Green Book. RSC Publishing, 3rd ed. · DOI: 10.1039/9781847557889 · ISBN: 978-0-85404-433-7
    → Canonical IUPAC guide for chemistry quantities/units
  3. BIPM (Bureau International des Poids et Mesures) (2019). The International System of Units (SI), 9th edition. BIPM · ↗
    → International SI definitions (incl. redefined kilogram 2019)
  4. ISO/IEC (2022). Quantities and units — Part 1: General. International Organization for Standardization — ISO 80000-1:2022 · ↗
    → General rules for physical quantities and units
  5. ISO/IEC (2019). Quantities and units — Part 9: Physical chemistry and molecular physics. International Organization for Standardization — ISO 80000-9:2019 · ↗
    → Concentration / molality / amount-of-substance conventions
  6. Tiesinga E, Mohr PJ, Newell DB, Taylor BN (2021). CODATA recommended values of the fundamental physical constants: 2018. Rev. Mod. Phys. 93(2):025010 · DOI: 10.1103/RevModPhys.93.025010
    → Avogadro, gas constant, molar volume (2019 SI revision)
  7. IUPAC (2019). Compendium of Chemical Terminology — the IUPAC Gold Book (online). IUPAC · DOI: 10.1351/goldbook
    → Definitions of mass fraction, molality, normality, ppm, activity
  8. Mills IM, Cvitaš T, Homann K, Kallay N, Kuchitsu K (1988). Quantities, Units and Symbols in Physical Chemistry. Blackwell Scientific Publications, 1st ed. · ISBN: 0-632-01773-5
    → Historical predecessor of IUPAC Green Book
🧪 Solution Preparation Wizard WIZARD MolGod_PREP_1
① Select concentration
② Target volume
③ Solvent

Calculations per: IUPAC Gold Book ↗, Merck ↗

Solvent compatibilityMolGod_SOLV_1

Estimate based on water solubility and logP. Indicative data — does not replace experimental studies.

SolventCompatibilityNotesReferences
Water~ ModerateModerate logP
EtOH+ GoodEtOH — universal polar solvent
Acetone+ GoodAcetone — good for moderately polar compounds
DCM+ GoodDCM — good for nonpolar compounds
DMSO+ GoodDMSO — strong aprotic solvent
THF+ GoodTHF — broad solubility range
Hexane- PoorPoor solubility in hexane
CHCl3+ GoodCHCl3 — good for moderately polar and nonpolar compounds

Data sources for logP/solubility: logP: 0.90

📚 Scientific references for solvents (Chicago Author-Date) — click to expand

Each solvent is supported by 5 independent scientific sources (NIST/CRC/IARC/Hansen/Reichardt/Smallwood/GESTIS). Full citations below.

Water · NIST CAS lookup ↗
  1. Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
  2. International Association for the Properties of Water and Steam (IAPWS). 1997. "Release on the Static Dielectric Constant of Ordinary Water Substance." IAPWS R8-97. [link ↗]
  3. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. https://doi.org/10.1002/9783527632220. [link ↗]
  4. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. https://doi.org/10.1201/9781420006834. [link ↗]
  5. IFA. n.d. "Water." GESTIS Substance Database. Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung. Accessed April 25, 2026. [link ↗]
EtOH · NIST CAS lookup ↗
  1. Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
  2. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. https://doi.org/10.1002/9783527632220. [link ↗]
  3. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Hoboken, NJ: Wiley. https://doi.org/10.1002/9780470508183. [link ↗]
  4. Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. https://doi.org/10.1016/B978-0-340-64578-9.X5000-9. [link ↗]
  5. IFA. n.d. "Ethanol." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
Acetone · NIST CAS lookup ↗
  1. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. https://doi.org/10.1002/9783527632220. [link ↗]
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  3. Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
  4. Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. [link ↗]
  5. IFA. n.d. "Acetone." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
DCM · NIST CAS lookup ↗
  1. National Institute of Standards and Technology. n.d. "Methane, dichloro- (CAS 75-09-2)." NIST Chemistry WebBook, SRD 69. Accessed April 25, 2026. [link ↗]
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  3. International Agency for Research on Cancer. 1999. "Dichloromethane." IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 71: 251–315. [link ↗]
  4. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. [link ↗]
  5. IFA. n.d. "Dichloromethane." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
DMSO · NIST CAS lookup ↗
  1. Wypych, George. 2019. Handbook of Solvents. Volume 1: Properties. 3rd ed. Toronto: ChemTec Publishing. https://doi.org/10.1016/C2018-0-02235-3. [link ↗]
  2. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. [link ↗]
  3. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  4. National Institute of Standards and Technology. n.d. "Methane, sulfinylbis- (CAS 67-68-5)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
  5. IFA. n.d. "Dimethyl sulfoxide." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
THF · NIST CAS lookup ↗
  1. Armarego, Wilfred L. F., and Christina Li Lin Chai. 2009. Purification of Laboratory Chemicals. 6th ed. Oxford: Butterworth-Heinemann. https://doi.org/10.1016/B978-1-85617-567-8.50003-3. [link ↗]
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  3. National Institute of Standards and Technology. n.d. "Furan, tetrahydro- (CAS 109-99-9)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
  4. Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. [link ↗]
  5. IFA. n.d. "Tetrahydrofuran." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
Hexane · NIST CAS lookup ↗
  1. National Institute of Standards and Technology. n.d. "Hexane (CAS 110-54-3)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  3. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Hoboken, NJ: Wiley. [link ↗]
  4. Agency for Toxic Substances and Disease Registry. 1999. Toxicological Profile for n-Hexane. Atlanta, GA: U.S. Department of Health and Human Services. [link ↗]
  5. IFA. n.d. "n-Hexane." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
CHCl3 · NIST CAS lookup ↗
  1. International Agency for Research on Cancer. 1999. "Chloroform." IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 73: 131–182. [link ↗]
  2. National Institute of Standards and Technology. n.d. "Methane, trichloro- (CAS 67-66-3)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
  3. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
  4. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. [link ↗]
  5. IFA. n.d. "Chloroform." GESTIS Substance Database. Accessed April 25, 2026. [link ↗]
Solubility theory (applied in compatibility prediction):
  1. Yalkowsky, Samuel H., and Shri C. Valvani. 1980. "Solubility and Partitioning I: Solubility of Nonelectrolytes in Water." Journal of Pharmaceutical Sciences 69 (8): 912–922. https://doi.org/10.1002/jps.2600690814 — General Solubility Equation (GSE): logS = 0.5 − logP − 0.01(MP−25).
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. https://doi.org/10.1201/9781420006834 — HSP triplet (dD, dP, dH) + Ra formula.
  3. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. https://doi.org/10.1002/9783527632220 — E_T(30) polarity scale, solwatochromia.
  4. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Hoboken, NJ: Wiley. https://doi.org/10.1002/9780470508183 — Eluotropic series, polarity index.
  5. PubChem Compound Database — CAS 62-53-3 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.

Full bibliography in the REFERENCES accordion (at the bottom of the page) — Chicago Manual of Style 17th ed., Author-Date.

🛡️ Safety — CAS 62-53-3MolGod_SAFEHUB_MAIN
Data limitations notice. The safety information on this page is for reference only and does not replace a full safety data sheet (SDS). Before using the product, consult the manufacturer's current safety data sheet and the GHS/CLP guidance. The CLP classification applies to the pure bulk substance, not to commercial formulations.

GHS/CLP classification — Regulation (EC) No 1272/2008 + UN GHS Rev. 9 (2021).

⚠️ Danger
GHS05 — Corrosive
GHS05 Corrosive
GHS06 — Toxic
GHS06 Toxic
GHS07 — Irritant / harmful
GHS07 Irritant / harmful
GHS08 — Health hazard
GHS08 Health hazard
GHS09 — Environmental hazard
GHS09 Environmental hazard

🚨 Hazard statements (H)

  • H351 — Suspected of causing cancer
  • H341 — Suspected of causing genetic defects
  • H331 — Toxic if inhaled
  • H311 — Toxic in contact with skin
  • H301 — Toxic if swallowed
  • H372 — Causes damage to organs through prolonged or repeated exposure
  • H318 — Causes serious eye damage
  • H317 — May cause an allergic skin reaction
  • H400 — Very toxic to aquatic life

🛡 Precautionary statements (P)

  • P203 — Obtain, read and follow all safety instructions before use

✓ Harmonised classification pursuant to Annex VI of the CLP Regulation (EC) 1272/2008 (official, binding classification). Index number: 612-008-00-7.

Reference (Chicago): European Chemicals Agency. "aniline, Index No. 612-008-00-7." In Table 3 of Annex VI to Regulation (EC) No 1272/2008 (CLP Regulation), 23rd Adaptation to Technical Progress. Helsinki: European Chemicals Agency, 2026. https://echa.europa.eu/information-on-chemicals/annex-vi-to-clp.

⚠ IARC — Group 2A: probably carcinogenic to humans. (Independent assessment of carcinogenicity evidence by IARC/WHO — supplements the CLP classification above.)
Reference (Chicago): IARC. 2026. IARC Monographs on the Identification of Carcinogenic Hazards to Humans: CAS 62-53-3. Lyon, France: International Agency for Research on Cancer, World Health Organization. https://monographs.iarc.who.int/list-of-classifications/. (Accessed 2026-11-12.)

Translations: CLP Regulation (EC) 1272/2008, Annexes III and IV. Data: PubChem/NLM.

📚 Consolidated scientific references — Chicago Author-Date 10 sources

References collected from all Safety Hub tabs. CAS: 62-53-3 · PubChem ↗

  1. Parlament Europejski i Rada UE. 2008. "Rozporządzenie (WE) nr 1272/2008 w sprawie klasyfikacji, oznakowania i pakowania substancji (CLP)." Dz.Urz. UE L 353. [↗] GHS, Regulations
  2. United Nations Economic Commission for Europe (UNECE). 2021. "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), Ninth Revised Edition." United Nations, Geneva. [↗] GHS
  3. Goldfrank, Lewis R., Robert S. Hoffman, Mary Ann Howland, et al.. 2019. "Goldfrank's Toxicologic Emergencies, 11th ed.." McGraw-Hill Education, New York. ISBN 978-1-25-985961-8. Pierwsza pomoc, Toksykologia
  4. National Institute for Occupational Safety and Health (NIOSH). 2023. "NIOSH Pocket Guide to Chemical Hazards (DHHS Publ. 2005-149)." U.S. Department of Health and Human Services / CDC, Cincinnati, OH. [↗] Pierwsza pomoc, PPE, Toksykologia
  5. European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms." CEN, Brussels. [↗] PPE
  6. UNECE. 2023. "European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR 2025)." United Nations, Geneva. [↗] Utylizacja, Regulacje
  7. National Fire Protection Association (NFPA). 2022. "NFPA 400 — Hazardous Materials Code." NFPA, Quincy, MA. [↗] Magazynowanie
  8. Urben, P.G. (ed.). 2017. "Bretherick's Handbook of Reactive Chemical Hazards, 8th ed.." Butterworth-Heinemann / Elsevier, Oxford. [↗] Magazynowanie
  9. Ministerstwo Klimatu i Środowiska RP. 2023. "Baza danych o produktach i opakowaniach oraz o gospodarce odpadami (BDO)." Ministerstwo Klimatu i Środowiska, Warszawa. [↗] Utylizacja
  10. International Agency for Research on Cancer (IARC / WHO). 2024. "IARC Monographs on the Identification of Carcinogenic Hazards to Humans — List of Classifications." WHO, Lyon. [↗] Toksykologia

Tabs with their own references (Emergency, PPE, Storage, Waste) contain additional bibliographic entries within their respective sections.

📈 Analytical statistics (t-test · RSD · Grubbs · Q-Dixon) ICH Q2

Paste a series of replicate measurements (CSV, or one number per line). The calculator computes the mean, standard deviation and 95% CI, and detects outliers (Grubbs + Dixon Q).

Separator: comma, space, tab, new line. Minimum 3 measurements.
📐 Statistical formulas
  • x̄ = Σxᵢ / n — arithmetic mean
  • s² = Σ(xᵢ - x̄)² / (n-1) — sample variance
  • s = √s² — standard deviation
  • RSD% = (s / x̄) × 100% — relative standard deviation
  • CI₉₅ = x̄ ± t(0.05, n-1) × s / √n — Student's t
  • G = |xᵢ - x̄| / s — Grubbs' test
  • Q = |xsuspect - xnearest| / |xmax - xmin| — Dixon Q-test

Source: ICH Q2(R2) Validation of Analytical Procedures · ICH PDF ↗

🧪 Buffer Recipe Calculator UNIQUE
References: pKa values from Goldberg NIST 81 · CRC Handbook 100th ed. · Stoll & Blanchard 1990 (DOI)

Choose a buffer from the list of 20 popular systems → enter the target pH → get an exact recipe with the masses to weigh out.

Step 1: Choose a buffer system

📜 Recipe history (last 10)
🔬 HPLC/GC methods (1 method)
📄
Comparative Phytochemical Studies on the Aerial Parts of Teucrium davaeanum Coss. and Teucrium zanonii Pamp.
GC-MSMolecules202686% ✓CC-BYResearch method (specificity, robustness)
Column: C18
Phase: mobile phase used was a MeOH–acetone–H2O (4:1:1, 500 mL) solvent system, and…
Detection: UV 400 nm
Flow: 10.00 mL/min
Temp.: 50.0 °C
Gradient: medium-pressure liquid chromatography (Büchi MPLC, equipped with C-601 and C-605…
Aldaba R, Hanoğlu A, Yiğit Hanoğlu D, Başer K, Öztürk M, Gören A, et al. Comparative Phytochemical Studies on the Aerial Parts of Teucrium davaeanum Coss. and Teucrium zanonii Pamp. Molecules. 2026;31:2196. doi:10.3390/molecules31122196
🔗 DOI🏠 PMC📚 PubMed📄 PDF
Phytochemical studies performed on the aerial parts of Teucrium davaeanum Coss. resulted in the isolation of an iridoid diglycoside, teucardoside; two phenylethanoid triglycosides, poliumoside and 3-O-methyl-poliumoside; a flavon C-diglycoside, vicenin-2 (apigenin-6,8-di-C-glycoside); and a newly described bisdesmosidic oleanane-type triterpene saponin, davaeanoside. Structure elucidations of all isolated metabolites are based on extensive spectroscopic analysis and chemical derivatizations. The extract and isolated compounds (1–5) were tested for α-amylase and α-glucosidase inhibitory activity. IC50 values were measured for all extracts and compounds and compared against acarbose. Results revealed weak or moderate α-amylase and α-glucosidase inhibitory activity at the tested concentrations of the isolated compounds, especially compound 5. However, these findings do not exclude antidiabetic activity mediated by other mechanisms such as modulation of insulin signaling, enhancement of glucose uptake, or antioxidant effects. Further studies are warranted to explore these potential pathways. In addition, the essential oils of T. davaeanum and T. zanonii were obtained by hydrodistillation and simultaneously analyzed by GC-FID and GC/MS. The major compounds of T. davaeanum essential oil were germacrene D (31.4%) and bicyclogermacrene (15.9%); the main compounds of T. zanonii were β-pinene (19.5%), α-muurolene (13.4%), oxo-7,8-dihydro-β-ionol (9.2%), and α-pinene (6.9%).
Lamiaceaeiridoidsphenylethanoidsflavonoidssaponinsantidiabetic activity
📈 Method Validation (ICH Q2)

No validation data. Contact the method author.

Parameters per: ICH Q2(R2) ↗

🔧 Troubleshooting HPLC/GC
Broad peaks / tailing
Causes: Worn column, wrong mobile-phase pH, column overload, dead volume
Solution: Replace the column, check buffer pH (±0.2), reduce injection volume, check fittings
Baseline drift
Causes: Contaminated mobile phase, gradient issues, unstable temperature
Solution: Degas the phase, filter 0.22 µm, stabilise column temperature, flush the system
No peak
Causes: Wrong wavelength, analyte does not elute, thermal decomposition, wrong phase
Solution: Check λmax, extend the gradient, lower the temperature, change the mobile phase
Ghost peaks
Causes: System contamination, carry-over, contaminated vials
Solution: Clean the system (MeOH/H₂O), use new vials, inject a blank
Low recovery
Causes: Adsorption to walls, insufficient extraction, decomposition
Solution: Add IS, silanise glassware, optimise extraction, check stability

Sources: Snyder, Kirkland & Dolan ↗, Waters ↗

📊 HPLC method validation (ICH Q2(R1)) PARTIAL

3 metrics need experimental data

Parameter Value Unit ICH Q2 criterion Status
Linearity (R²) no data unitless R² ≥ 0.999 (≥0.99 for bioanalytical) —
LOD (S/N = 3:1) no data ng/mL S/N ≥ 3:1 (lowest detectable concentration) —
LOQ (S/N = 10:1) no data ng/mL S/N ≥ 10:1 (LOQ ≥ 3×LOD typically) —
Precision (RSD intraday, n=6) no data % RSD RSD ≤ 2% (intraday) / ≤ 3% (interday) for the API —
Accuracy (recovery, 3 levels) no data % (target 100±2%) Recovery 98-102% (target 100%) —
Linearity range no data e.g. 0.1-100 ng/mL Min. 80-120% of the nominal concentration —
Selectivity/Specificity no data qualitative No interference — analyte peak fully resolved (Rs ≥ 2.0) —
Robustness no data RSD < 2% at ±5% variation RSD < 2% under small parameter variations —
Legend: ✓ PASS ⚠ CAUTION ✗ FAIL — NO_DATA
📚 Scientific references (Chicago Author-Date) — click to expand

Analytical method validation standards — 4 independent sources (ICH + USP + AOAC + Snyder).

  1. International Conference on Harmonisation (ICH). 2005. Validation of Analytical Procedures: Text and Methodology Q2(R1). ICH Expert Working Group. [link ↗] — Gold-standard ICH guideline — accepted by EMA, FDA, MHLW, NMPA
  2. United States Pharmacopeia (USP) Convention. 2024. USP General Chapter <621> Chromatography. USP-NF 2024 ed. USP. [link ↗]
  3. AOAC International. 2016. Appendix F: Guidelines for Standard Method Performance Requirements. AOAC INTERNATIONAL. [link ↗] — AOAC SMPR — alternative to ICH Q2 for food/dietary supplements
  4. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. John Wiley & Sons. ISBN 978-0-470-16754-0. https://doi.org/10.1002/9780470508183 [link ↗] — Industry standard textbook — Chapter 11 covers method validation
  5. Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. Practical HPLC Method Development. 2nd ed. Wiley. ISBN 978-0-471-00703-6. — Classic method-development reference (DryLab heritage).
  6. Rozet, Eric, et al.. 2013. Analysis of recent pharmaceutical regulatory documents on analytical method validation. https://doi.org/10.1016/j.chroma.2007.03.111 [link ↗] — Comparison of FDA / EMA / ICH validation expectations — used for ICH Q2(R1) interpretation.
  7. Heyden, Yvan Vander, et al.. 2009. Robustness of pharmaceutical liquid chromatographic methods. https://doi.org/10.1016/j.jchromb.2008.10.052 [link ↗] — Plackett-Burman design for robustness — basis of ICH Q2 §3.7.
  8. Dong, Michael W.. 2019. HPLC and UHPLC for Practicing Scientists. 2nd ed. Wiley. ISBN 978-1-119-31378-3. https://doi.org/10.1002/9781119313793 [link ↗] — Modern (UHPLC) update of validation chapter — practical RSD/LOD examples.
  9. Meyer, Veronika R.. 2010. Practical High-Performance Liquid Chromatography. 5th ed. Wiley. ISBN 978-0-470-68218-0. — European pharmacopeial perspective — complements USP/AOAC.
  10. Kazakevich, Yuri V., and Rosario LoBrutto, eds.. 2007. HPLC for Pharmaceutical Scientists. Wiley-Interscience. ISBN 978-0-471-68162-4. https://doi.org/10.1002/9780470087954 [link ↗] — Pharma-focused validation case studies (specificity, robustness).
  11. European Medicines Agency (EMA). 2011. Guideline on bioanalytical method validation EMEA/CHMP/EWP/192217/2009. EMA Committee for Medicinal Products for Human Use. [link ↗] — EMA bioanalytical companion to ICH Q2(R1) for clinical samples.

· ⚠ SVHC/REACH regulatory warnings ↑

🔧 HPLC troubleshooting — decision tree 6 common problems

Diagnostics for the 12 most common HPLC problems with a decision tree (5 steps per problem). Source: Snyder/Kirkland/Dolan 3rd ed. Chapter 17 + LCGC LC Troubleshooting columns 1989-2024.

Broad peaks medium

Symptom: All peaks on the chromatogram are wider than expected (FWHM > 2× normal)

🔍 Diagnostic tree:
  1. 1. Check whether all peaks are broadened or only some
    → YES: All → instrumental problem (column or system)
    → NO: Only some → chemistry problem (interaction with the column for specific analytes)
  2. 2. Swap in a test column — does the problem disappear?
    → YES: COLUMN worn out — packing damaged, void in the first few mm. Replace it.
    → NO: Problem in the LC system
  3. 3. Check the dead volume — injection loop, connections, detector
    → YES: Loop > 100 µL for a 4.6 mm column or loose connections → replace ferrules, shorten tubing
    → NO: Continue diagnostics
  4. 4. Temperature test: raise the column from 25°C to 40°C
    → YES: Narrower peaks → mass-transfer kinetics too slow (increase T)
    → NO: Continue
  5. 5. Check flow rate vs the optimal van Deemter value for this column
    → YES: Optimum for 4.6mm/5µm = 1.0 mL/min, for 2.1mm/3µm = 0.4 mL/min
    → NO: Continue
⚠️ Common causes:
  • Column worn out (>2000 injections without a guard)
  • System dead volume > 100 µL (wrong loop, long tubing, loose ferrules)
  • Temperature too low (mass-transfer kinetics)
  • Flow rate outside the van Deemter optimum
  • Sample solvent stronger than mobile phase A
✓ Fixes:
  • ✓ Replace the column (when >2000 injections)
  • ✓ Check all connections — keep tubing as short as possible
  • ✓ Increase column T to 40°C (if the substance is stable)
  • ✓ Reduce flow to the van Deemter optimum
  • ✓ Dissolve the sample in mobile phase A (not in pure organic)
Peak tailing (T > 1.5) high

Symptom: Peaks have an extended "tail" on the late-elution side (asymmetry T = b/a > 1.5 per USP)

🔍 Diagnostic tree:
  1. 1. Does the substance contain basic groups (amino, pyridine)?
    → YES: Yes → silanol interactions! Add 0.1% TFA or 5-10 mM TEA to mobile phase A.
    → NO: Continue
  2. 2. Check the mobile-phase pH vs the substance pKa
    → YES: pH = pKa ± 1 → partial ionization, peak split. Move pH ≥ 2 units away from pKa.
    → NO: Continue
  3. 3. Check the column age (>1500 injections?)
    → YES: Yes → exposed silanols (column bleed). Replace with a column with higher endcapping (XTerra, Symmetry).
    → NO: Continue
  4. 4. Does the sample contain metals (Fe, Cu from glass vials)?
    → YES: Yes → use type II clear vials or PFA. Add 0.1mM EDTA to the sample.
    → NO: Continue
⚠️ Common causes:
  • Silanol interactions (basic analyte + silica gel free silanols)
  • pH at the boundary of the analyte pKa (peak split)
  • Old column (column bleed, high silanol activity)
  • Metals in the sample (chelation → tailing)
  • Column overload (>50 µg on a 4.6mm column)
✓ Fixes:
  • ✓ Add 0.1% TFA (UV) or 0.1% formic acid (LC-MS) to mobile phase A
  • ✓ Choose a column with high-purity endcapping: Waters XBridge BEH, Phenomenex Kinetex
  • ✓ Work at pH ≥ 2 units away from pKa
  • ✓ Add 0.1mM EDTA to the sample (Fe/Cu chelation)
  • ✓ Reduce the injection volume to ≤ 20 µL for a 4.6mm column
Baseline drift medium

Symptom: The baseline rises or falls systematically for >5 minutes

🔍 Diagnostic tree:
  1. 1. Are you running a gradient (B% increasing)?
    → YES: Yes → different absorption of phases A vs B at dλ. Solvent change in UV cutoff. Check the % organic UV absorbance.
    → NO: Continue (isocratic)
  2. 2. Check the column temperature — is it stable to ±0.5°C?
    → YES: Yes (stable) → continue
    → NO: Unstable → turn on the column thermostat (>25°C controlled)
  3. 3. Test: turn off the autosampler, run pump+column+detector alone
    → YES: Drift disappears → autosampler contamination (clean the needle, septum)
    → NO: Continue
  4. 4. Check the lamp age (D2 for UV)
    → YES: Yes (>1500 hours) → replace the lamp
    → NO: Continue
⚠️ Common causes:
  • Gradient elution with different UV cutoff of the phases
  • Unstable column T
  • Autosampler contamination of the needle/septum
  • Old UV lamp (>1500h)
  • Detector flow cell fouled
  • Column not equilibrated (<10 column volumes)
✓ Fixes:
  • ✓ Pre-equilibrate the column for 10-15 column volumes at 100% A
  • ✓ Column thermostat on, T 30-40°C stable
  • ✓ Clean the detector flow cell with 50:50 ACN:H2O
  • ✓ Replace the D2 lamp if >1500h
  • ✓ Use baseline subtraction (Chromeleon, Empower native function)
No peak / lost peak critical

Symptom: The expected analyte peak does not appear on the chromatogram

🔍 Diagnostic tree:
  1. 1. Did the injection actually take place?
    → YES: Check the autosampler log, pump pressure (should drop during injection)
    → NO: Autosampler problem → check the loop, needle, sample in the vial
  2. 2. Is the sample in the vial (correct volume, not evaporated)?
    → YES: Continue
    → NO: No sample — re-pipette
  3. 3. Sample stability — prepared >24h ago?
    → YES: Yes → degradation. Re-prepare a fresh sample.
    → NO: Continue
  4. 4. Check the detection wavelength vs the substance λmax
    → YES: Detection at λ does NOT match λmax → no signal. Scan DAD 200-400nm.
    → NO: Continue
  5. 5. Test: inject a pure standard (of known concentration, fresh)
    → YES: The standard gives a peak → problem with the sample (matrix, derivatization)
    → NO: No peak even with the standard → system problem (column, phase, gradient)
⚠️ Common causes:
  • Sample not drawn from the vial (autosampler bug)
  • Sample degraded (>24h pH/temp/light)
  • Detection at the wrong wavelength
  • Wrong mobile phase (e.g. forgotten TFA)
  • Column reversed / wrong stationary phase
  • Substance elutes at the front (V0) → unretained, not visible
✓ Fixes:
  • ✓ Re-prepare a fresh sample per the exact protocol
  • ✓ UV-Vis DAD scan 200-400nm + search for λmax
  • ✓ Check the mobile-phase composition — was TFA added?
  • ✓ Test the reverse column direction (carefully!)
  • ✓ For retention <1 min — lower the % B, MeOH instead of ACN
  • ✓ Check the "expected_rt" table in wp_molgod_hplc_methods
Pressure too high critical

Symptom: Pump pressure > 80% of the column max or system shutdown with a high-pressure error

🔍 Diagnostic tree:
  1. 1. Check that the column is connected correctly (arrow direction)
    → YES: OK
    → NO: Column reversed → flip it (never run it "backwards")
  2. 2. Test: remove the column from the system, run pump+detector alone
    → YES: Pressure drops to <50 bar → problem in the column (clogged)
    → NO: Pressure stays high → in-line filter clogged, frit fouled
  3. 3. Check the pre-column filter (in-line frit)
    → YES: Fouled and brown → replace it
    → NO: Continue
  4. 4. Back-flush the column with 50:50 ACN:H2O without the column — does it disappear?
    → YES: Particles stuck in the first mm — a 30 min flush may recover it
    → NO: Replace the column
⚠️ Common causes:
  • In-line filter (frit) clogged with particles
  • Buffer salting out (precipitation at high %B)
  • Sample contains suspended matter (filter 0.22 µm before injection)
  • Column clogged (column bed compaction)
  • Gradient with a buffer phase + high organic → salt precipitation
✓ Fixes:
  • ✓ ALWAYS filter the sample through 0.22 µm PVDF before injection
  • ✓ Replace the in-line filter every 100 injections (or when pressure rises >20%)
  • ✓ Do NOT use >20mM phosphate buffer + >70% ACN (the salt precipitates)
  • ✓ Flush the column for 30 min with 50:50 ACN:H2O in the reverse direction (when the manufacturer allows it)
  • ✓ Pre-column 4×3mm to protect the main column
Ghost peaks high

Symptom: Unexplained peaks on the chromatogram absent from the calibration

🔍 Diagnostic tree:
  1. 1. Test: blank injection (pure sample solvent)
    → YES: A ghost appears → contamination of the system or eluents
    → NO: Appears only with the sample → matrix
  2. 2. Does the ghost grow with the gradient (elutes at high %B)?
    → YES: Yes → overloaded column or strong-retained from a previous run
    → NO: Independent of the gradient → autosampler carryover
  3. 3. Increase carryover wash (between injections)
    → YES: Helps → carryover was to blame. Use a stronger wash protocol.
    → NO: Continue
  4. 4. Pure water injection — is there a peak?
    → YES: Yes → contamination of the water source (organics from the DI system)
    → NO: Continue
⚠️ Common causes:
  • Carryover in the autosampler needle/loop
  • Eluent contamination (even HPLC-grade)
  • Strong-retained components from previous runs
  • Plastic in the vials (phthalates, PEG from the caps)
  • Insufficiently purified DI water
✓ Fixes:
  • ✓ Strengthen the wash protocol: 100% B → 100% A → 50:50 (3 cycles)
  • ✓ Strong wash: 100% DMSO or 100% MeOH before calibration
  • ✓ Filter the eluents through 0.22 µm PTFE if in doubt
  • ✓ Use amber glass + Teflon-lined caps for samples
  • ✓ Periodic gradient ramp to 100% B for 10 min (clean-out)
📚 Scientific references (Chicago Author-Date) — click to expand
  1. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. John Wiley & Sons. Chapter 17 (Troubleshooting) pp. 559-616. ISBN 978-0-470-16754-0. https://doi.org/10.1002/9780470508183 [link ↗]
  2. Dolan, John W.. 2014. LC Troubleshooting (monthly column 1989-2024). LCGC North America. [link ↗] — John Dolan 35-letnia seria miesięcznych artykułów problemowych
  3. Kromidas, Stavros. 2017. HPLC Made to Measure: A Practical Handbook for Optimization. 2nd ed. Wiley-VCH. ISBN 978-3-527-31377-1. — Praktyczny przewodnik problem-solving dla labs analitycznych
  4. Dolan, John W.. 2013. When to Modify Method Conditions. 192-199. [link ↗] — Decision flow for changing flow rate / temperature / %B vs swapping columns.
  5. Dong, Michael W.. 2019. HPLC and UHPLC for Practicing Scientists. 2nd ed. Wiley. ISBN 978-1-119-31378-3. https://doi.org/10.1002/9781119313793 [link ↗] — Chapter 9 covers troubleshooting modern UHPLC systems (sub-2 µm particles).
  6. Meyer, Veronika R.. 2010. Practical High-Performance Liquid Chromatography. 5th ed. Wiley. ISBN 978-0-470-68218-0. — Solid step-by-step problem isolation chapter (eluents, columns, instruments).
  7. Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. Practical HPLC Method Development. 2nd ed. Wiley. ISBN 978-0-471-00703-6. — Method-development companion volume with troubleshooting cross-refs.
  8. Carr, Peter W.. 2009. The new physical chemistry of HPLC. 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗] — Theoretical basis for diagnosing efficiency losses (mass-transfer, eddy diffusion).
  9. Heyden, Yvan Vander, et al.. 2009. Robustness of pharmaceutical liquid chromatographic methods. 2120-2129. https://doi.org/10.1016/j.jchromb.2008.10.052 [link ↗] — How to diagnose method failures vs. system failures (Plackett-Burman).
  10. Engelhardt, Heinz. 2014. 100 Years of Chromatography. 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5. — Historical context for ghost-peak phenomenology (silica chemistry).
  11. Stoll, Dwight R., and Peter W. Carr. 2017. Two-Dimensional Liquid Chromatography: A State of the Art Tutorial. 519-531. https://doi.org/10.1021/acs.analchem.6b03506 [link ↗]
  12. Carr, Peter W.. 2009. The new physical chemistry of HPLC. 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗]
  13. Wu, Naijun, and Anton M. Clausen. 2007. Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations. 1167-1182. https://doi.org/10.1002/jssc.200700026 [link ↗]
  14. Engelhardt, Heinz. 2014. 100 Years of Chromatography. 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. Probabilistic approach to peak deconvolution in chromatography. 8525-8531. https://doi.org/10.1021/ac101742z [link ↗]
🧪 Solubility and solvent compatibility MolGod_SOLUB_1
Molecule
Aniline
Formula
C6H7N
logP
0.90
Mass (g/mol)
93.13
Polarity
Moderate

⚠️ Compatibility per Hansen parameters (δD/δP/δH) — literature values. Indicative data; verify experimentally.

Solvent Compat. Ra Visual GC-MS HPLC Applications References
Water (H₂O)− Poor34.8
✗ NieA (aqueous) (RP)
buffercell cultureanalyticalhydrophilic extraction
Ethanol (EtOH)− Poor12.3
✗ NieA/B modifier (RP/NP)
extractionspectroscopy (UV-Vis)synthesisHPLC modifier
Methanol (MeOH)− Poor16.5
✗ NieA/B (RP) (RP)
HPLC (eluent)LC-MSKarl FischerUV-transparent do 205 nm
Acetone~ Avg.10.0
✗ NieB modifier (NP)
GC headspacecrystallizationdegreasingsynthesis
Acetonitrile (ACN)− Poor15.8
✗ NieB (RP) (RP)
HPLC eluent (gold standard)LC-MS (wolny cut-off UV 190 nm)peptide analysis
DMSO~ Avg.11.5
✗ NieN/A (N/A)
NMR (d6-DMSO)cell biology (cryopreservation)drug deliverysynthesis
THF+ Good5.7
✗ NieB (NP) (NP)
GPC/SEC (polymer analysis)Grignard synthesisorganometallic
DCM (CH₂Cl₂)+ Good4.9
✓ TakB (NP) (NP)
extractionNP-HPLCGC-MScrystallization (anti-solvent)
Chloroform (CHCl₃)+ Good5.9
✓ TakN/A (toxic) (N/A)
NMR (CDCl3)lipid extraction (Folch method)NP-TLC
Hexane− Poor14.5
✓ TakA (NP) (NP)
NP-HPLCoil extraction (lipids)GC-MSTLC (NP)
Toluene~ Avg.9.4
✓ TakB (NP) (NP)
NMR (d8-toluene)synthesisDean-Stark azeotropic drying
📚 Scientific references for solvents (Chicago Author-Date) — click to expand

11 solvents × 5 independent scientific sources (NIST/CRC/IARC/Hansen/Reichardt/Smallwood/Wypych/Armarego/Snyder/GESTIS). 55+ full citations below.

Water (H₂O)
  1. NIST — NIST Chemistry WebBook — Water (CAS 7732-18-5)
  2. CRC — CRC Handbook of Chemistry and Physics, 104th ed., Sec. 8 (Properties of Water)
  3. IAPWS — IAPWS Release on Static Dielectric Constant of Water
  4. Reichardt 2011 — Solvents and Solvent Effects in Organic Chemistry
  5. GESTIS — GESTIS Substance Database — Water
Ethanol (EtOH)
  1. NIST — NIST Chemistry WebBook — Ethanol (CAS 64-17-5)
  2. CRC — CRC Handbook — Ethanol physical constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — Ethanol eluotropic
  4. Smallwood — Handbook of Organic Solvent Properties — Ethanol
  5. GESTIS — GESTIS Substance Database — Ethanol
Methanol (MeOH)
  1. NIST — NIST Chemistry WebBook — Methanol (CAS 67-56-1)
  2. CRC — CRC Handbook — Methanol physical constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — MeOH eluotropic, eo=0.95
  4. GESTIS — GESTIS Substance Database — Methanol
Acetone
  1. NIST — NIST Chemistry WebBook — Acetone (CAS 67-64-1)
  2. CRC — CRC Handbook — Acetone physical & thermodynamic constants
  3. Hansen 2007 — Hansen Solubility Parameters — Acetone (dD=15.5, dP=10.4, dH=7.0)
  4. Smallwood — Handbook of Organic Solvent Properties — Acetone
  5. GESTIS — GESTIS Substance Database — Acetone
Acetonitrile (ACN)
  1. NIST — NIST Chemistry WebBook — Acetonitrile (CAS 75-05-8)
  2. CRC — CRC Handbook — Acetonitrile constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — ACN gold-standard HPLC eluent
  4. Reichardt 2011 — Solvents and Solvent Effects — ACN dipolar aprotic
  5. GESTIS — GESTIS Substance Database — Acetonitrile
DMSO
  1. NIST — NIST Chemistry WebBook — DMSO (CAS 67-68-5)
  2. Wypych 2019 — Handbook of Solvents Vol. 1 — DMSO comprehensive properties
  3. Hansen 2007 — HSP — DMSO (dD=18.4, dP=16.4, dH=10.2)
  4. Reichardt 2011 — Solvents and Solvent Effects — DMSO E_T(30)=45.1, dipolar aprotic
  5. GESTIS — GESTIS Substance Database — DMSO
THF
  1. NIST — NIST Chemistry WebBook — THF (CAS 109-99-9)
  2. Armarego 2009 — Purification of Laboratory Chemicals — THF drying & peroxide test
  3. Hansen 2007 — Hansen Solubility Parameters — THF (dD=16.8, dP=5.7, dH=8.0)
  4. Smallwood — Handbook of Organic Solvent Properties — THF
  5. GESTIS — GESTIS Substance Database — Tetrahydrofuran
DCM (CH₂Cl₂)
  1. NIST — NIST Chemistry WebBook — Dichloromethane (CAS 75-09-2)
  2. IARC 71 — IARC Monograph 71 — DCM (Group 2A carcinogen)
  3. Hansen 2007 — Hansen Solubility Parameters — DCM (dD=18.2, dP=6.3, dH=6.1)
  4. Reichardt 2011 — Solvents and Solvent Effects — DCM polarity index
  5. GESTIS — GESTIS Substance Database — Dichloromethane
Chloroform (CHCl₃)
  1. NIST — NIST Chemistry WebBook — Chloroform (CAS 67-66-3)
  2. IARC 73 — IARC Monograph 73 — Chloroform (Group 2B carcinogen)
  3. Hansen 2007 — Hansen Solubility Parameters — CHCl3 (dD=17.8, dP=3.1, dH=5.7)
  4. Reichardt 2011 — Solvents and Solvent Effects — CHCl3 H-bond donor strength
  5. GESTIS — GESTIS Substance Database — Chloroform
n-Hexane
  1. NIST — NIST Chemistry WebBook — n-Hexane (CAS 110-54-3)
  2. ATSDR n-Hexane — ATSDR Toxicological Profile for n-Hexane — neuropatia obwodowa (n-Heksan NIE jest kancerogenem IARC)
  3. Hansen 2007 — Hansen Solubility Parameters — n-Hexane (dD=14.9, dP=0, dH=0)
  4. Snyder & Kirkland — Modern Liquid Chromatography — n-Hexane NP standard, eo=0.00
  5. GESTIS — GESTIS Substance Database — n-Hexane
Toluene
  1. NIST — NIST Chemistry WebBook — Toluene (CAS 108-88-3)
  2. IARC 71 — IARC Monograph 71 — Toluene
  3. Hansen 2007 — Hansen Solubility Parameters — Toluene (dD=18.0, dP=1.4, dH=2.0)
  4. Smallwood — Handbook of Organic Solvent Properties — Toluene
  5. GESTIS — GESTIS Substance Database — Toluene
Solubility theory (applied in compatibility prediction):
  1. Yalkowsky, Samuel H., and Shri C. Valvani. 1980. "Solubility and Partitioning I: Solubility of Nonelectrolytes in Water." Journal of Pharmaceutical Sciences 69 (8): 912–922. https://doi.org/10.1002/jps.2600690814 — General Solubility Equation (GSE): logS = 0.5 − logP − 0.01(MP−25).
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. CRC Press. https://doi.org/10.1201/9781420006834 — HSP triplet (dD, dP, dH) + Ra formula.
  3. Stefanis, E., and C. Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." Int J Thermophys 29: 568–585. https://doi.org/10.1007/s10765-008-0415-z
  4. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Wiley-VCH. https://doi.org/10.1002/9783527632220 — E_T(30) polarity scale, solwatochromia.
  5. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Wiley. https://doi.org/10.1002/9780470508183 — Eluotropic series, polarity index.
  6. Van Krevelen, D. W., and K. Te Nijenhuis. 2009. Properties of Polymers. 4th ed. Elsevier. https://doi.org/10.1016/B978-0-08-054819-7.X0001-5 — Hoftyzer–Van Krevelen group contribution dla dD/dP/dH z SMILES.
  7. Marcus, Yizhak. 1998. The Properties of Solvents. Wiley Series in Solution Chemistry, Vol. 4. ISBN 9780471983699 — Complete tabular set of 250+ solvents (ε, μ, donicity, acceptor numbers).
  8. PubChem Compound Database — CAS 62-53-3 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.

Full bibliography in the REFERENCES accordion (at the bottom of the page) — Chicago Manual of Style 17th ed., Author-Date.

📚 Technical FAQ — Aniline (5) MolGod_TECHFAQ_1
❓ Jak przygotować roztwór standardowy aniliny o stężeniu 0,1 mol/L?
Aby przygotować roztwór standardowy aniliny (C6H7N) o stężeniu 0,1 mol/L, należy obliczyć masę substancji potrzebną do sporządzenia 1 litra roztworu. Masa molowa aniliny wynosi 93,13 g/mol. Stężenie 0,1 mol/L oznacza, że w 1 litrze roztworu powinno znajdować się 0,1 mola aniliny. Masa potrzebnej substancji to: 0,1 mol * 93,13 g/mol = 9,313 g. Należy odważyć 9,313 g aniliny i rozpuścić w wodzie destylowanej, a następnie uzupełnić do objętości 1 litra.
Helpful?
❓ Jak przechowywać anilinę, aby zachować jej stabilność?
Anilina powinna być przechowywana w temperaturze pokojowej (15-25°C), z dala od światła słonecznego i źródeł ciepła. Należy ją trzymać w szczelnie zamkniętym pojemniku, najlepiej z ciemnego szkła, aby ograniczyć degradację spowodowaną fotooksydacją. Wilgotność powietrza nie powinna być zbyt wysoka, ale standardowe warunki laboratoryjne są zwykle wystarczające.
Helpful?
❓ Jaka metoda analityczna jest najlepsza do oznaczania stężenia aniliny w roztworze?
Dla aniliny o masie molowej 93,13 g/mol i logP około 4,5 (wartość przybliżona), zalecaną metodą analityczną jest wysokosprawna chromatografia cieczowa (HPLC). Anilina jest związkiem polarnym i umiarkowanie lotnym, co sprawia, że HPLC z odpowiednią fazą stacjonarną (np. C18 lub polarne fazy odwrócone) jest optymalna do jej oznaczania. GC mogłaby być stosowana tylko po odpowiedniej derywatyzacji, co nie jest konieczne w przypadku HPLC.
Helpful?
❓ Jakie są główne reakcje i niezgodności chemiczne aniliny?
Anilina jest podatna na utlenianie, szczególnie w obecności tlenu z powietrza, co prowadzi do powstawania produktów polimeryzacji. Reaguje również z kwasami, tworząc sole (np. chlorek aniliny). Nie należy jej mieszać z silnymi utleniaczami (np. nadmanganianem potasu) ani zasadami w wysokich stężeniach, które mogą prowadzić do niepożądanych reakcji. W roztworach wodnych może ulegać protonacji, tworząc jon anilinowy (C6H7NH+).
Helpful?
❓ W jakich zastosowaniach laboratoryjnych wykorzystuje się anilinę?
Anilina jest szeroko stosowana jako substrat w syntezie organicznej, np. do otrzymywania barwników, leków (np. sulfonamidów) i tworzyw sztucznych. W laboratoriach analitycznych używa się jej jako wzorca w metodach chromatograficznych oraz jako odczynnika w reakcjach chemicznych, np. do oznaczania twardości wody (reakcja z jodkiem potasu). Jest również wykorzystywana w badaniach biologicznych jako związek modelowy do testów toksyczności.
Helpful?
🧮 Laboratory calculators (8) MolGod_LABCALC_1
Dilution (C₁V₁=C₂V₂)
Molarity (M=n/V)
pH Buffer (Henderson-Hasselbalch)
Beer-Lambert (A=εcl)
Mass → Moles
Concentration % → M
ppm → mg/L
Temperature C↔F↔K

Verified formulas: IUPAC Gold Book ↗, DOI ↗

📊 Spectroscopic Databases MolGod_SPECDB_3
📋 Laboratory protocol generator MolGod_PROTOCOL_1

Protocol generated based on: GHS SDS, Aldrich Lab Guide ↗

🏷️ Label generator (QR) MolGod_LABEL_1
Aniline• ANILINE / Benzenamine• CAS: 62-53-3• Formula: C6H7N• Mass: 93.13 g/molDANGERGHS HAZARD STATEMENTS:H351: Suspected of causing cancerH341: Suspected of causing genetic defectsH331: Toxic if inhaledH311: Toxic in contact with skinDH ScientificScience first. Commerce as consequence.Batch No.: Netto Mass: MFG:
ADMET — Pharmacological Profile

Drug-likeness radar chart (Lipinski Ro5 / Veber). Green zone = compliance with criteria.

Predictive data — properties calculated in silico (SMILES/RDKit). These do not replace clinical studies. Do not use for drug evaluation without experimental verification.

MW93.1LogP0.9HBD1HBA1RotB0TPSA26 Ų
✓ Lipinski Ro5✓ Veber✓ Egan✗ Ghose (MW=93)✗ REOS (MW=93)✓ Lead-like Ro3
PropertyValueRating
Absorption (GI)high✓
BBB permeabilityyes (crosses)
Bioavailability (Daina 2017)
55%
CYP450 profileCYP1A2 non-inhibitorCYP2C9 non-inhibitorCYP2C19 non-inhibitorCYP2D6 non-inhibitorCYP3A4 non-inhibitor
PAINS alerts0✓
Brenk alerts0✓
pKa (pH 7.4)4.62 (curated)
hERG (cardiotox.)✓ no
P-gp substrate—
Ames mutagenicity✓ no
DILI (hepatotox.)—
LogS (aq. solub.)—
Sources (ADMET methodology)
  1. Lipinski, Christopher A., Franco Lombardo, Beryl W. Dominy, and Paul J. Feeney. 1997. "Experimental and computational approaches to estimate solubility and permeability in drug discovery and development settings." Advanced Drug Delivery Reviews 23 (1-3): 3-25.
  2. Veber, Daniel F., Stephen R. Johnson, Hung-Yuan Cheng, et al. 2002. "Molecular properties that influence the oral bioavailability of drug candidates." Journal of Medicinal Chemistry 45 (12): 2615-2623.
  3. Daina, Antoine, Olivier Michielin, and Vincent Zoete. 2017. "SwissADME: a free web tool to evaluate pharmacokinetics, drug-likeness and medicinal chemistry friendliness." Scientific Reports 7: 42717.
  4. Egan, William J., and Gregory Lauri. 2002. "Prediction of intestinal permeability." Advanced Drug Delivery Reviews 54 (3): 273-289.
  5. Baell, Jonathan B., and Georgina A. Holloway. 2010. "New substructure filters for removal of pan assay interference compounds (PAINS) from screening libraries." Journal of Medicinal Chemistry 53 (7): 2719-2740.
  6. Brenk, Ruth, Alessandro Schipani, Daniel James, et al. 2008. "Lessons learnt from assembling screening libraries for drug discovery for neglected diseases." ChemMedChem 3 (3): 435-444.
  7. Ertl, Peter, and Ansgar Schuffenhauer. 2009. "Estimation of synthetic accessibility score of drug-like molecules based on molecular complexity and fragment contributions." Journal of Cheminformatics 1: 8.
  8. Bickerton, G. Richard, Gaia V. Paolini, Jérémy Besnard, Sorel Muresan, and Andrew L. Hopkins. 2012. "Quantifying the Chemical Beauty of Drugs." Nature Chemistry 4 (2): 90-98.
  9. Hopkins, Andrew L., and Colin R. Groom. 2002. "The Druggable Genome." Nature Reviews Drug Discovery 1 (9): 727-730.
  10. Ghose, Arup K., Vellarkad N. Viswanadhan, and John J. Wendoloski. 1999. "A Knowledge-Based Approach in Designing Combinatorial or Medicinal Chemistry Libraries for Drug Discovery." Journal of Combinatorial Chemistry 1 (1): 55-68.
  11. Tice, Raymond R., Christopher P. Austin, Robert J. Kavlock, and John R. Bucher. 2013. "Improving the Human Hazard Characterization of Chemicals: A Tox21 Update." Environmental Health Perspectives 121 (7): 756-765.
  12. Leeson, Paul D., and Brian Springthorpe. 2007. "The Influence of Drug-Like Concepts on Decision-Making in Medicinal Chemistry." Nature Reviews Drug Discovery 6 (11): 881-890.
  13. Hann, Michael M. 2011. "Molecular Obesity, Potency and Other Addictions in Drug Discovery." MedChemComm 2 (5): 349-355.
  14. Davies, Mark, Michał Nowotka, George Papadatos, et al. 2015. "ChEMBL Web Services: Streamlining Access to Drug Discovery Data and Utilities." Nucleic Acids Research 43 (W1): W612-W620.
  15. Walters, W. Patrick, and Mark A. Murcko. 2002. "Prediction of 'Drug-Likeness.'". Advanced Drug Delivery Reviews 54 (3): 255–271. https://doi.org/10.1016/S0169-409X(02)00003-0.
  16. Congreve, Miles, Robin Carr, Christopher Murray, and Harren Jhoti. 2003. "A 'Rule of Three' for Fragment-Based Lead Discovery?" Drug Discovery Today 8 (19): 876–877. https://doi.org/10.1016/S1359-6446(03)02831-9.
  17. Brenk, Ruth, Alessandro Schipani, Daniel James, Agata Krasowski, Iain Hugh Gilbert, Julie Frearson, and Paul Graham Wyatt. 2008. "Lessons Learnt from Assembling Screening Libraries for Drug Discovery for Neglected Diseases." ChemMedChem 3 (3): 435-444.
  18. Schomburg, Karen T., Sascha Bietz, Hans Briem, Andrea M. Henzler, Stefan Urbaczek, and Matthias Rarey. 2014. "Facing the Challenges of Structure-Based Target Prediction by Inverse Virtual Screening." Journal of Chemical Information and Modeling 54 (6): 1676-1686.
  19. Bemis, Guy W., and Mark A. Murcko. 1996. "The Properties of Known Drugs. 1. Molecular Frameworks." Journal of Medicinal Chemistry 39 (15): 2887-2893.
  20. Schomburg, Karen T., and Matthias Rarey. 2014. "What Is the Potential of Structure-Based Target Prediction Methods?" Future Medicinal Chemistry 6 (17): 1987-1989.
  21. et al.. (2026). "Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.". https://doi.org/10.3390/ma19101993
  22. et al.. (2026). "Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.". https://doi.org/10.1186/s13065-026-01744-x
  23. et al.. (2026). "Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil Niche Information from Contaminated Sites.". https://doi.org/10.3390/microorganisms14030678
  24. et al.. (2026). "Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.". https://doi.org/10.3390/nano16030165
  25. (2026). "Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.". https://doi.org/10.1021/acsomega.5c06688
  26. et al.. (2025). "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853.". https://doi.org/10.1038/s41598-025-29156-2
  27. et al.. (2025). "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.". https://doi.org/10.1039/d5ra03828f
  28. Hongyan Li, Lianxin Liu, Jianguo Cui et al.. (2020). "High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism". RSC Advances. https://doi.org/10.1039/d0ra01245a
  29. Tianwei He, Chunmei Zhang, Lei Zhang et al.. (2019). "Single Pt atom decorated graphitic carbon nitride as an efficient photocatalyst for the hydrogenation of nitrobenzene into aniline". Nano Research. https://doi.org/10.1007/s12274-019-2439-z
  30. Tarn C. Johnson, Bryony L. Elbert, Alistair J. M. Farley et al.. (2017). "Direct sulfonylation of anilines mediated by visible light". Chemical Science. https://doi.org/10.1039/c7sc03891g
  31. Wenting Wu, Liming Zhang, Shu‐Li You. (2016). "Catalytic asymmetric dearomatization (CADA) reactions of phenol and aniline derivatives". Chemical Society Reviews. https://doi.org/10.1039/c5cs00356c
  32. Hamideh Ahankar, Ali Ramazani, Katarzyna Ślepokura et al.. (2016). "Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation". Green Chemistry. https://doi.org/10.1039/c6gc00157b
  33. Tomohiro Sugahara, Kei Murakami, Hideki Yorimitsu et al.. (2014). "Palladium‐Catalyzed Amination of Aryl Sulfides with Anilines". Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201404355
  34. Irina Sapurina, M. A. Shishov. (2012). "Oxidative Polymerization of Aniline: Molecular Synthesis of Polyaniline and the Formation of Supramolecular Structures". InTech eBooks. https://doi.org/10.5772/48758
  35. Jannis Wenk, Silvio Canonica. (2012). "Phenolic Antioxidants Inhibit the Triplet-Induced Transformation of Anilines and Sulfonamide Antibiotics in Aqueous Solution". Environmental Science & Technology. https://doi.org/10.1021/es300485u
  36. Luana da Silva Magalhães Forezi. (2011). "Aniline (CAS No. 62-53-3)". Revista Virtual de Química. https://doi.org/10.5935/1984-6835.20110053
  37. Xiangchun Meng, Haiyang Cheng, Yoshinari Akiyama et al.. (2009). "Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions". Journal of Catalysis. https://doi.org/10.1016/j.jcat.2009.03.008
  38. D. V. Parke. (1960). "Studies in detoxication. 84. The metabolism of [14C]aniline in the rabbit and other animals". Biochemical Journal. https://doi.org/10.1042/bj0770493
  39. R. A. M. Case, M. E. Hosker, David B. McDonald et al.. (1954). "Tumours Of The Urinary Bladder in Workmen Engaged in the Manufacture and Use Of Certain Dyestuff Intermediates In The British Chemical Industry. Part I. The Role Of Aniline, Benzidine, Alpha-Naphthylamine, And Beta-Naphthylamine". Occupational and Environmental Medicine. https://doi.org/10.1136/oem.11.2.75
  40. et al. 2026. "Confined Oxidative Polymerization of Preorganized Aniline Within Cyclodextrin-Based Bimolecular Tube Nanochannels for the Synthesis of Bispolypseudorotaxanes." DOI: 10.3390/molecules31183353. [DOI ↗]
  41. et al. 2025. "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review." DOI: 10.1039/d5ra03828f. [DOI ↗]
  42. 2008. "Pyrrolidinium aniline-2-sulphonate di(aniline-2-sulphonic acid)." eCrystals - University of Southampton. DOI: 10.3737/ecrystals.chem.soton.ac.uk/561. [DOI ↗]
  43. Evans, J.C. 1960. "The vibrational assignments and configuration of aniline, aniline-NHD and aniline-ND2." Spectrochimica Acta. DOI: 10.1016/0371-1951(60)80037-9. [DOI ↗]
  44. "Automotive fuels - Information on aniline, N-methyl aniline, N-ethyl aniline, N,N di-methyl aniline and secondary-butyl acetate when used as blending components in unleaded petrol." DOI: 10.3403/30406948u. [DOI ↗]
  45. "Automotive fuels - Information on aniline, N-methyl aniline, N-ethyl aniline, N,N di-methyl aniline and secondary-butyl acetate when used as blending components in unleaded petrol." DOI: 10.3403/30406948. [DOI ↗]
  46. "From Neutral Aniline to Aniline Trication: A Computational and Experimental Study." DOI: 10.1021/acs.jpca.0c00686.s001. [DOI ↗]
  47. "Electrochemically Modulated Permeability of Poly(Aniline) and Composite Poly(Aniline)-Poly(Styrenesulfonate) Membranes." DOI: 10.1021/la060255b.s001. [DOI ↗]
  48. "Aniline." DOI: 10.31003/uspnf_r1662_01_01. [DOI ↗]
  49. "Aniline Sulfate." DOI: 10.31003/uspnf_r1283_01_01. [DOI ↗]
  50. Anonymous. "Automotive fuels - Information on aniline, N-methyl aniline, N-ethyl aniline, N,N di-methyl aniline and secondary-butyl acetate when used as blending components in unleaded petrol.". https://doi.org/10.3403/30406948u. [DOI ↗]
  51. Anonymous. "Automotive fuels - Information on aniline, N-methyl aniline, N-ethyl aniline, N,N di-methyl aniline and secondary-butyl acetate when used as blending components in unleaded petrol.". https://doi.org/10.3403/30406948. [DOI ↗]
  52. Anonymous. "From Neutral Aniline to Aniline Trication: A Computational and Experimental Study.". https://doi.org/10.1021/acs.jpca.0c00686.s001. [DOI ↗]
  53. Anonymous. "Electrochemically Modulated Permeability of Poly(Aniline) and Composite Poly(Aniline)-Poly(Styrenesulfonate) Membranes.". https://doi.org/10.1021/la060255b.s001. [DOI ↗]
  54. Anonymous. "Aniline.". https://doi.org/10.31003/uspnf_r1662_01_01. [DOI ↗]
  55. et al. 2026. "2-Chloro-5-(trifluoromethyl)aniline-Derived Schiff Base Palladium(II) Complexes: From Molecular Design to Acute Toxicity Assessment." DOI: 10.1002/open.70315. [DOI ↗]
  56. B. Brinkmann, R. Bartsch, S. Michaelsen et al. 2025. "Aniline – Addendum: Re-evaluation of the BAT value and evaluation of a pregnancy risk group for the BAT value." MAK Collection for Occupational Health and Safety. DOI: 10.34865/bb6253e10_1ad. [DOI ↗]
  57. et al. 2025. "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853." DOI: 10.1038/s41598-025-29156-2. [DOI ↗]
  58. Robinson, Jim, Dr., Woodruff, D. P., Bradley, M. K. (Matthew K.). 2013. "Identifying the Azobenzene/Aniline reaction intermediate on TiO2-(110) : a DFT Study." American Chemical Society. DOI: 10.1021/jp402461g. [DOI ↗]
  59. N. Hudson, G. S. Dotson. 2015. "NIOSH skin notation (SK) profile : Aniline [CAS No. 62-53-3]."
  60. "Aniline - ToxFAQs : CAS # 62-53-3 [Spanish]."
  61. "Aniline - ToxFAQs : CAS # 62-53-3."
  62. Bolton, Evan E., Yanli Wang, Paul A. Thiessen, and Stephen H. Bryant. 2008. "PubChem: Integrated Platform of Small Molecules and Biological Activities." Annual Reports in Computational Chemistry 4: 217-241. [DOI ↗]
  63. Kim, Sunghwan, Jie Chen, Tiejun Cheng, et al. 2023. "PubChem 2023 update." Nucleic Acids Research 51 (D1): D1373-D1380. [DOI ↗]
  64. Kim, Sunghwan, Tiejun Cheng, Jianyong He, Chen Cheng, et al. 2021. "PubChem Protein, Pathway, Reaction, and Disease Specifications." Journal of Cheminformatics 13: 16. [DOI ↗]
  65. Hähnke, Volker D., Sunghwan Kim, and Evan E. Bolton. 2018. "PubChem chemical structure standardization." Journal of Cheminformatics 10: 36. [DOI ↗]
  66. Wang, Yanli, Stephen H. Bryant, Tiejun Cheng, Jiyao Wang, et al. 2017. "PubChem BioAssay: 2017 update." Nucleic Acids Research 45 (D1): D955-D963. [DOI ↗]
  67. Cheng, Tiejun, et al. 2014. "Computation of Octanol-Water Partition Coefficients by Guiding an Additive Model with Knowledge." Journal of Chemical Information and Modeling 54 (3): 793-805. [DOI ↗]
  68. Andrea Hartwig. 2025. "Anilin." MAK Collection for Occupational Health and Safety. DOI: 10.34865/mb6253d10_1ad. [DOI ↗]
  69. B. Brinkmann, R. Bartsch, S. Michaelsen et al. 2025. "Anilin – Addendum: Reevaluierung des BAT-Wertes und Evaluierung einer Schwangerschaftsgruppe zum BAT-Wert." MAK Collection for Occupational Health and Safety. DOI: 10.34865/bb6253d10_1ad. [DOI ↗]
  70. Wilkinson, Mark D., et al. 2016. "The FAIR Guiding Principles for scientific data management and stewardship." Scientific Data 3: 160018. [DOI ↗]
  71. Veber, Daniel F., Stephen R. Johnson, Hung-Yuan Cheng, Brian R. Smith, Keith W. Ward, and Kenneth D. Kopple. 2002. "Molecular Properties That Influence the Oral Bioavailability of Drug Candidates." Journal of Medicinal Chemistry 45 (12): 2615-2623.
  72. Levitt, David. 2024. "Pharmacokinetics/pharmacodynamics of glucocorticoids: modeling the glucocorticoid receptor dynamics and dose/response of commonly prescribed glucocorticoids." ADMET and DMPK. https://doi.org/10.5599/admet.2414. [DOI ↗]
  73. Notario, Dion, Munzir, Angela Marietha, Novella, Yulina, Hananta, Linawati. 2024. "Impact of lactoferrin supplementation on cotrimoxazole pharmacokinetics: A preliminary clinical investigation." ADMET and DMPK. https://doi.org/10.5599/admet.2358. [DOI ↗]
  74. ECHA. 2024. "REACH Guidance." European Chemicals Agency. ↗
  75. Sridharan, Kannan, Al Banna, Rashed, Husain, Aysha. 2021. "Evaluation of pharmacokinetics of warfarin from validated pharmacokinetic-pharmacodynamic model." ADMET and DMPK. https://doi.org/10.5599/admet.909. [DOI ↗]
  76. Cabana, Bernard E.. 1984. "Bioavailability and Pharmacokinetics in Drug Development." Pharmacokinetics: 113-132. https://doi.org/10.1007/978-1-4613-2799-8_12. [DOI ↗]
  77. Groom, Colin R., Ian J. Bruno, Matthew P. Lightfoot, and Suzanna C. Ward. 2016. "The Cambridge Structural Database." Acta Crystallographica Section B 72 (2): 171-179. ↗
🧪 Solution preparation assistant (Smart Prep) MolGod_PREP_2

Enter what you want to prepare — I'll generate an SOP

Examples below — click to insert:
Preset recipes:
📚 Scientific literature overview — CAS 62-53-3MolGod_LITHUB_MAIN
⭐ Key findings (scientific literature) 20 publications
🏆 CAS 62-53-3 — multi-criteria ranking (W12): 30% citations · 20% recency · 20% topic · 15% historical · 15% open access.
  1. #1
    et al. (2026) · Materials
    Why it matters: Recent (2026) · open access
    SCORE 9.45 Mechanism Open Access DOI ↗ PubMed ↗
  2. #2
    Yue Zhang, Zheng Zhang, Jing Yuan et al. (2026) · Molbank
    Why it matters: Recent (2026) · open access
    SCORE 9.45 Analytics Open Access DOI ↗
  3. #3
    et al. (2025) · RSC Advances
    Why it matters: Recent (2025) · open access
    SCORE 7.95 Mechanism Citations: 1 Open Access DOI ↗ PubMed ↗
  4. #4
    et al. (2025) · Scientific Reports
    Why it matters: Recent (2025) · open access
    SCORE 7.15 Mechanism Citations: 1 Open Access DOI ↗ PubMed ↗
  5. #5
    et al. (2026) · ChemistryOpen
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Analytics Open Access DOI ↗ PubMed ↗
  6. #6
    et al. (2026) · Molecules
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Mechanism Open Access DOI ↗ PubMed ↗
  7. #7
    et al. (2026) · BMC Chemistry
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Mechanism Open Access DOI ↗ PubMed ↗
  8. #8
    et al. (2026) · Antioxidants
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Mechanism Open Access DOI ↗ PubMed ↗
  9. #9
    Camil Dali-Youcef; Shrinivas Jahagirdar; Roderick C. Jones (2026)
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Mechanism Open Access DOI ↗
  10. #10
    Alaa Joied Hamad, Sura Hamid Kathim, Lubna Ghalib et al. (2026) · Indonesian Journal of Chemistry
    Why it matters: Recent (2026) · open access
    SCORE 7.05 Mechanism Open Access DOI ↗
  11. #11
    et al. (2026) · Microorganisms
    Why it matters: Recent (2026) · open access
    SCORE 6.25 Mechanism Open Access DOI ↗ PubMed ↗
  12. #12
    Muthuamirthambal Selvaraj, Binduja Panja, Rejila J et al. (2025) · arXiv (2509.08305v1)
    Why it matters: Recent (2025) · open access
    SCORE 6.25 Mechanism Open Access
  13. #13
    Robinson, Jim, Dr., Woodruff, D. P., Bradley, M. K. (Matthew K.) (2013) · American Chemical Society
    Why it matters: Open access
    SCORE 5.86 Mechanism Citations: 7 Open Access DOI ↗
  14. #14
    Andrea Hartwig (2025) · MAK Collection for Occupational Health and Safety
    Why it matters: Recent (2025)
    SCORE 4.9 Pharmacology Citations: 1 DOI ↗ PubMed ↗
  15. #15
    Shi Y; Zhang K (2022) · Molecules (Basel, Switzerland)
    Why it matters: Must-cite (canon)
    SCORE 4.4 Analytics MUST-CITE DOI ↗
  16. #16
    B. Brinkmann, R. Bartsch, S. Michaelsen et al. (2025) · MAK Collection for Occupational Health and Safety
    Why it matters: Recent (2025)
    SCORE 4 Mechanism DOI ↗ PubMed ↗
  17. #17
    B. Brinkmann, R. Bartsch, S. Michaelsen et al. (2025) · MAK Collection for Occupational Health and Safety
    Why it matters: Recent (2025)
    SCORE 4 Mechanism DOI ↗ PubMed ↗
  18. #18
    NIOSH skin notation (SK) profile : Aniline [CAS No. 62-53-3]
    N. Hudson, G. S. Dotson (2015)
    Why it matters: Selected by multi-criteria score (citations + recency + topic + historical + OA).
    SCORE 1.5 Mechanism
  19. #19
    Aniline - ToxFAQs : CAS # 62-53-3 [Spanish]
    Why it matters: Selected by multi-criteria score (citations + recency + topic + historical + OA).
    SCORE 0 Mechanism
  20. #20
    Aniline - ToxFAQs : CAS # 62-53-3
    Why it matters: Selected by multi-criteria score (citations + recency + topic + historical + OA).
    SCORE 0 Mechanism
📈 HPLC gradient — optimizer (LSS) TEMPLATE

Gradient based on PubChem XLogP3 + LSS (Snyder et al. 2010, ch. 9).

  • Column: C18
  • Buffer: phosphate
  • Flow: 1 mL/min
  • logP: 0.9 (PubChem XLogP3)
  • Ramp: 12% → 95% B, 10 min
  • Total analysis time: 23 min
t (min) %A %B flow (mL/min) Comment
0 88 12 1 start (equilibrium)
2 88 12 1 end of initial hold
12 5 95 1 end of LSS ramp
17 5 95 1 column wash
18 88 12 1 return to init
23 88 12 1 re-equilibration
📚 Scientific references (Chicago Author-Date)
  1. Snyder, Lloyd R., John W. Dolan, and Joseph J. Kirkland. 2010. Introduction to Modern Liquid Chromatography. Wiley. — Chapter 9 — gradient elution, LSS theory (cited as Snyder et al. 2010 in tool description).
  2. Schoenmakers, Peter J. 1986. Optimization of Chromatographic Selectivity: A Guide to Method Development. Elsevier. — Numerical optimization of gradient programs.
  3. Snyder, L. R., and J. W. Dolan. 2007. High-Performance Gradient Elution: The Practical Application of the Linear-Solvent-Strength Model. Wiley. — Foundational LSS reference for the %B_init = 5 + 8·logP heuristic implemented here.
  4. Nikitas, Pavlos, and Adrian Pappa-Louisi. 2009. "Retention models for isocratic and gradient elution in reversed-phase liquid chromatography." Journal of Chromatography A 1216: 1737-1755. [DOI ↗] — Modern review of gradient retention models — basis for non-LSS extensions.
  5. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. [DOI ↗]
  6. Dong, Michael W. 2019. HPLC and UHPLC for Practicing Scientists. Wiley. https://doi.org/10.1002/9781119313793. — Modern UHPLC gradient programming, sub-2 µm scaling rules.
  7. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182. [DOI ↗]
  8. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531. [DOI ↗] — Reference for orthogonal gradient design (2D-LC second dimension).
  9. Dolan, John W.. 2013. "When to Modify Method Conditions." LCGC North America 31: 192-199.
  10. Meyer, Veronika R. 2010. Practical High-Performance Liquid Chromatography. Wiley. — Chapter 7 — practical gradient design with isokratyczny scouting.
  11. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531. [DOI ↗]
  12. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. [DOI ↗]
  13. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182. [DOI ↗]
  14. Engelhardt, Heinz. 2014. 100 Years of Chromatography. Wiley-VCH.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531. [DOI ↗]

REST: /wp-json/molgod/v1/hplc/gradient/62-53-3

🌈 Detector + wavelength (UV/Vis) 280 nm
CompoundAniline
λmax280 nm
λmin254 nm
εmax (M⁻¹·cm⁻¹)1,430
Solvent (reference)methanol
Suggested λ280 nm
Recommended detectorUV
AlternativesPDA/DAD, MS, FLD

Data source: Pavia 2014, ch. 5

📚 Scientific references (Chicago Author-Date) 37 refs · 3 baz

METODA Method Bibliography

  1. Skoog, Douglas A., F. James Holler, and Stanley R. Crouch. 2017. "Principles of Instrumental Analysis." 7th ed. Cengage Learning. ISBN 978-1-305-57721-3.
  2. Perkampus, Heinz-Helmut. 1992. "UV-VIS Spectroscopy and Its Applications." Springer. ISBN 978-3-642-77479-9. →
  3. Sadek, Paul C.. 2002. "The HPLC Solvent Guide." 2nd ed. Wiley-Interscience. ISBN 978-0-471-41138-4.
  4. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. "Introduction to Modern Liquid Chromatography." 3rd ed. Wiley. ISBN 978-0-470-16754-0. →
  5. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." 2nd ed. Wiley. ISBN 978-1-119-31378-3. →
  6. Meyer, Veronika R.. 2010. "Practical High-Performance Liquid Chromatography." 5th ed. Wiley. ISBN 978-0-470-68218-0.
  7. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 →
  8. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 →
  9. Kazakevich, Yuri V., and Rosario LoBrutto, eds.. 2007. "HPLC for Pharmaceutical Scientists." Wiley-Interscience. ISBN 978-0-471-68162-4. →
  10. Kim, Sunghwan, et al.. 2023. "PubChem 2023 update." Nucleic Acids Research 51: D1373-D1380 →
  11. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 →
  12. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772 →
  13. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182 →
  14. Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 →

MOLEKUŁA Per-CAS bibliography (live from 13+ databases)

Sources: db:Europe PMC (8) · db:openalex (12)

  1. db:Europe PMC et al.. (2026). "Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.". https://doi.org/10.3390/ma19101993 →
  2. db:Europe PMC et al.. (2026). "Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.". https://doi.org/10.1186/s13065-026-01744-x →
  3. db:Europe PMC et al.. (2026). "Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil Niche Information from Contaminated Sites.". https://doi.org/10.3390/microorganisms14030678 →
  4. db:Europe PMC et al.. (2026). "Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.". https://doi.org/10.3390/nano16030165 →
  5. db:Europe PMC (2026). "Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.". https://doi.org/10.1021/acsomega.5c06688 →
  6. db:Europe PMC et al.. (2025). "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853.". https://doi.org/10.1038/s41598-025-29156-2 →
  7. db:Europe PMC et al.. (2025). "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.". https://doi.org/10.1039/d5ra03828f →
  8. db:openalex Hongyan Li, Lianxin Liu, Jianguo Cui et al.. (2020). "High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism". RSC Advances. https://doi.org/10.1039/d0ra01245a →
  9. db:openalex Tianwei He, Chunmei Zhang, Lei Zhang et al.. (2019). "Single Pt atom decorated graphitic carbon nitride as an efficient photocatalyst for the hydrogenation of nitrobenzene into aniline". Nano Research. https://doi.org/10.1007/s12274-019-2439-z →
  10. db:openalex Tarn C. Johnson, Bryony L. Elbert, Alistair J. M. Farley et al.. (2017). "Direct sulfonylation of anilines mediated by visible light". Chemical Science. https://doi.org/10.1039/c7sc03891g →
  11. db:openalex Wenting Wu, Liming Zhang, Shu‐Li You. (2016). "Catalytic asymmetric dearomatization (CADA) reactions of phenol and aniline derivatives". Chemical Society Reviews. https://doi.org/10.1039/c5cs00356c →
  12. db:openalex Hamideh Ahankar, Ali Ramazani, Katarzyna Ślepokura et al.. (2016). "Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation". Green Chemistry. https://doi.org/10.1039/c6gc00157b →
  13. db:openalex Tomohiro Sugahara, Kei Murakami, Hideki Yorimitsu et al.. (2014). "Palladium‐Catalyzed Amination of Aryl Sulfides with Anilines". Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201404355 →
  14. db:openalex Irina Sapurina, M. A. Shishov. (2012). "Oxidative Polymerization of Aniline: Molecular Synthesis of Polyaniline and the Formation of Supramolecular Structures". InTech eBooks. https://doi.org/10.5772/48758 →
  15. db:openalex Jannis Wenk, Silvio Canonica. (2012). "Phenolic Antioxidants Inhibit the Triplet-Induced Transformation of Anilines and Sulfonamide Antibiotics in Aqueous Solution". Environmental Science & Technology. https://doi.org/10.1021/es300485u →
  16. db:openalex Luana da Silva Magalhães Forezi. (2011). "Aniline (CAS No. 62-53-3)". Revista Virtual de Química. https://doi.org/10.5935/1984-6835.20110053 →
  17. db:openalex Xiangchun Meng, Haiyang Cheng, Yoshinari Akiyama et al.. (2009). "Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions". Journal of Catalysis. https://doi.org/10.1016/j.jcat.2009.03.008 →
  18. db:openalex D. V. Parke. (1960). "Studies in detoxication. 84. The metabolism of [14C]aniline in the rabbit and other animals". Biochemical Journal. https://doi.org/10.1042/bj0770493 →
  19. db:openalex R. A. M. Case, M. E. Hosker, David B. McDonald et al.. (1954). "Tumours Of The Urinary Bladder in Workmen Engaged in the Manufacture and Use Of Certain Dyestuff Intermediates In The British Chemical Industry. Part I. The Role Of Aniline, Benzidine, Alpha-Naphthylamine, And Beta-Naphthylamine". Occupational and Environmental Medicine. https://doi.org/10.1136/oem.11.2.75 →

REST: /wp-json/molgod/v1/hplc/detector/62-53-3

📐 HPLC peak symmetry calculator (USP Tf / As)

Calculate the USP tailing factor (Tf) and asymmetry (As) from the peak half-widths. Enter a (left half-width) and b (right half-width) measured at 5% or 10% of peak height.

📚 References (Chicago Author-Date)
  1. USP General Chapter <621>. 2024. "Chromatography." United States Pharmacopeial Convention. [link ↗] — Defines USP Tailing Factor T = (a+b)/(2a) measured at 5% peak height.
  2. International Council for Harmonisation (ICH). 2023. "Validation of Analytical Procedures Q2(R2)." ICH Expert Working Group. [link ↗] — Tailing factor is a system suitability parameter (Section 6).
  3. Foley, Joe P., and John G. Dorsey. 1983. "Equations for calculation of chromatographic figures of merit for ideal and skewed peaks." Analytical Chemistry 55: 730-737 https://doi.org/10.1021/ac00255a033 [link ↗] — Original asymmetry factor As = b/a at 10% height (Foley & Dorsey 1983).
  4. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. "Introduction to Modern Liquid Chromatography." Wiley. https://doi.org/10.1002/9780470508183 [link ↗] — Chapter 2.4 — peak shape diagnostics and remedies.
  5. Dolan, John W.. 2003. "Peak tailing and resolution." LCGC North America 21: 610-614 [link ↗] — How tailing factor degrades effective resolution.
  6. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 https://doi.org/10.1021/ac101742z [link ↗] — Modern numerical deconvolution for asymmetric peaks.
  7. Kromidas, Stavros. 2017. "HPLC Made to Measure: A Practical Handbook for Optimization." Wiley-VCH. — Practical Tf and As thresholds for routine QC.
  8. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." Wiley. https://doi.org/10.1002/9781119313793 [link ↗]
  9. Meyer, Veronika R.. 2010. "Practical High-Performance Liquid Chromatography." Wiley.
  10. Heyden, Yvan Vander, et al.. 2009. "Robustness of pharmaceutical liquid chromatographic methods." Journal of Chromatography B 877: 2120-2129 https://doi.org/10.1016/j.jchromb.2008.10.052 [link ↗]
  11. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 https://doi.org/10.1021/acs.analchem.6b03506 [link ↗]
  12. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772 https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗]
  13. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182 https://doi.org/10.1002/jssc.200700026 [link ↗]
  14. Engelhardt, Heinz. 2014. "100 Years of Chromatography." Wiley-VCH.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 https://doi.org/10.1021/ac101742z [link ↗]
📊 Resolution and plate count calculator (Rs, N, H)

Calculate the resolution Rs, the number of theoretical plates N and HETP (H) for a pair of HPLC peaks. Enter the retention times, peak widths (at 50% or at the base) and the column length.

📚 References (Chicago Author-Date)
  1. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. "Introduction to Modern Liquid Chromatography." 3rd ed. John Wiley & Sons. ISBN 978-0-470-16754-0. https://doi.org/10.1002/9780470508183 [link ↗] — Chapter 2 covers resolution, plate count and HETP fundamentals (Snyder et al. 2010).
  2. USP General Chapter <621>. 2024. "Chromatography." USP-NF 2024 ed. United States Pharmacopeial Convention. [link ↗] — Defines Rs >= 1.5 acceptance criterion and N calculation methods.
  3. Dolan, John W.. 2003. "How much resolution is enough?." LCGC North America 21: 350-353 [link ↗] — Practical guidance on Rs targets for routine method development.
  4. Van Deemter, J. J., F. J. Zuiderweg, and A. Klinkenberg. 1956. "Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography." Chemical Engineering Science 5: 271-289 https://doi.org/10.1016/0009-2509(56)80003-1 [link ↗] — Origin of N = 5.54·(tr/w0.5)² half-height plate count formulation.
  5. Giddings, J. Calvin. 1965. "Dynamics of Chromatography, Part I: Principles and Theory." Marcel Dekker. ISBN 978-0-8247-1357-7. — Resolution equation Rs = (1/4)·√N·(α-1)/α·k/(1+k) (master equation).
  6. Foley, Joe P., and John G. Dorsey. 1983. "Equations for calculation of chromatographic figures of merit for ideal and skewed peaks." Analytical Chemistry 55: 730-737 https://doi.org/10.1021/ac00255a033 [link ↗] — Skewed-peak corrections to apparent N.
  7. Knox, John H.. 1977. "Practical aspects of LC theory." Journal of Chromatographic Science 15: 352-364 https://doi.org/10.1093/chromsci/15.9.352 [link ↗]
  8. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772 https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗]
  9. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." 2nd ed. Wiley. ISBN 978-1-119-31378-3. https://doi.org/10.1002/9781119313793 [link ↗]
  10. Meyer, Veronika R.. 2010. "Practical High-Performance Liquid Chromatography." 5th ed. Wiley. ISBN 978-0-470-68218-0.
  11. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 https://doi.org/10.1021/acs.analchem.6b03506 [link ↗]
  12. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772 https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗]
  13. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182 https://doi.org/10.1002/jssc.200700026 [link ↗]
  14. Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 https://doi.org/10.1021/ac101742z [link ↗]

Related products

🧪 System Suitability — live calculator (USP <621>)

Enter data from 5–6 injections (areas, tR, tailing, plates) — the calculator computes %RSD and means and checks compliance with USP <621>. You can paste CSV (comma-separated) or edit individual values.

📚 References (Chicago Author-Date)
  1. USP General Chapter <621>. 2024. "Chromatography (System Suitability section)." USP-NF 2024 ed. United States Pharmacopeial Convention. [link ↗] — Defines RSD area < 2%, tailing < 2.0, N > 2000 acceptance criteria.
  2. International Council for Harmonisation (ICH). 2023. "Validation of Analytical Procedures Q2(R2)." ICH Expert Working Group. [link ↗] — Section 5.4 — system suitability is part of method validation.
  3. US Food and Drug Administration (FDA). 2018. "Reviewer Guidance: Validation of Chromatographic Methods." US Food and Drug Administration. [link ↗] — CDER reviewer perspective on chromatographic validation expectations.
  4. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. "Introduction to Modern Liquid Chromatography." 3rd ed. Wiley. — Chapter 2 — system suitability fundamentals (RSD, Tf, N).
  5. Heyden, Yvan Vander, et al.. 2009. "Robustness of pharmaceutical liquid chromatographic methods." — Robustness vs. system suitability — design-of-experiments framework.
  6. Rozet, Eric, et al.. 2013. "Analysis of recent pharmaceutical regulatory documents on analytical method validation."
  7. European Medicines Agency (EMA). 2011. "Guideline on bioanalytical method validation EMEA/CHMP/EWP/192217/2009." EMA. [link ↗] — EMA companion guideline with bioanalytical SS criteria.
  8. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." 2nd ed. Wiley. — UHPLC-specific suitability adjustments (n=5 vs. n=6).
  9. Kazakevich, Yuri V., and Rosario LoBrutto, eds.. 2007. "HPLC for Pharmaceutical Scientists." Wiley-Interscience.
  10. AOAC International. 2016. "Appendix F: Guidelines for Standard Method Performance Requirements." AOAC INTERNATIONAL. [link ↗] — Alternative SS thresholds for food/dietary samples.
  11. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial."
  12. Carr, Peter W.. 2009. "The new physical chemistry of HPLC."
  13. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations."
  14. Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH.
  15. Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography."

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⚗️ Jonizacja w funkcji pH (Henderson-Hasselbalch)MolGod_PHION_1

Typ: Zasada · pKa: 4.62

024681012140%50%100%% zjonizowany% niejonowypH
pH% jonowy% niejonowy
0100.0 %0.0 %
299.8 %0.2 %
480.7 %19.3 %
64.0 %96.0 %
80.0 %100.0 %
100.0 %100.0 %
120.0 %100.0 %
140.0 %100.0 %
Źródła dla tej substancji (7)
  • CRC Handbook 91st ed.
    Lide, David R., ed. 2010. CRC Handbook of Chemistry and Physics. 91st ed. Boca Raton, FL: CRC Press.
  • CRC Handbook 105th ed.
    Haynes, William M., David R. Lide, and Thomas J. Bruno, eds. 2024. CRC Handbook of Chemistry and Physics. 105th ed. Boca Raton, FL: CRC Press.
  • NIST WebBook — link
    Linstrom, Peter J., and William G. Mallard, eds. 2024. NIST Chemistry WebBook. NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology.
  • PubChem CID 6115 — link
    Kim, Sunghwan, Jie Chen, Tiejun Cheng, Asta Gindulyte, Jia He, Siqian He, Qingliang Li, et al. 2023. "PubChem 2023 update." Nucleic Acids Research 51 (D1): D1373-D1380. PubChem CID 6115.
  • ChEMBL CHEMBL538 — link
    Zdrazil, Barbara, Eloy Felix, Fiona Hunter, Emma J. Manners, James Blackshaw, Sybilla Corbett, Marleen de Veij, et al. 2024. "The ChEMBL Database in 2023." Nucleic Acids Research 52 (D1): D1180-D1192. ChEMBL ID CHEMBL538.
  • IUPAC
    Perrin, Douglas D. 1965. Dissociation Constants of Organic Bases in Aqueous Solution. IUPAC. London: Butterworths.
  • NIST
    Goldberg, Robert N., Nand Kishore, and Rebecca Lennen. 2002. "Thermodynamic Quantities for the Ionization Reactions of Buffers." Journal of Physical and Chemical Reference Data 31 (2): 231-370.
Bibliografia metody (Chicago)
  • Henderson, L. J. 1908. "Concerning the Relationship between the Strength of Acids and Their Capacity to Preserve Neutrality." American Journal of Physiology 21 (4): 173-179.
  • Hasselbalch, K. A. 1917. "Die Berechnung der Wasserstoffzahl des Blutes aus der freien und gebundenen Kohlensäure desselben." Biochemische Zeitschrift 78: 112-144.
  • Po, Henry N., and N. M. Senozan. 2001. "The Henderson-Hasselbalch Equation: Its History and Limitations." Journal of Chemical Education 78 (11): 1499-1503.
  • Avdeef, Alex. 2012. "Absorption and Drug Development: Solubility, Permeability, and Charge State." 2nd ed. Wiley.
  • Avdeef, Alex. 2007. "Solubility of sparingly-soluble ionizable drugs." Advanced Drug Delivery Reviews 59 (7): 568-590.
  • Volgyi, Gergely, et al. 2007. "Potentiometric and spectrophotometric pKa determination of water-insoluble compounds." Analytica Chimica Acta 583 (2): 418-428.
  • Fini, Adamo, Giuseppe Fazio, and Giuseppina Feroci. 1997. "Solubility and solubilization properties of non-steroidal anti-inflammatory drugs." Pharmaceutica Acta Helvetiae 70 (4): 305-318.
  • Mauger, John W., Anthony N. Paruta, and Robert J. Gerraughty. 1972. "Solubilities of sulfadiazine, sulfisomidine, and sulfadimethoxine." Journal of Pharmaceutical Sciences 61 (1): 94-97.
  • Lyman, Warren J., William F. Reehl, and David H. Rosenblatt. 1990. "Handbook of Chemical Property Estimation Methods." American Chemical Society.
  • Marcus, Yizhak. 1998. "The Properties of Solvents." Wiley.
  • Serjeant, E. P., and Boyd Dempsey. 1979. Ionisation Constants of Organic Acids in Aqueous Solution. IUPAC Chemical Data Series No. 23. Oxford: Pergamon Press.
  • Perrin, Douglas D. 1965. Dissociation Constants of Organic Bases in Aqueous Solution. IUPAC. London: Butterworths.
  • Goldberg, Robert N., Nand Kishore, and Rebecca Lennen. 2002. "Thermodynamic Quantities for the Ionization Reactions of Buffers." Journal of Physical and Chemical Reference Data 31 (2): 231-370.
  • Haynes, William M., David R. Lide, and Thomas J. Bruno, eds. 2024. CRC Handbook of Chemistry and Physics. 105th ed. Boca Raton, FL: CRC Press.
  • Lide, David R., ed. 2010. CRC Handbook of Chemistry and Physics. 91st ed. Boca Raton, FL: CRC Press.
  • Kim, Sunghwan, Jie Chen, Tiejun Cheng, Asta Gindulyte, Jia He, Siqian He, Qingliang Li, et al. 2023. "PubChem 2023 update." Nucleic Acids Research 51 (D1): D1373-D1380.
  • Knox, Craig, Mike Wilson, Christen M. Klinger, Mark Franklin, Eponine Oler, Alex Wilson, Allison Pon, et al. 2024. "DrugBank 6.0: the DrugBank Knowledgebase for 2024." Nucleic Acids Research 52 (D1): D1265-D1275.
  • Zdrazil, Barbara, Eloy Felix, Fiona Hunter, Emma J. Manners, James Blackshaw, Sybilla Corbett, Marleen de Veij, et al. 2024. "The ChEMBL Database in 2023." Nucleic Acids Research 52 (D1): D1180-D1192.
  • Kanehisa, Minoru, Miho Furumichi, Yoko Sato, Masayuki Kawashima, and Mari Ishiguro-Watanabe. 2023. "KEGG for taxonomy-based analysis of pathways and genomes." Nucleic Acids Research 51 (D1): D587-D592.
  • Linstrom, Peter J., and William G. Mallard, eds. 2024. NIST Chemistry WebBook. NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology.
  • Nelson, David L., and Michael M. Cox. 2017. Lehninger Principles of Biochemistry. 7th ed. New York: W. H. Freeman.
📈 UV-VIS spectrum predictor (200-400 nm) λmax 280 nm MolGod_UVVIS_1
0%25%50%75%100%200250300350400280 nmA = ε·c·lA / Aₘₐₓ (%)
CompoundAniline
λmax280 nm
λmin254 nm
εmax (M⁻¹·cm⁻¹)1,430
Solvent (query)water
Solvent (reference)methanol
Concentration (M)1e-4
Path length (cm)1
Curve FWHM52 nm

Model: Gaussian curve centered at λmax, scaled with the Beer-Lambert law A = ε · c · l. Transmittance T = 10^(-A) · 100%.

📚 Scientific references (Chicago Author-Date)
  1. et al.. (2026). "Regulating the Acidity and Pore Structure of Hβ Zeolite with Citric Acid Concentration for Optimized Aniline Condensation Catalysis.". https://doi.org/10.3390/ma19101993 [DOI]
  2. et al.. (2026). "Synthesis, biological evaluation, molecular docking, molecular dynamics simulation, and ADME studies of novel carbazole-aniline hybrids as cytotoxic agents.". https://doi.org/10.1186/s13065-026-01744-x [DOI]
  3. et al.. (2026). "Construction of a Synthetic Aniline-Degrading Consortium Consisting of Pseudomonas sp. RF and Acidovorax sp. PH Guided by Soil Niche Information from Contaminated Sites.". https://doi.org/10.3390/microorganisms14030678 [DOI]
  4. et al.. (2026). "Aniline Electropolymerization on Indium-Tin Oxide Nanofilms with Different Surface Resistivity: A Comprehensive Study.". https://doi.org/10.3390/nano16030165 [DOI]
  5. (2026). "Elimination of Aniline from Aquatic Solution through Activated Carbon Prepared from Phoenix Dactylifera Kinetic and Thermodynamic Studies.". https://doi.org/10.1021/acsomega.5c06688 [DOI]
  6. et al.. (2025). "Optimization of photochemical decomposition of aniline in aqueous solutions and assessment of effluent toxicity using Pseudomonas aeruginosa ATCC 27853.". https://doi.org/10.1038/s41598-025-29156-2 [DOI]
  7. et al.. (2025). "Traditional and photocatalytic conversion of aniline into azocompounds - a comprehensive experimental and theoretical review.". https://doi.org/10.1039/d5ra03828f [DOI]
  8. Hongyan Li, Lianxin Liu, Jianguo Cui et al.. (2020). "High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism". RSC Advances. https://doi.org/10.1039/d0ra01245a [DOI]
  9. Tianwei He, Chunmei Zhang, Lei Zhang et al.. (2019). "Single Pt atom decorated graphitic carbon nitride as an efficient photocatalyst for the hydrogenation of nitrobenzene into aniline". Nano Research. https://doi.org/10.1007/s12274-019-2439-z [DOI]
  10. Tarn C. Johnson, Bryony L. Elbert, Alistair J. M. Farley et al.. (2017). "Direct sulfonylation of anilines mediated by visible light". Chemical Science. https://doi.org/10.1039/c7sc03891g [DOI]
  11. Wenting Wu, Liming Zhang, Shu‐Li You. (2016). "Catalytic asymmetric dearomatization (CADA) reactions of phenol and aniline derivatives". Chemical Society Reviews. https://doi.org/10.1039/c5cs00356c [DOI]
  12. Hamideh Ahankar, Ali Ramazani, Katarzyna Ślepokura et al.. (2016). "Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation". Green Chemistry. https://doi.org/10.1039/c6gc00157b [DOI]
  13. Tomohiro Sugahara, Kei Murakami, Hideki Yorimitsu et al.. (2014). "Palladium‐Catalyzed Amination of Aryl Sulfides with Anilines". Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201404355 [DOI]
  14. Irina Sapurina, M. A. Shishov. (2012). "Oxidative Polymerization of Aniline: Molecular Synthesis of Polyaniline and the Formation of Supramolecular Structures". InTech eBooks. https://doi.org/10.5772/48758 [DOI]
  15. Jannis Wenk, Silvio Canonica. (2012). "Phenolic Antioxidants Inhibit the Triplet-Induced Transformation of Anilines and Sulfonamide Antibiotics in Aqueous Solution". Environmental Science & Technology. https://doi.org/10.1021/es300485u [DOI]
  16. Luana da Silva Magalhães Forezi. (2011). "Aniline (CAS No. 62-53-3)". Revista Virtual de Química. https://doi.org/10.5935/1984-6835.20110053 [DOI]
  17. Xiangchun Meng, Haiyang Cheng, Yoshinari Akiyama et al.. (2009). "Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions". Journal of Catalysis. https://doi.org/10.1016/j.jcat.2009.03.008 [DOI]
  18. D. V. Parke. (1960). "Studies in detoxication. 84. The metabolism of [14C]aniline in the rabbit and other animals". Biochemical Journal. https://doi.org/10.1042/bj0770493 [DOI]
  19. R. A. M. Case, M. E. Hosker, David B. McDonald et al.. (1954). "Tumours Of The Urinary Bladder in Workmen Engaged in the Manufacture and Use Of Certain Dyestuff Intermediates In The British Chemical Industry. Part I. The Role Of Aniline, Benzidine, Alpha-Naphthylamine, And Beta-Naphthylamine". Occupational and Environmental Medicine. https://doi.org/10.1136/oem.11.2.75 [DOI]
  20. Linstrom, Peter J., and William G. Mallard, eds. 2023. NIST Chemistry WebBook, NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology. [DOI]
  21. Mayerhöfer, Thomas G., Samir Pahlow, and Jürgen Popp. 2020. "The Bouguer-Beer-Lambert Law: Shining Light on the Obscure." ChemPhysChem 21 (18): 2029-2046. [DOI]
  22. Skoog, Douglas A., F. James Holler, and Stanley R. Crouch. 2017. Principles of Instrumental Analysis. 7th ed. Boston: Cengage Learning. ISBN 978-1-305-57721-3.
  23. Lindon, John C., George E. Tranter, and David W. Koppenaal, eds. 2017. "Encyclopedia of Spectroscopy and Spectrometry." 3rd ed. Amsterdam: Academic Press. ISBN 978-0-12-803224-4.
  24. Field, Leslie D., Sev Sternhell, and John R. Kalman. 2013. "Organic Structures from Spectra." 5th ed. Chichester: Wiley. ISBN 978-1-119-96582-6.
  25. Reusch, William. 2013. "Virtual Textbook of Organic Chemistry: Spectroscopy." East Lansing, MI: Michigan State University.
  26. Lampman, Gary M., Donald L. Pavia, George S. Kriz, and James R. Vyvyan. 2010. "Spectroscopy." 4th ed. Belmont, CA: Cengage Learning. ISBN 978-0-495-88992-9.
  27. Kalsi, P. S. 2010. "Spectroscopy of Organic Compounds." 6th ed. New Delhi: New Age International. ISBN 978-81-224-2032-9.
  28. Williams, Dudley H., and Ian Fleming. 2008. "Spectroscopic Methods in Organic Chemistry." 6th ed. London: McGraw-Hill. ISBN 978-0-07-711559-0.
  29. Sadek, Paul C. 2002. The HPLC Solvent Guide. 2nd ed. Hoboken: Wiley. ISBN 978-0-471-41242-2.
  30. Banwell, Colin N., and Elaine M. McCash. 1994. "Fundamentals of Molecular Spectroscopy." 4th ed. London: McGraw-Hill. ISBN 978-0-07-707976-1.
  31. Perkampus, Heinz-Helmut. 1992. UV-VIS Spectroscopy and Its Applications. Berlin: Springer. https://doi.org/10.1007/978-3-642-77479-9.
  32. Fieser, Louis F. 1949. "Extension of Woodward's Rules for Prediction of Conjugated Diene Absorption." Journal of the American Chemical Society 71 (5): 1854-1857. [DOI]
  33. Woodward, Robert B. 1942. "Structure and the Absorption Spectra of Alpha,Beta-Unsaturated Ketones." Journal of the American Chemical Society 64 (1): 72-75. [DOI]
  34. Beer, August. 1852. "Bestimmung der Absorption des rothen Lichts in farbigen Flüssigkeiten." Annalen der Physik und Chemie 86: 78-88. https://doi.org/10.1002/andp.18521620505.
  35. Lambert, Johann Heinrich. 1760. Photometria. Augsburg: Sumptibus Vidae.

📖 Wartość λmax = 280 nm pochodzi z bazy/literatury. Brak niezależnego potwierdzenia krzyżowego (NIST / CrossRef / PubChem) — weryfikacja krzyżowa niedostępna.

REST: /wp-json/molgod/v1/spectra/uv-vis/62-53-3?solvent=water&path_length_cm=1

☣️ Toxicity (LD50 / LC50) GHS Cat 3 — ModerateMolGod_LD50_1
LD50
250 mg/kg
Gatunek / droga
Rat / doustnie
Klasyfikacja
Moderately toxic
Skala GHS (Acute Toxicity, oral, mg/kg bw):
Cat 1 (≤5)
Cat 2 (5–50)
Cat 3 (50–300)
Cat 4 (300–2000)
Cat 5 (2000–5000)

Source: RTECS BW6650000; Klaassen 2018; ATSDR Aniline 2024 (2024). CAS 62-53-3.

LD50/LC50 data are for guidance only; they do not replace the safety data sheet (SDS) or expert toxicological assessment. GHS classification for the oral route (mg/kg bw) per UN GHS, 10th rev. 2023, Annex 1 §3.1.1.

Bibliography (Chicago)
  • Hodge, Harold C., and James H. Sterner. 1949. "Tabulation of toxicity classes." American Industrial Hygiene Association Quarterly 10 (4): 93-96.
  • U.S. EPA. 2024. "ChemView." https://chemview.epa.gov/.
  • United Nations. 2023. "Globally Harmonized System of Classification and Labelling of Chemicals (GHS)." 10th rev. ed. New York: UN.
  • Lipnick, Robert L., et al. 1995. "Comparison of the up-and-down, conventional LD50, and fixed-dose acute toxicity procedures." Food and Chemical Toxicology 33 (3): 223-231.
  • ATSDR. 2024. "Toxicological Profiles." Agency for Toxic Substances and Disease Registry. https://www.atsdr.cdc.gov/.
  • Hayes, Wallace, and Claire L. Kruger, eds. 2014. "Hayes' Principles and Methods of Toxicology." 6th ed. CRC Press.
  • Lewis, Richard J. 2012. "Sax's Dangerous Properties of Industrial Materials." 12th ed. Wiley.
  • IARC. 2024. "Monographs on the Evaluation of Carcinogenic Risks to Humans." International Agency for Research on Cancer (per kryteria klasyfikacji rakotwórczości IARC Group 1/2A/2B).
  • Pohanish, Richard P. 2017. "Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens." 7th ed. Elsevier.
  • Bingham, Eula, Barbara Cohrssen, and Charles H. Powell, eds. 2012. "Patty's Toxicology." 6th ed. Wiley.
  • WHO. 2023. "Recommended Classification of Pesticides by Hazard." World Health Organization (zgodne z UN GHS Annex 1 §3.1.1).
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📚 REFERENCES (Aggregate bibliography, Chicago Author-Date) 107 items

All scientific sources cited in the accordions above for CAS 62-53-3. Format: Chicago Manual of Style 17th ed., Author-Date system.

🗄️ Scientific databases

  1. NIST. 2026. NIST Chemistry WebBook: CAS 62-53-3. Gaithersburg, MD: National Institute of Standards and Technology. https://webbook.nist.gov/cgi/cbook.cgi?ID=62-53-3. (Accessed 2026-11-12.)
  2. AIST. 2026. Spectral Database for Organic Compounds (SDBS): CAS 62-53-3. Tsukuba, Japan: National Institute of Advanced Industrial Science and Technology. https://sdbs.db.aist.go.jp/. (Accessed 2026-11-12.)
  3. PubChem. 2026. PubChem Compound Summary: CAS 62-53-3. Bethesda, MD: National Center for Biotechnology Information (NCBI), National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/#query=62-53-3. (Accessed 2026-11-12.)
  4. ECHA. 2026. C&L Inventory and REACH Registration: CAS 62-53-3. Helsinki: European Chemicals Agency. https://echa.europa.eu/information-on-chemicals/annex-vi-to-clp. (Accessed 2026-11-12.)

📐 Standards / Guidelines

  1. ICH. 2026. "ICH Harmonised Guideline: CAS 62-53-3." Geneva: International Council for Harmonisation. https://database.ich.org/sites/default/files/Q1A%28R2%29%20Guideline.pdf. (Accessed 2026-11-12.)
  2. National Fire Protection Association (NFPA). 2024. "NFPA 30: Flammable and Combustible Liquids Code." NFPA, Quincy, MA. https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=30.
  3. Occupational Safety and Health Administration (OSHA). 2023. "29 CFR 1910.106 — Flammable Liquids." U.S. Department of Labor, Federal Register. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.106.
  4. European Chemicals Agency (ECHA). 2024. "Annex VI to Regulation (EC) No 1272/2008 (CLP) — Harmonised Classification and Labelling." ECHA, Helsinki / Official Journal of the European Union. https://echa.europa.eu/regulations/clp/clp-classification.
  5. European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms — Part 1: Terminology and performance requirements for chemical risks." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=205:110:::::FSP_PROJECT,FSP_ORG_ID:38536,6080&cs=1B0DAA8B85DF42E4A2C70E5D71F0BFA32.
  6. European Committee for Standardization (CEN). 2001. "EN 166:2001 — Personal eye-protection — Specifications." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=CEN:110:0::::FSP_PROJECT:6541&cs=1F1A4E0A78C4DB6A28DBE2E8C29D89DCF.
  7. European Committee for Standardization (CEN). 2009. "EN 14605:2005+A1:2009 — Protective clothing against liquid chemicals — Performance requirements for clothing with liquid-tight (Type 3) or spray-tight (Type 4) connections." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=CEN:110:0::::FSP_PROJECT:21581&cs=1A04A2D3C7CC58E9E6CB58D55F7EBFB7E.
  8. National Institute for Occupational Safety and Health (NIOSH). 2017. "Recommendations for Chemical Protective Clothing: A Companion to the NIOSH Pocket Guide." U.S. Department of Health & Human Services / CDC. https://www.cdc.gov/niosh/ncpc/default.html.
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📖 Books

  1. Rumble, John R., ed. 2019. CRC Handbook of Chemistry and Physics: 100th Edition. Boca Raton, FL: CRC Press. https://hbcp.chemnetbase.com/.
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook, 2nd ed.. Boca Raton, FL: CRC Press. https://www.routledge.com/Hansen-Solubility-Parameters-A-Users-Handbook/Hansen/p/book/9780849372483.
  3. Barton, Allan F. M. 1991. CRC Handbook of Solubility Parameters and Other Cohesion Parameters: 2nd ed.. Boca Raton, FL: CRC Press. https://www.routledge.com/CRC-Handbook-of-Solubility-Parameters-and-Other-Cohesion-Parameters/Barton/p/book/9780849301766.
  4. Connors, Kenneth A., Gordon L. Amidon, and Valentino J. Stella. 1986. Chemical Stability of Pharmaceuticals: A Handbook for Pharmacists, 2nd ed.. New York: Wiley. https://doi.org/10.1002/0471734683.
  5. Urben, Peter G. 2017. Bretherick's Handbook of Reactive Chemical Hazards, 8th Edition. Academic Press / Elsevier, Oxford. https://www.sciencedirect.com/book/9780081010594.

📘 Monographs

  1. IARC. 2026. IARC Monographs on the Identification of Carcinogenic Hazards to Humans: CAS 62-53-3. Lyon, France: International Agency for Research on Cancer, World Health Organization. https://monographs.iarc.who.int/list-of-classifications/. (Accessed 2026-11-12.)

📄 Scientific articles (peer-reviewed)

  1. Stefanis, Emmanuel, and Costas Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." International Journal of Thermophysics 29: 568-585. https://doi.org/10.1007/s10765-008-0415-z.
  2. Stoll, Vincent S., and John S. Blanchard. 1990. "Buffers: Principles and Practice: In Methods in Enzymology, vol. 182." San Diego: Academic Press. https://doi.org/10.1016/0076-6879(90)82008-P.

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