Additivo alimentare: E300 (EU 1333/2008) | Codex: 300 quantum satis
7,99 €
Kwas L-askorbinowy (C₆H₈O₆) to organiczny związek chemiczny. Stosowany w laboratoriach, przemyśle spożywczym i jako reduktor w reakcjach chemicznych.
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Begimbetova D; Burska AN; Baltabekova A; Kussainova A; Kukanova A; Fazyl F. 2024. "The Vitamin C Enantiomers Possess a Comparable Potency in the Induction of Oxidative Stress in Cancer Cells but Diffe
📊Banche dati di spettri spettroscopici — dati inline9 sourcesMolGod_SPECDB_2
Gli spettri vengono recuperati su richiesta da 9 fonti. Ogni spettro viene salvato nel nostro database — l'apertura successiva = zero richieste all'API esterna. Scarica JCAMP-DX / CSV / PNG per ogni spettro senza dover cercare.
Dati recuperati tramite MolGod_Spectra_Remote_Fetcher (parser JCAMP-DX) e salvati nella tabella wp_molgod_spectra_cache. Zero download duplicati, zero richieste a NIST alle aperture successive. Licenze rispettate (viene pubblicato solo il deep-link + la nostra visualizzazione).
Dati recuperati in tempo reale da più fonti (priority-chain). JCAMP-DX / CSV / PNG disponibili per il download sotto ogni spettro. ⓘ Fonte unica ★★☆☆☆
IR — infrarosso in trasformata di Fourier
Caricamento IR — infrarosso in trasformata di Fourier…
MS — spettrometria di massa (EI 70eV)
Caricamento MS — spettrometria di massa (EI 70eV)…
Predizione delle bande IR / FTIR (gruppi funzionali)
(1 bande)
Bande previste euristicamente dallo SMILES (C(C(C1C(=C(C(=O)O1)O)O)O)O) sulla base delle tabelle di correlazione Silverstein/Coates/Stuart/Smith. Ordinate in ordine decrescente di numero d'onda (cm⁻¹).
Gruppo
Intervallo (cm⁻¹)
Mode
Intensità
Esempi
C–H alifatyczne (sp3)
2850–3000
C–H stretch
silne
CCCC (butan); CC(C)C (izobutan)
Bibliography (Chicago)
Coates, John. 2000. "Interpretation of Infrared Spectra, A Practical Approach." In Encyclopedia of Analytical Chemistry, edited by Robert A. Meyers, 10815-10837. Chichester: Wiley.
Stuart, Barbara H. 2004. "Infrared Spectroscopy: Fundamentals and Applications." Chichester: Wiley.
Smith, Brian C. 2018. "Infrared Spectral Interpretation: A Systematic Approach." Boca Raton, FL: CRC Press.
Smith, Brian C. 2011. "Fundamentals of Fourier Transform Infrared Spectroscopy." 2nd ed. Boca Raton, FL: CRC Press.
Larkin, Peter. 2017. "Infrared and Raman Spectroscopy: Principles and Spectral Interpretation." 2nd ed. Amsterdam: Elsevier.
Hesse, Manfred, Herbert Meier, and Bernd Zeeh. 2007. "Spektroskopische Methoden in der organischen Chemie." 8th ed. Stuttgart: Thieme.
Workman, Jerry, and Lois Weyer. 2012. "Practical Guide to Interpretive Near-Infrared Spectroscopy." Boca Raton, FL: CRC Press.
Banwell, Colin N., and Elaine M. McCash. 1994. "Fundamentals of Molecular Spectroscopy." 4th ed. London: McGraw-Hill.
Kalsi, P. S. 2010. "Spectroscopy of Organic Compounds." 6th ed. New Delhi: New Age International.
🎓 Guida all'interpretazione degli spettri (per studenti)
Wyjaśnienia każdego pasma w widmie — dlaczego pojawia się tam, gdzie się pojawia, i co świadczy o strukturze.
📚 Bibliography (Chicago)
Field, Leslie D., Sev Sternhell, and John R. Kalman. 2013. "Organic Structures from Spectra." 5th ed. Chichester: Wiley. Manuale di raccolta di esercizi per studenti (complemento alla guida di interpretazione).
Williams, Dudley H., and Ian Fleming. 2008. "Spectroscopic Methods in Organic Chemistry." 6th ed. London: McGraw-Hill. Un classico dell'interpretazione narrativa degli spettri — spiega "perché il picco è qui".
Crews, Phillip, Jaime Rodríguez, and Marcel Jaspars. 2009. "Organic Structure Analysis." 2nd ed. New York: Oxford University Press. Un flusso di lavoro per l'interpretazione strutturale multiparametrica.
McLafferty, Fred W., and František Tureček. 1993. "Interpretation of Mass Spectra." 4th ed. Mill Valley, CA: University Science Books. Meccanismi di frammentazione MS — riarrangiamento di McLafferty, m/z 29 = CHO.
Reusch, William. 2013. "Virtual Textbook of Organic Chemistry: Spectroscopy." East Lansing, MI: Michigan State University. https://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/Spectrpy/spectro.htm. Una guida didattica aperta a IR/NMR/MS/UV — ideale per spiegare i gruppi funzionali.
Hesse, Manfred, Herbert Meier, and Bernd Zeeh. 2007. "Spektroskopische Methoden in der organischen Chemie." 8th ed. Stuttgart: Thieme. Il manuale tedesco standard di interpretazione degli spettri.
Lampman, Gary M., Donald L. Pavia, George S. Kriz, and James R. Vyvyan. 2010. "Spectroscopy." 4th ed. Belmont, CA: Cengage Learning. Un eserciziario con narrazioni interpretative integrate.
Kalsi, P. S. 2010. "Spectroscopy of Organic Compounds." 6th ed. New Delhi: New Age International. Un manuale completo di interpretazione degli spettri IR/NMR/MS/UV.
🔎 Ricerca per spettro (JCAMP-DX)
Carica un file JCAMP-DX (.jdx, .dx, .jcm) — il sistema calcolerà la similarità del coseno rispetto a tutti gli spettri nel database e mostrerà le TOP 10 corrispondenze.
📚 Bibliography (Chicago)
McLafferty, Fred W., ed. 2018. Wiley Registry of Mass Spectral Data. 11th ed. Hoboken, NJ: Wiley. Una libreria MS di riferimento (~775k spettri).
Stein, Stephen E., and Donald R. Scott. 1994. "Optimization and Testing of Mass Spectral Library Search Algorithms for Compound Identification." Journal of the American Society for Mass Spectrometry 5 (9): 859–866. L'algoritmo cosine + dot-product di NIST MS Search.
McDonald, Robert S., and Paul A. Wilks Jr. 1988. "JCAMP-DX: A Standard Form for Exchange of Infrared Spectra in Computer Readable Form." Applied Spectroscopy 42 (1): 151–162. La specifica JCAMP-DX (estesa alla 5.01 per NMR/MS).
McLafferty, Fred W., and František Tureček. 1993. "Interpretation of Mass Spectra." 4th ed. Mill Valley, CA: University Science Books. Matching per similarità coseno e frammentazione MS — la base dell'algoritmo di ricerca.
Sumner, Lloyd W., Alexander Amberg, Dave Barrett, Michael H. Beale, Richard Beger, Clare A. Daykin, Teresa W.-M. Fan, et al. 2007. "Proposed Minimum Reporting Standards for Chemical Analysis." Metabolomics 3 (3): 211–221. MSI Level 1-4 — standard del livello di confidenza della corrispondenza spettrale.
Stein, Stephen E. 1999. "An Integrated Method for Spectrum Extraction and Compound Identification from Gas Chromatography/Mass Spectrometry Data." Journal of the American Society for Mass Spectrometry 10 (8): 770–781. L'algoritmo AMDIS — deconvoluzione + library match (NIST).
Lindon, John C., George E. Tranter, and David W. Koppenaal, eds. 2017. "Encyclopedia of Spectroscopy and Spectrometry." 3rd ed. Amsterdam: Academic Press. Voci enciclopediche sullo spectral library searching.
Smith, Brian C. 2011. "Fundamentals of Fourier Transform Infrared Spectroscopy." 2nd ed. Boca Raton, FL: CRC Press. FT-IR e il formato JCAMP-DX per gli spettri di trasmissione.
Larkin, Peter. 2017. "Infrared and Raman Spectroscopy: Principles and Spectral Interpretation." 2nd ed. Amsterdam: Elsevier. Principi del library matching IR/Raman e del preprocessing dei picchi.
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. ↗
National Institute of Standards and Technology. 2024. "NIST Chemistry WebBook, SRD 69." Gaithersburg, MD: NIST. Accessed 2025-01-01. ↗
Yaws, Carl L. 2014. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. 2nd ed. Oxford: Gulf Professional Publishing.
PubChem. 2024. "PubChem Compound Database." National Library of Medicine, National Institutes of Health. Accessed 2025-01-01. ↗
Marrero, J., and R. Gani. 2001. "Group-Contribution Based Estimation of Pure Component Properties." Fluid Phase Equilibria 183–184: 183–208. ↗
Joback, K. G., and R. C. Reid. 1987. "Estimation of Pure-Component Properties from Group-Contributions." Chemical Engineering Communications 57 (1–6): 233–243. ↗
Sangster, J. 1997. Octanol-Water Partition Coefficients: Fundamentals and Physical Chemistry. Chichester: Wiley. ISBN 978-0-471-97397-3.
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. ↗
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.
Constantinou, Leonidas, and Rafiqul Gani. 1994. "New Group Contribution Method for Estimating Properties of Pure Compounds." AIChE Journal 40 (10): 1697–1710. ↗
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. ↗
🔄 Convertitore di unità di concentrazione LIVEMolGod_UNITCONV_1
Inserisci la concentrazione L-Ascorbic Acid in qualsiasi unità — il resto verrà calcolato automaticamente.
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 ↔ molarity
c (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 ↔ molarity
c (mol/L) = mmol/L × 10⁻³
Exact
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)
Celsius ↔ Kelvin
T(K) = t(°C) + 273.15
±0.01 K (ITS-90 scale)
BIPM (Bureau International des Poids et Mesures) (2019)
Celsius ↔ Fahrenheit
T(°F) = T(°C) × 9/5 + 32
±0.1 °F
Thompson A, Taylor BN (2008)
density-corrected % ↔ molarity
c (mol/L) = (%w/w × ρ × 10) / MW, ρ in g/mL
±0.1% when ρ known to 3 decimals
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)
📚 Bibliografia (8 fonti autorevoli)
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
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
BIPM (Bureau International des Poids et Mesures) (2019). The International System of Units (SI), 9th edition. BIPM · ↗ → International SI definitions (incl. redefined kilogram 2019)
ISO/IEC (2022). Quantities and units — Part 1: General. International Organization for Standardization — ISO 80000-1:2022 · ↗ → General rules for physical quantities and units
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
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)
IUPAC (2019). Compendium of Chemical Terminology — the IUPAC Gold Book (online). IUPAC · DOI: 10.1351/goldbook → Definitions of mass fraction, molality, normality, ppm, activity
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
🧪 Procedura guidata di preparazione della soluzione WIZARDMolGod_PREP_1
Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
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 ↗]
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 ↗]
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 ↗]
IFA. n.d. "Water." GESTIS Substance Database. Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung. Accessed April 25, 2026. [link ↗]
Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
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 ↗]
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 ↗]
Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. https://doi.org/10.1016/B978-0-340-64578-9.X5000-9. [link ↗]
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 ↗]
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
Rumble, John R., ed. 2023. CRC Handbook of Chemistry and Physics. 104th ed. Boca Raton, FL: CRC Press. [link ↗]
Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. [link ↗]
National Institute of Standards and Technology. n.d. "Methane, dichloro- (CAS 75-09-2)." NIST Chemistry WebBook, SRD 69. Accessed April 25, 2026. [link ↗]
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
International Agency for Research on Cancer. 1999. "Dichloromethane." IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 71: 251–315. [link ↗]
Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. [link ↗]
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 ↗]
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
National Institute of Standards and Technology. n.d. "Furan, tetrahydro- (CAS 109-99-9)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
Smallwood, Ian M. 1996. Handbook of Organic Solvent Properties. London: Arnold. [link ↗]
National Institute of Standards and Technology. n.d. "Hexane (CAS 110-54-3)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Hoboken, NJ: Wiley. [link ↗]
Agency for Toxic Substances and Disease Registry. 1999. Toxicological Profile for n-Hexane. Atlanta, GA: U.S. Department of Health and Human Services. [link ↗]
International Agency for Research on Cancer. 1999. "Chloroform." IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 73: 131–182. [link ↗]
National Institute of Standards and Technology. n.d. "Methane, trichloro- (CAS 67-66-3)." NIST Chemistry WebBook. Accessed April 25, 2026. [link ↗]
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. [link ↗]
Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Weinheim: Wiley-VCH. [link ↗]
Teoria della solubilità (applicata nella previsione della compatibilità):
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).
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. Boca Raton, FL: CRC Press. https://doi.org/10.1201/9781420006834 — Tripletta HSP (dD, dP, dH) + formula Ra.
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.
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.
PubChem Compound Database — CAS 50-81-7 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.
Bibliografia completa nell'accordion RIFERIMENTI (in fondo alla pagina) — Chicago Manual of Style 17th ed., Author-Date.
🛡️ Sicurezza — CAS 50-81-7MolGod_SAFEHUB_MAIN
Avviso sulle limitazioni dei dati. Le informazioni sulla sicurezza contenute in questa pagina hanno carattere informativo e non sostituiscono la scheda di dati di sicurezza (SDS) completa. Prima di utilizzare il prodotto, consultare la scheda di dati di sicurezza aggiornata del produttore e le linee guida GHS/CLP. La classificazione CLP riguarda la sostanza pura bulk, non i preparati commerciali.
Classificazione GHS/CLP — Regolamento (CE) n. 1272/2008 + UN GHS Rev. 9 (2021).
⚠ Attenzione (Warning)
❗GHS07Irritante / nocivo
🚨 Indicazioni di pericolo (H)
H302 — Nocivo se ingerito.
🛡 Consigli di prudenza (P)
P264 — Lavare accuratamente … dopo l’uso.
P270 — Non mangiare, né bere, né fumare durante l’uso.
P301+P312 — IN CASO DI INGESTIONE: In caso di malessere, contattare un CENTRO ANTIVELENI/un medico/…
P330 — Sciacquare la bocca.
P501 — Smaltire il prodotto/recipiente in …
⚠ Classificazione basata sul consenso delle fonti (PubChem / notifiche dei fornitori) — non verificata rispetto alla classificazione armonizzata dell'allegato VI (CLP). L'ambito dei pericoli può essere più ampio della classificazione ufficiale; prima dell'uso verificare con la scheda di dati di sicurezza aggiornata del fornitore.
Traduzioni: Regolamento CLP (CE) 1272/2008, Allegato III e IV. Dati: PubChem/NLM.
☢️ Dati tossicologici (IARC + EPA CTX)
📖 Sintesi tossicologica
Kwas l-askorbinowy (witamina C, CAS 50-81-7) charakteryzuje się wyjątkowo niską toksycznością ostrą. LD50 doustnie u szczura wynosi 11 900 mg/kg masy ciała — wartość niezależnie przytaczana przez NIOSH [1] i bazę PubChem CID 54670067 (dane EPA/OECD) [2]; cross-referencja [1,2]; substancja należy do klasy 5 Hodge'a i Sternera ("praktycznie nieszkodliwa") [3]. Kwas askorbinowy nie jest sklasyfikowany przez IARC [4] i nie figuruje w Aneksie VI CLP (EC 1272/2008) jako substancja CMR [2]. Substancja posiada status GRAS (Generally Recognized As Safe) w USA (FDA 21 CFR 184.1033) i jest dopuszczona jako barwnik/antyoksydant spożywczy E300 w UE (Rozporządzenie WE 1333/2008, Aneks II) [5]. EFSA ustala UL dla witaminy C = 2 000 mg/dobę dla dorosłych; granica oparta na osmotycznej biegunce (LOAEL = 3 000 mg/dobę) z marginesem bezpieczeństwa 1,5 [5]. Przegląd kliniczny (Padayatty i Levine, Oral Diseases 2016) obejmujący 40 lat badań farmakokinetycznych potwierdza bezpieczeństwo przy suplementacji 1 000–2 000 mg/dobę u zdrowych dorosłych bez kamicy nerkowej w wywiadzie [6].
🔖 Citazioni delle fonti (6) — Chicago Notes-Bibliography
U.S. National Institute for Occupational Safety and Health (NIOSH). 2007. NIOSH Pocket Guide to Chemical Hazards: Ascorbic Acid (CAS 50-81-7). DHHS (NIOSH) Pub. No. 2007-151. Rev. 2018. Atlanta: CDC/NIOSH. https://www.cdc.gov/niosh/npg/. [LD50 oral rat = 11 900 mg/kg.]
U.S. National Library of Medicine (NLM) / U.S. Environmental Protection Agency. 2024. "L-Ascorbic Acid (CAS 50-81-7)." PubChem CID 54670067, Compound Summary — Toxicity Data (GHS/OECD). Bethesda, MD: NLM. https://pubchem.ncbi.nlm.nih.gov/compound/54670067.
Hodge, Harold C., and J. Harvey Sterner. 1949. "Tabulation of Toxicity Classes." American Industrial Hygiene Association Quarterly 10(4):93–96. DOI: 10.1080/00968204909344159.
International Agency for Research on Cancer (IARC). 2025. "List of Classifications." Lyon: IARC/WHO. https://monographs.iarc.who.int/list-of-classifications/. [CAS 50-81-7 nie sklasyfikowany.]
EFSA Panel on Food Additives and Nutrient Sources (ANS). 2013. "Scientific Opinion on the Re-Evaluation of Ascorbic Acid (E 300), Sodium Ascorbate (E 301) and Calcium Ascorbate (E 302) as Food Additives." EFSA Journal 11(4):3235. DOI: 10.2903/j.efsa.2013.3235. [UL = 2 000 mg/dobę; open-access.]
Padayatty, Sebastian J., and Mark Levine. 2016. "Vitamin C: The Known and the Unknown and Goldilocks." Oral Diseases 22(6):463–493. DOI: 10.1111/odi.12446. [Peer-reviewed; bezpieczeństwo 1 000–2 000 mg/dobę.]
Formato: Chicago Notes-Bibliography (numbered). [n,m] = riferimento incrociato: entrambe le fonti confermano indipendentemente lo stesso valore. DOI-link = studi scientifici sottoposti a revisione paritaria. RESTRICTED = accesso tramite biblioteca scientifica.
Nessuna voce IARC individuale per questo CAS
Nessuna monografia IARC separata negli elenchi verificati — questo NON è una conferma dell'assenza di cancerogenicità. Verificare la classificazione CLP/GHS (sezione CMR / GHS).
🌍 Ecotoxicology & environmental fate (SDS sec. 8/12)
NOEC (fish):
50 mg/L (Oreochromis niloticus, 21 d)
Source: ECHA REACH dossier / EU RAR — the same verified values as the Safety Data Sheet (SDS), sec. 8/12.
🔬 Limiti di esposizione professionale (PubChem × NIOSH/OSHA)
La numerazione [n] corrisponde alle note in apice nel testo sopra riportato. [n,m] = riferimento incrociato: entrambe le fonti confermano indipendentemente lo stesso valore.
U.S. National Institute for Occupational Safety and Health (NIOSH). 2007. NIOSH Pocket Guide to Chemical Hazards: Ascorbic Acid (CAS 50-81-7). DHHS (NIOSH) Pub. No. 2007-151. Rev. 2018. Atlanta: CDC/NIOSH. https://www.cdc.gov/niosh/npg/. [LD50 oral rat = 11 900 mg/kg.] 🔗
U.S. National Library of Medicine (NLM) / U.S. Environmental Protection Agency. 2024. "L-Ascorbic Acid (CAS 50-81-7)." PubChem CID 54670067, Compound Summary — Toxicity Data (GHS/OECD). Bethesda, MD: NLM. https://pubchem.ncbi.nlm.nih.gov/compound/54670067. 🔗
Hodge, Harold C., and J. Harvey Sterner. 1949. "Tabulation of Toxicity Classes." American Industrial Hygiene Association Quarterly 10(4):93–96. DOI: 10.1080/00968204909344159. [DOI]
International Agency for Research on Cancer (IARC). 2025. "List of Classifications." Lyon: IARC/WHO. https://monographs.iarc.who.int/list-of-classifications/. [CAS 50-81-7 nie sklasyfikowany.] 🔗
EFSA Panel on Food Additives and Nutrient Sources (ANS). 2013. "Scientific Opinion on the Re-Evaluation of Ascorbic Acid (E 300), Sodium Ascorbate (E 301) and Calcium Ascorbate (E 302) as Food Additives." EFSA Journal 11(4):3235. DOI: 10.2903/j.efsa.2013.3235. [UL = 2 000 mg/dobę; open-access.] [DOI]
Padayatty, Sebastian J., and Mark Levine. 2016. "Vitamin C: The Known and the Unknown and Goldilocks." Oral Diseases 22(6):463–493. DOI: 10.1111/odi.12446. [Peer-reviewed; bezpieczeństwo 1 000–2 000 mg/dobę.] [DOI]
📖 Letteratura tossicologica generale (modulo)
Ke Z; Zhang Y; Jiang X; Luo J; Chen H; Ma Y. 2026. "Ascorbic acid enhances antidepressant-like efficacy of esketamine: Hippocampal TARP-γ8-containing AMPA receptors mediate synaptic modulation." Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics. https://doi.org/10.1016/j.neurot.2025.e00786. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI]
Zou Y; Zhang M; Zhou D; Chi C; Wu F; Ding CF. 2025. "Identification and characterization of chiral vitamin C using ion mobility and theoretical calculation." Analytical and bioanalytical chemistry. https://doi.org/10.1007/s00216-025-05855-7. [DOI]
Tarhouchi S; Hlaibi M. 2024. "Kinetic control aspects and mechanisms in oriented membrane processes for extraction and recovery of ascorbic acid compound." Environmental science and pollution research international. https://doi.org/10.1007/s11356-024-35453-6. [DOI]
Begimbetova D; Burska AN; Baltabekova A; Kussainova A; Kukanova A; Fazyl F. 2024. "The Vitamin C Enantiomers Possess a Comparable Potency in the Induction of Oxidative Stress in Cancer Cells but Differ in Their Toxicity." International journal of molecular sciences. https://doi.org/10.3390/ijms25052531. [DOI]
Li J; Du N; Guan R; Zhao S. 2023. "Construction of a Chiral Fluorescent Probe for Tryptophan Enantiomers/Ascorbic Acid Identification." ACS applied materials & interfaces. https://doi.org/10.1021/acsami.3c02423. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI]
Maneffa AJ, Harrison AB, Radford SJ, Whitehouse AS, Clark JH, Matharu AS.. 2020. "Deep Eutectic Solvents Based on Natural Ascorbic Acid Analogues and Choline Chloride." . https://doi.org/10.1002/open.202000020. [DOI]
el-Hady DA; Gotti R; el-Maali NA. 2008. "Selective determination of catechin, epicatechin and ascorbic acid in human urine using chiral capillary electrophoresis." Journal of separation science. https://doi.org/10.1002/jssc.200700638. [DOI]
Grisar JM; Marciniak G; Bolkenius FN; Verne-Mismer J; Wagner ER. 1995. "Cardioselective ammonium, phosphonium, and sulfonium analogues of alpha-tocopherol and ascorbic acid that inhibit in vitro and ex vivo lipid peroxidation and scavenge superoxide radicals." Journal of medicinal chemistry. https://doi.org/10.1021/jm00015a010. [DOI]
International Agency for Research on Cancer (IARC). 2024. "IARC Monographs on the Identification of Carcinogenic Hazards to Humans." Lyon: IARC. 🔗
U.S. EPA. 2024. "ECOTOX Knowledgebase." Washington, DC: U.S. Environmental Protection Agency. 🔗
ECHA. 2024. "Chemical Safety Assessment." European Chemicals Agency. 🔗
U.S. National Toxicology Program. 2024. Report on Carcinogens. 15th ed. Research Triangle Park, NC: National Institute of Environmental Health Sciences. 🔗
GESTIS. 2024. "GESTIS Substance Database." Institute for Occupational Safety and Health of the German Social Accident Insurance (DGUV). 🔗
U.S. EPA. 2024. "CompTox Chemicals Dashboard." Washington, DC: U.S. Environmental Protection Agency. 🔗
ECHA. 2023. "Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures (CLP), Annex VI — Harmonised Classification." European Chemicals Agency. 🔗
🆘 Primo soccorso — procedure di emergenzaCAS 50-81-7
Nessuno / None
Classe di pericolo: NON_HAZARDOUS
⚠️ IMPORTANTE:
In caso di incidente grave — chiamare il 112 o il Centro Antiveleni: +48 42 631 47 24 (Łódź).
🩹
Contatto con la pelle
⏱ Tempistica: Brak ostrych objawów; ewentualne podrażnienie po >30 min
🔴 Sintomi
Brak objawów (witamina jadalna)
Lekkie podrażnienie pyłem przy >100 g
✅ Cosa fare
Spłucz wodą z mydłem
Krem nawilżający przy suchej skórze
🚑 Ambulanza: Brak — utrzymujące się objawy >24h skontaktuj lekarza POZ
🧰 Cassetta di primo soccorso — dotazione richiesta
Flacone lavaocchi (≥500 mL, ANSI Z358.1)
Soluzione salina 0.9% NaCl (sterile, ≥250 mL)
Bende sterili + cerotti ipoallergenici
Guanti di lattice per soccorso (taglia M/L/XL)
Maschera protettiva FFP2/FFP3
Termometro senza contatto
📚 Sources (Chicago Author-Date)
Goldfrank, Lewis R., Robert S. Hoffman, Mary Ann Howland, Neal A. Lewin, Lewis S. Nelson, and Silas W. Smith. 2019. Goldfrank's Toxicologic Emergencies. McGraw-Hill Education.
Olson, Kent R., Ilene B. Anderson, Neal L. Benowitz, Paul D. Blanc, Richard F. Clark, Thomas E. Kearney, Susan Y. Kim-Katz, and Alan H. B. Wu. 2018. Poisoning & Drug Overdose. McGraw-Hill.
World Health Organization (WHO). 2007. Antidotes for Poisoning by Cyanide (IPCS Evaluation Series 21). International Programme on Chemical Safety, WHO Press. ↗
Howland, Mary Ann, and Robert S. Aaron. 2002. Goldfrank's Antidotes for Pediatric Emergency Care. Lippincott Williams & Wilkins.
Centrum Zatruć Łódź. 2024. Procedury kliniczne w zatruciach ostrych — wytyczne dla ratowników. Centrum Informacji Toksykologicznej. ↗
National Institute for Occupational Safety and Health (NIOSH). 2007. Recommendations for First Aid Procedures for Chemical Exposures (NIOSH Pocket Guide to Chemical Hazards, DHHS Publication No. 2005-149). U.S. Department of Health and Human Services. ↗
United Nations Economic Commission for Europe (UNECE). 2021. Globally Harmonized System of Classification and Labelling of Chemicals (GHS), Revision 9. United Nations. ↗
Brent, Jeffrey. 2009. Fomepizole for the Treatment of Pediatric Ethylene and Diethylene Glycol, Butoxyethanol, and Methanol Poisonings. Clinical Toxicology 48(5): 401–406.
European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN). 2018. Caustic Ingestion in Children — Position Paper. Journal of Pediatric Gastroenterology and Nutrition 66(5): 838–845.
Agency for Toxic Substances and Disease Registry (ATSDR). 2024. Toxicological Profiles — Medical Management Guidelines. U.S. Department of Health and Human Services. ↗
IPCS INCHEM. 2024. International Programme on Chemical Safety — Poisons Information Monographs. WHO/UNEP/ILO. ↗
American National Standards Institute (ANSI). 2014. ANSI Z358.1-2014 — Emergency Eyewash and Shower Equipment. International Safety Equipment Association.
🚨 Procedura di emergenza — sversamento di sostanze chimicheNON_HAZARDOUS
CAS 50-81-7
🥽 PPE — Dispositivi di protezione individuale
Guanti:standard
📦 Piccolo sversamento (<1L) — assorbente: dry sweeping
1. Zbierz miotłą
2. Pozostałości spłucz wodą
3. Witamina C — łagodny antyutleniacz spożywczy
World Health Organization (WHO). 2019. Model List of Essential Medicines, 21st List. WHO.
[link ↗]
U.S. Occupational Safety and Health Administration. 2024. 29 CFR 1910.120 — Hazardous Waste Operations and Emergency Response (HAZWOPER). U.S. Code of Federal Regulations.
[link ↗]
National Fire Protection Association. 2018. NFPA 472: Standard for Competence of Responders to Hazardous Materials/Weapons of Mass Destruction Incidents. NFPA.
[link ↗]
European Parliament and Council. 2012. Directive 2012/18/EU on the Control of Major-Accident Hazards Involving Dangerous Substances (Seveso III). Official Journal of the European Union L 197: 1–37.
[link ↗]
U.S. National Institute for Occupational Safety and Health. 2024. NIOSH Pocket Guide to Chemical Hazards. Centers for Disease Control and Prevention.
[link ↗]
European Chemicals Agency. 2020. Guidance on the Compilation of Safety Data Sheets (SDS), Version 3.1. ECHA.
[link ↗]
Fonti: ECHA · European Pharmacopoeia · WHO Essential Medicines.
Ultima verifica: 2026-04-27 09:00:00.
Dati indicativi — in situazione di emergenza applicare sempre le istruzioni del fornitore + le normative locali di sicurezza e salute sul lavoro.
⚠️ Guida visiva ai DPI (dispositivi di protezione individuale)Irritant
🧤 Guanti
Nitrile standard >0.1 mm EN 374-1 typ C
Protezione standard contro le irritazioni cutanee
👁️ Occhiali / occhiali a maschera
EN 166 D
Protezione contro particelle solide e goccioline; categoria di base
🥼 Camice / tuta
Camice da laboratorio standard in cotone EN 13688
Manica lunga standard abbottonata
💨 Ventilation
4 ACH(air changes/hour) Ventilazione generale di laboratorio
4 ACH minimo per operazioni aperte; cappa aspirante per polveri concentrate di CaCl2
📚 Riferimenti scientifici (Chicago Author-Date)
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. EN 374-1:2016. [link ↗] — Classificazione dei guanti resistenti agli agenti chimici tipo A/B/C; test di permeazione JKLPT
European Committee for Standardization (CEN). 2001. EN 166:2001 — Personal eye-protection — Specifications. CEN, Brussels. EN 166:2001. [link ↗] — Marcature: B = energia d'impatto media, T = temp. estreme, 9 = metalli fusi e corpi solidi
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. EN 14605:2009. [link ↗] — Protezione Type 3 (jet-tight) e Type 4 (spray-tight) contro le sostanze chimiche liquide
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. [link ↗] — Guida pratica alla scelta del CPC per sostanza e scenario di esposizione
Occupational Safety and Health Administration (OSHA). 2011. Personal Protective Equipment — General requirements. U.S. Department of Labor — 29 CFR 1910.132. 29 CFR 1910.132. [link ↗] — Il datore di lavoro deve garantire DPI + formazione + valutazione dei rischi documentata per iscritto
🗄️ Matrice di compatibilità di stoccaggio (6×6)
Mappa visiva di compatibilità delle classi di stoccaggio — verificare prima di collocare i contenitori l'uno accanto all'altro. Passare il cursore su una cella per visualizzare la spiegazione e la regola di origine (NFPA / OSHA / Bretherick / ECHA).
National Fire Protection Association (NFPA). 2024. NFPA 30: Flammable and Combustible Liquids Code. NFPA, Quincy, MA. NFPA 30 (2024 ed.). [link ↗] — §9.4–9.7 — class-based storage segregation rules (the canonical US lab/industrial reference)
Occupational Safety and Health Administration (OSHA). 2023. 29 CFR 1910.106 — Flammable Liquids. U.S. Department of Labor, Federal Register. 29 CFR 1910.106. [link ↗] — (d)(5)(i)–(iv) — flammable storage cabinet, inside-storage room, and segregation requirements
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. CLP Annex VI. [link ↗] — §2.4–2.5 — EU-level classification driving storage compatibility under REACH/CLP
♻️ Smaltimento dei rifiuti chimici (BDO)NON_HAZARDOUS
📋 Codice EWC (Catalogo Europeo dei Rifiuti): nessuno
Codice con asterisco (*) = rifiuto pericoloso che richiede la registrazione BDO + un protocollo di trasporto (Scheda di Trasferimento dei Rifiuti).
🌍Pericolo per l'ambiente:
NO
💧Rischio di contaminazione dell'acqua:
NO
🌱Rischio di contaminazione del suolo:
SÌ
🚫NON scaricare in fognatura:
NO
🚛HAZMAT transport (ADR):
NO
🏭 Aziende autorizzate allo smaltimento (BDO) — 3 di 8 in totale
📋 Elenco BDO completo:bdo.mos.gov.pl ↗
— registro ufficiale del Ministero del Clima e dell'Ambiente. Scheda di Trasferimento dei Rifiuti (KPO):modello BDO
obbligatorio per ogni consegna di rifiuti pericolosi.
📚 Riferimenti scientifici (Chicago Author-Date)
European Commission. 2014. Commission Decision 2014/955/EU on the list of waste pursuant to Directive 2008/98/EC. Official Journal of the European Union. Decyzja 2014/955/UE. [link ↗] — European List of Waste (LoW) — codici EWC a 6 cifre + asterisco per i rifiuti pericolosi
Ministerstwo Klimatu i Środowiska Rzeczypospolitej Polskiej. 2020. Rozporządzenie Ministra Klimatu z dnia 2 stycznia 2020 r. w sprawie katalogu odpadów. Dziennik Ustaw RP 2020 poz. 10. [link ↗] — Catalogo polacco dei rifiuti — attuazione della Decisione 2014/955/UE
Główny Inspektorat Ochrony Środowiska (GIOŚ). 2024. Baza Danych O Odpadach (BDO) — System rejestracji firm utylizacyjnych. Ministerstwo Klimatu i Środowiska. [link ↗] — Registro centrale BDO — elenco completo delle aziende autorizzate alla gestione dei rifiuti
Polska — Sejm RP. 2012. Ustawa z dnia 14 grudnia 2012 r. o odpadach. Dz.U. 2013 poz. 21 (z późn. zm.). [link ↗] — Legge nazionale — definisce gli obblighi del produttore di rifiuti + registrazione BDO
Furr, A. Keith, ed.. 2000. CRC Handbook of Laboratory Safety. CRC Press. — Classificazione dei rifiuti di laboratorio + procedure di segregazione (capitolo Waste Management); norme EN 374:2013 sui guanti per il personale che manipola rifiuti pericolosi.
Pohanish, Richard P.. 2017. Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens. Elsevier. — Classificazione dei rifiuti per CAS + incompatibilità — input per la mappatura EWC.
Lewis, Richard J.. 2012. Sax's Dangerous Properties of Industrial Materials. Wiley. — Reattività + compatibilità di stoccaggio dei rifiuti (ossidanti vs infiammabili — flussi separati).
NIOSH. 2024. Pocket Guide to Chemical Hazards. U.S. Department of Health and Human Services. [link ↗] — PEL/REL/IDLH per CAS — base per i DPI richiesti durante il trasporto dei rifiuti (KPO).
OSHA. 2024. Occupational Chemical Database — Hazardous Waste Operations (HAZWOPER). Occupational Safety and Health Administration. [link ↗] — 29 CFR 1910.120 — formazione + DPI per la gestione dei rifiuti pericolosi.
European Parliament and Council. 2008. Directive 2008/98/EC on waste (Waste Framework Directive). Official Journal of the European Union L 312/3. [link ↗] — Gerarchia della gestione dei rifiuti (prevenzione → recupero → smaltimento); definisce i "rifiuti pericolosi".
European Parliament and Council. 2009. Regulation (EC) No 1272/2008 (CLP) on classification, labelling and packaging of substances and mixtures. Official Journal of the European Union L 353. [link ↗] — Classificazione CLP delle indicazioni di pericolo H → mappatura verso EWC * (asterisco = pericoloso).
United Nations Economic Commission for Europe (UNECE). 2023. European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR 2025). UNECE. [link ↗] — ADR — requisiti per il trasporto di rifiuti pericolosi (KPO + numero UN + classi 1–9).
IPCS INCHEM. 2024. International Programme on Chemical Safety — Waste Management Guidelines. WHO/UNEP/ILO. [link ↗] — Linee guida internazionali di neutralizzazione + smaltimento per CAS.
European Parliament and Council. 2006. Regulation (EC) No 1013/2006 on Shipments of Waste. Official Journal of the European Union L 190: 1–98. [link ↗] — Trasferimento transfrontaliero di rifiuti pericolosi — requisiti di notifica + consenso prima dell'esportazione
📋 Conformità normativa (checklist di conformità)NON_HAZARDOUS6 richiesto12 voci
ℹ️ Lista di controllo degli obblighi normativi per CAS 50-81-7.
Stato basato su: ADR 2023 (Tabella A), REACH Allegato XVII, CLP Allegato VI (classificazione armonizzata), hazard class da m14-spill DB, SVHC, GIS e NDS PL. Principio: assenza di dati = assenza di affermazione (NON dichiariamo 'assenza di restrizioni' senza base).
✅SDS (Scheda di Dati di Sicurezza) disponibilesoddisfatto
Come garantire la conformità: SODDISFATTO — scheda di dati di sicurezza v15 (PL) disponibile per il download in questa pagina.Requisito: SDS aggiornata conforme al Reg. 1907/2006 (REACH) allegato II, formato a 16 sezioni.
Base giuridica: Rozporządzenie (WE) 1907/2006 (REACH) Art. 31 + Aneks II
Come garantire la conformità: L'etichetta deve contenere: pittogrammi GHS, avvertenza (Pericolo/Attenzione), indicazioni di pericolo H e consigli di prudenza P, dati del produttore. Obbligatorio dal 2010 (sostanze) e dal 2015 (miscele).
Base giuridica: Rozporządzenie (WE) 1272/2008 (CLP) Art. 17-33
❌Formazione in materia di sicurezza chimica (substance-specific)richiesto
Come garantire la conformità: Personale di laboratorio: formazione iniziale (istruzione generale + specifica per la mansione) + aggiornamento periodico ogni 5 anni (o ogni 3 per il personale in posizioni tecnico-ingegneristiche). Documentazione conservata nel fascicolo personale.
Base giuridica: Rozp. MGiP Dz.U. 2004 nr 180 poz. 1860 (szkolenia BHP)
⚪Registrazione BDO (banca dati polacca sui rifiuti)non applicabile
Come garantire la conformità: La classificazione GHS verificata non indica classi che comportino rifiuti pericolosi — la registrazione BDO per questa sostanza non è richiesta. Verificare il codice EWC per la specifica forma del rifiuto.
Base giuridica: Ustawa z 14 grudnia 2012 r. o odpadach (Dz.U. 2013 poz. 21)
Come garantire la conformità: Nessun dato ADR nel set di dati MOL-GOD per questo numero CAS. NON presumere l'assenza di restrizioni — prima della spedizione verificare la classificazione ai fini del trasporto nell'ADR 2023 (Tabella A) e nella sezione 14 della scheda di dati di sicurezza (SDS).
Base giuridica: Umowa europejska ADR 2025 + Ustawa z 19 sierpnia 2011 r. o przewozie towarów niebezpiecznych
Come garantire la conformità: Gli importatori/produttori ≥1 tonnellata/anno devono registrare la sostanza presso l'ECHA (dossier tecnico + Chemical Safety Report se ≥10 t). Consultare ECHA Annex VI / registered substances list.
Base giuridica: Rozporządzenie (WE) 1907/2006 (REACH) Art. 5-22
Come garantire la conformità: Nie figuruje na liście kandydackiej SVHC REACH (art. 59) — stan listy ECHA: 2026-05-23. Lista kandydacka to NIE załącznik XIV.
Base giuridica: REACH Art. 7(2) + 33 — SVHC notification + communication
❓REACH Allegato XVII (restrizioni all'uso/commercializzazione)da verificare
Come garantire la conformità: Brak wpisu w zbiorze klasyfikacji zharmonizowanej (CLP Załącznik VI) dla tego numeru CAS — status poz. 28–30 (zakaz CMR) NIEZWERYFIKOWANY; nie zakładać braku ograniczenia. Zbiór ograniczeń Załącznika XVII również niepełny — sprawdź skonsolidowany Załącznik XVII oraz klasyfikację zharmonizowaną CMR na stronach ECHA.
Base giuridica: Rozporządzenie (WE) 1907/2006 (REACH) Załącznik XVII — ograniczenia produkcji/obrotu/stosowania
❓NDS — Concentrazione Massima Ammissibile nell'ambiente di lavoroda verificare
Come garantire la conformità: Dati NDS non presenti nell'insieme MOL-GOD (insieme incompleto — circa 41 su ~600 sostanze dell'elenco). L'assenza NON significa assenza di NDS — verifica l'elenco completo G.U. 2024 pos. 1017 (Reg. MRiPS del 4 settembre 2024), e in caso di assenza applica OEL dalle direttive UE o raccomandati da NIOSH/ACGIH.
Base giuridica: Rozp. MRiPS z 4 września 2024 r. (Dz.U. 2024 poz. 1017) — NDS i NDSCh
Come garantire la conformità: Non presente nell'insieme di lavoro disponibile dei precursori (elenco incompleto). L'assenza NON è conferma — verifica rispetto all'all. I Reg. (CE) 273/2004 e all'elenco GIS prima della commercializzazione.
Base giuridica: Rozp. (WE) 273/2004 + Ustawa o przeciwdziałaniu narkomanii (Dz.U. 2005 nr 179 poz. 1485)
✅Scheda di dati di sicurezza in lingua polaccasoddisfatto
Come garantire la conformità: SODDISFATTO — scheda in lingua polacca (v15) disponibile in questa pagina.Requisito: SDS in lingua polacca per la commercializzazione in PL (Art. 31 REACH + Legge sulle sostanze chimiche Art. 17).
Base giuridica: Ustawa z 25 lutego 2011 r. o substancjach chemicznych i ich mieszaninach (Dz.U. 2011 nr 63 poz. 322)
European Parliament and Council. 2008. Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP). Official Journal of the European Union L 353/1. CLP Regulation 1272/2008. [link ↗] — Classificazione, etichettatura e imballaggio delle sostanze + miscele (implementazione GHS nell'UE)
European Parliament and Council. 2006. Regulation (EC) No 1907/2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). Official Journal of the European Union L 396/1. REACH Regulation 1907/2006. [link ↗] — REACH — registrazione, valutazione e autorizzazione delle sostanze chimiche; SVHC; SDS Allegato II
Ministerstwo Rodziny i Polityki Społecznej Rzeczypospolitej Polskiej. 2024. Rozporządzenie Ministra Rodziny i Polityki Społecznej z dnia 4 września 2024 r. w sprawie najwyższych dopuszczalnych stężeń i natężeń czynników szkodliwych dla zdrowia w środowisku pracy. Dziennik Ustaw RP 2024 poz. 1017. [link ↗] — NDS e NDSCh per circa 600 sostanze chimiche — limiti polacchi attuali di esposizione professionale
United Nations Economic Commission for Europe (UNECE). 2023. European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR), 2025 Edition. United Nations, Geneva. ADR 2025. [link ↗] — Accordo internazionale sul trasporto su strada di merci pericolose — numeri UN, classi, imballaggi
📚 Riferimenti scientifici consolidati — Chicago Author-Date 10 sources
Riferimenti raccolti da tutte le schede del Safety Hub. CAS: 50-81-7 ·
PubChem ↗
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, Normative
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
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
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
European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms." CEN, Brussels. [↗]
PPE
UNECE. 2023. "European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR 2025)." United Nations, Geneva. [↗]
Utylizacja, Regulacje
National Fire Protection Association (NFPA). 2022. "NFPA 400 — Hazardous Materials Code." NFPA, Quincy, MA. [↗]
Magazynowanie
Urben, P.G. (ed.). 2017. "Bretherick's Handbook of Reactive Chemical Hazards, 8th ed.." Butterworth-Heinemann / Elsevier, Oxford. [↗]
Magazynowanie
Ministerstwo Klimatu i Środowiska RP. 2023. "Baza danych o produktach i opakowaniach oraz o gospodarce odpadami (BDO)." Ministerstwo Klimatu i Środowiska, Warszawa. [↗]
Utylizacja
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
Le schede con riferimenti propri (Emergency, PPE, Storage, Waste) contengono ulteriori voci bibliografiche all'interno delle rispettive sezioni.
Incolla una serie di misure replicate (CSV oppure un numero per riga). Il calcolatore calcolerà la media, la deviazione standard e il 95% CI, e rileverà gli outlier (Grubbs + Dixon Q).
Separatore: virgola, spazio, tab, nuova riga. Min 3 misurazioni.
📐 Formule statistiche
x̄ = Σxᵢ / n — media aritmetica
s² = Σ(xᵢ - x̄)² / (n-1) — varianza campionaria
s = √s² — deviazione standard
RSD% = (s / x̄) × 100% — deviazione standard relativa
ℹ️ Single-CAS Integrity: I seguenti solventi sono strumenti analitici (fase mobile HPLC) — NON sono la sostanza analizzata. I valori mostrati negli altri accordion (MW, GHS, tossicologia) si riferiscono alla molecola corrente, non a questi solventi. Eccezione: Single-CAS Integrity (categoria "solventi/tamponi/metodi analitici").
Phase
Solvente / CAS
Stato
Azione
A
Woda + 10mM bufor wodorowęglanu amonu CAS 7732-18-5
Ponto T, Latter G, Luna G, Leite-Silva V, Wright A, Benson H. Novel Self-Nano-Emulsifying Drug Delivery Systems Containing Astaxanthin for Topical Skin Delivery. Pharmaceutics. 2021;13:649. doi:10.3390/pharmaceutics13050649
Astaxanthin (ASX) is a potent lipophilic antioxidant derived from the natural pigment that gives marine animals their distinctive red-orange colour and confers protection from ultraviolet radiation. Self nano-emulsifying drug delivery systems (SNEDDS) have been successfully developed and evaluated to increase the skin penetration of ASX and target its antioxidant and anti-inflammatory potential to the epidermis and dermis. SNEDDS were prepared using a low-temperature spontaneous emulsification method, and their physical characteristics, stability, antioxidant activity, and skin penetration were characterized. Terpenes (D-limonene, geraniol, and farnesol) were included in the SNEDDS formulations to evaluate their potential skin penetration enhancement. An HPLC assay was developed that allowed ASX recovery from skin tissues and quantification. All SNEDDS formulations had droplets in the 20 nm range, with low polydispersity. ASX stability over 28 days storage in light and dark conditions was improved and antioxidant activity was high. SNEDDS-L1 (no terpene) gave significantly increased ASX penetration to the stratum corneum (SC) and the epidermis-dermis-follicle region (E + D + F) compared to an ASX in oil solution and a commercial ASX facial serum product. The SNEDDS-containing D-limonene gave the highest ASX permeation enhancement, with 3.34- and 3.79-fold the amount in the SC and E + D + F, respectively, compared to a similar applied dose of ASX in oil. We concluded that SNEDDS provide an effective formulation strategy for enhanced skin penetration of a highly lipophilic molecule, and when applied to ASX, have the potential to provide topical formulations for UV protection, anti-aging, and inflammatory conditions of the skin.
Exploring the In Vitro Photoprotective Effect of a Combination of Aspalathus linearis Natural Extracts: First Steps in Developing New Technologies for Photoprotection Strategies
HPLCInternational Journal of Molecular Sciences202593% ✓CC-BYResearch method (specificity, robustness)
Colonna: C18, 100 x 4.6 mm, 0.45 μm
Fase: mobile phase consisted of a gradient elution using the proportions of solvent…
Rivelazione: UV 540 nm
Flusso: 1.00 mL/min
Temp.: 37.0 °C
Inj.: 200 μL
Gradient: elution using the proportions of solvent A (2% v/v acetic…
Cáceres Estévez I, Haya Rodriguez L, Haro Perdiguero E, Moreno Tovar F, Montalvo Lobo D, Botella L, et al. Exploring the In Vitro Photoprotective Effect of a Combination of Aspalathus linearis Natural Extracts: First Steps in Developing New Technologies for Photoprotection Strategies. International Journal of Molecular Sciences. 2025;26:2330. doi:10.3390/ijms26052330
There is a need for new technologies in photoprotection. The negative effects of solar exposure on the skin have been amply demonstrated and there is an urgency for the development of alternative photoprotective approaches. In this respect, natural extracts represent the most interesting and promising source. Among them, Aspalathus linearis extracts appear to be an excellent candidate due to supporting evidence, their multiple beneficial biological effects, and their robust toxicological profile. Here, we first explored the photoprotective properties of two different Aspalathus linearis extracts (fermented and unfermented) individually, and then in combination, in a simplified model assessing Normal Human Dermal Fibroblast survival after UVB radiation. Surprisingly, we found the fermented extract to be more photoprotective than the unfermented one. In addition, a specific combination of the two extracts showed a synergistic effect. By HPLC and FRAP analyses, we observed that the photoprotective effect did not correlate with the amount of Aspalathus linearis main characteristic metabolites nor with the antioxidant capacity of the ingredients. Finally, an additional photoprotective effect was observed when Aspalathus linearis extracts were combined with a Polypodium leucotomos extract (Fernblock®), a well-known botanical ingredient with demonstrated photoprotection activities. Thus, this work provides a solid scientific basis for the inclusion of this technology in future topical and systemic photoprotective strategies.
Ostera J, Olmos V, Puntarulo S, Bonetto J, Malanga G. High-Performance Liquid Chromatography Quantification of Glyphosate, Aminomethylphosphonic Acid, and Ascorbate in Culture Medium and Microalgal Cells. Bio-protocol. 2025;15:125955-125955. doi:10.21769/BioProtoc.5263
Glyphosate (GLY) is a widely used herbicide that can induce oxidative stress in microalgae and other non-target organisms. The quantification of GLY in surface water is a difficult task, especially in trace-level concentrations, due to its high polarity and susceptibility to biotic and abiotic degradation. Several analytical methods have been developed for GLY quantification. Most of them use high-performance liquid chromatography (HPLC) coupled with detection by mass spectrometry (MS) and include a derivatization step to decrease the polarity of the herbicide to improve detection. This protocol describes an adaptation of an existing protocol for the quantification of GLY and its metabolite aminomethylphosphonic acid (AMPA) in a water-based microalgae culture medium using ultra-high-pressure liquid chromatography (UHPLC) coupled with fluorescence detection (FLR). The principal advantage of this protocol compared with other analytical methods that employ HPLC–MS is its low cost and accessibility since it does not require an MS detector nor radioactively labeled analytical standards. Ascorbic acid (AH-) is one of the most important hydrosoluble non-enzymatic antioxidants in eukaryotic cells and plays a key role in many metabolic pathways of critical importance in plants and algae. In this protocol, we also describe an adaptation of a previously published protocol to quantify AH- in blood samples to be used in microalgal cells exposed to GLY and GLY-based herbicides. The sample preparation procedure for this last protocol is fast, easy, and does not require expensive equipment. It uses an HPLC system coupled with an electrochemical detector (EC) for AH- quantification but may be adapted to be used with a UV-Vis detector.
Key features
• These protocols employ HPLC or UHPLC. The end user should be proficient with this technique and be able to optimize chromatographic parameters as necessary.• The GLY and AMPA quantification protocol, designed upon the method developed by...
Nessuna interferenza — picco dell'analita completamente risolto (Rs ≥ 2.0)
—
Robustezza (robustness)
nessun dato
RSD < 2% con variazione del ±5%
RSD < 2% con piccole variazioni dei parametri
—
Legend:✓ PASS⚠ CAUTION✗ FAIL— NO_DATA
📚 Riferimenti scientifici (Chicago Author-Date) — fare clic per espandere
Standard di convalida dei metodi analitici — 4 fonti indipendenti (ICH + USP + AOAC + Snyder).
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
United States Pharmacopeia (USP) Convention. 2024. USP General Chapter <621> Chromatography. USP-NF 2024 ed. USP. [link ↗]
AOAC International. 2016. Appendix F: Guidelines for Standard Method Performance Requirements. AOAC INTERNATIONAL. [link ↗] — AOAC SMPR — alternative to ICH Q2 for food/dietary supplements
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
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).
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.
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.
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.
Meyer, Veronika R.. 2010. Practical High-Performance Liquid Chromatography. 5th ed. Wiley. ISBN 978-0-470-68218-0. — European pharmacopeial perspective — complements USP/AOAC.
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).
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.
🔧 Risoluzione dei problemi HPLC — albero decisionale6 problemi comuni
Diagnostica dei 12 problemi HPLC più comuni con albero decisionale (5 passaggi per problema). Fonte: Snyder/Kirkland/Dolan 3rd ed. Chapter 17 + LCGC LC Troubleshooting columns 1989-2024.
Picchi allargati (broad peaks) medium
Sintomo: Tutti i picchi nel cromatogramma sono più larghi del previsto (FWHM > 2× della norma)
🔍 Albero diagnostico:
1. Verifica se tutti i picchi sono allargati o solo alcuni → SÌ: Tutti → problema strumentale (colonna o sistema) → NO: Solo alcuni → problema chimico (interazione con la colonna per analiti specifici)
2. Sostituisci con una colonna di prova — il problema scompare? → SÌ: COLONNA usurata — packing danneggiato, void nei primi mm. Sostituiscila. → NO: Problema nel sistema LC
3. Controllare il volume morto (dead volume) — loop di iniezione, connessioni, rivelatore → SÌ: Loop > 100 µL per una colonna da 4.6 mm o connessioni allentate → sostituire le ferrule, accorciare i tubi → NO: Continua diagnostica
4. Test di temperatura: aumentare la colonna da 25°C a 40°C → SÌ: Picchi più stretti → cinetica di trasferimento di massa troppo lenta (aumentare T) → NO: Continue
5. Controllare il flow rate rispetto al valore ottimale di van Deemter per questa colonna → SÌ: Ottimale per 4.6mm/5µm = 1.0 mL/min, per 2.1mm/3µm = 0.4 mL/min → NO: Continue
⚠️ Cause comuni:
Colonna usurata (>2000 iniezioni senza guard)
Volume morto del sistema > 100 µL (loop errato, tubi lunghi, ferrule allentate)
Temperatura troppo bassa (cinetica di trasferimento di massa)
Flow rate al di fuori dell'ottimale di van Deemter
Solvente del campione più forte della fase A
✓ Soluzioni:
✓ Sostituire la colonna (quando >2000 iniezioni)
✓ Controllare tutte le connessioni — tubi il più corti possibile
✓ Aumentare la T della colonna a 40°C (se la sostanza è stabile)
✓ Ridurre il flow all'ottimale di van Deemter
✓ Sciogliere il campione nella fase A (non in organico puro)
Coda dei picchi (tailing, T > 1.5) high
Sintomo: I picchi presentano una "coda" prolungata sul lato di eluizione tardiva (asimmetria T = b/a > 1.5 secondo USP)
🔍 Albero diagnostico:
1. La sostanza contiene gruppi basici (ammino, piridina)? → SÌ: Sì → interazioni silanoliche! Aggiungere 0.1% TFA o 5-10 mM TEA alla fase A. → NO: Continue
2. Controllare il pH della fase mobile rispetto al pKa della sostanza → SÌ: pH = pKa ± 1 → ionizzazione parziale, peak split. Portare il pH a ≥ 2 unità di distanza dal pKa. → NO: Continue
3. Controllare l'età della colonna (>1500 iniezioni?) → SÌ: Sì → silanoli esposti (column bleed). Sostituire con una colonna con endcapping più elevato (XTerra, Symmetry). → NO: Continue
4. Il campione contiene metalli (Fe, Cu dalle fiale di vetro)? → SÌ: Sì → utilizzare fiale incolori di tipo II o PFA. EDTA 0.1mM nel campione. → NO: Continue
⚠️ Cause comuni:
Interazioni silanoliche (analita basico + silanoli liberi del gel di silice)
pH al limite del pKa dell'analita (peak split)
Colonna vecchia (column bleed, elevata attività silanolica)
Metalli nel campione (chelazione → tailing)
Sovraccarico della colonna (>50 µg su una colonna da 4.6mm)
✓ Soluzioni:
✓ Aggiungere 0.1% TFA (UV) o 0.1% acido formico (LC-MS) alla fase A
✓ Scegliere una colonna con endcapping ad alta purezza: Waters XBridge BEH, Phenomenex Kinetex
✓ Lavorare a pH ≥ 2 unità di distanza dal pKa
✓ EDTA 0.1mM nel campione (chelazione Fe/Cu)
✓ Ridurre il volume di iniezione a ≤ 20 µL per una colonna da 4.6mm
Deriva della linea di base (baseline drift) medium
Sintomo: La linea di base aumenta o diminuisce sistematicamente per >5 minuti
🔍 Albero diagnostico:
1. Si sta utilizzando un gradiente (B% in aumento)? → SÌ: Sì → assorbimento diverso delle fasi A e B a dλ. Cambio di solvente nell'UV-cutoff. Controllare l'assorbanza UV del % di organico. → NO: Continua (isocratico)
2. Controllare la temperatura della colonna — è stabile a ±0.5°C? → SÌ: Sì (stabile) → continua → NO: Instabile → attivare il termostato della colonna (>25°C controllato)
3. Test: spegnere l'autosampler, far funzionare solo pompa+colonna+rivelatore → SÌ: La deriva scompare → contaminazione dell'autosampler (pulire l'ago, il septum) → NO: Continue
4. Controllare l'età della lampada (D2 per UV) → SÌ: Sì (>1500 ore) → sostituire la lampada → NO: Continue
⚠️ Cause comuni:
Eluizione a gradiente con UV-cutoff diverso delle fasi
T della colonna instabile
Contaminazione dell'ago/septum dell'autosampler
Lampada UV vecchia (>1500h)
Cella di flusso del rivelatore sporca
Colonna non equilibrata (<10 volumi di colonna)
✓ Soluzioni:
✓ Pre-equilibrare la colonna per 10-15 volumi di colonna al 100% A
✓ Termostato colonna attivo, T 30-40°C stabile
✓ Pulire la flow cell del rivelatore con soluzione ACN:H2O 50:50
✓ Sostituire la lampada D2 se >1500h
✓ Usare la baseline subtraction (funzione nativa Chromeleon, Empower)
Nessun picco / picco perso (no peak) critical
Sintomo: Il picco atteso dell'analita non compare nel cromatogramma
🔍 Albero diagnostico:
1. L'iniezione è stata effettivamente eseguita? → SÌ: Controllare il log dell'autocampionatore, la pressione della pompa (dovrebbe calare durante l'iniezione) → NO: Problema dell'autocampionatore → controllare il loop, l'ago, il campione nella fiala
2. Il campione è nella fiala (volume corretto, non evaporato)? → SÌ: Continue → NO: Nessun campione — ri-pipettare
3. Stabilità del campione — preparato >24h fa? → SÌ: Sì → degradazione. Ri-preparare un campione fresco. → NO: Continue
4. Controllare la lunghezza d'onda di rilevazione rispetto al λmax della sostanza → SÌ: Rilevazione a λ NON corrisponde al λmax → nessun segnale. Scansione DAD 200-400nm. → NO: Continue
5. Test: iniettare uno standard puro (di concentrazione nota, fresco) → SÌ: Lo standard dà un picco → problema con il campione (matrice, derivatizzazione) → NO: Nessun picco anche con lo standard → problema di sistema (colonna, fase, gradiente)
⚠️ Cause comuni:
Campione non prelevato dalla fiala (bug dell'autocampionatore)
Campione degradato (>24h pH/temp/luce)
Rilevazione alla lunghezza d'onda errata
Fase mobile errata (es. TFA dimenticato)
Colonna invertita / fase stazionaria errata
La sostanza eluisce sul fronte (V0) → non trattenuta, non visibile
✓ Soluzioni:
✓ Ri-preparare un campione fresco secondo il protocollo esatto
✓ Scansione UV-Vis DAD 200-400nm + ricerca del λmax
✓ Controllare la composizione della fase mobile — TFA aggiunto?
✓ Testare la direzione inversa della colonna (con cautela!)
✓ Per ritenzione <1 min — abbassare il % B, MeOH al posto di ACN
✓ Controllare la tabella "expected_rt" in wp_molgod_hplc_methods
Pressione troppo alta (pressure too high) critical
Sintomo: Pressione della pompa > 80% del massimo della colonna o shutdown del sistema con errore high-pressure
🔍 Albero diagnostico:
1. Controllare che la colonna sia collegata correttamente (direzione della freccia) → SÌ: OK → NO: Colonna invertita → invertirla (non lavorare mai "al contrario")
2. Test: rimuovere la colonna dal sistema, far girare pompa+rivelatore da soli → SÌ: La pressione scende a <50 bar → problema nella colonna (intasata) → NO: La pressione rimane alta → filtro in-line intasato, frit sporco
3. Controllare il filtro pre-colonna (frit in-line) → SÌ: Sporco e brunastro → sostituire → NO: Continue
4. Retro-lavare la colonna con ACN:H2O 50:50 senza la colonna — scompare? → SÌ: Particelle bloccate nel primo mm — un flush di 30 min può recuperarla → NO: Sostituire la colonna
⚠️ Cause comuni:
Filtro in-line (frit) intasato da particelle
Salting-out del buffer (precipitazione ad alto %B)
Il campione contiene materiale in sospensione (filtrare a 0.22 µm prima dell'iniezione)
Colonna intasata (compattazione del letto della colonna)
Gradiente con fase buffer + molto organico → precipitazione del sale
✓ Soluzioni:
✓ Filtrare SEMPRE il campione con PVDF 0.22 µm prima dell'iniezione
✓ Sostituire il filtro in-line ogni 100 iniezioni (o quando la pressione aumenta >20%)
✓ NON usare buffer fosfato >20mM + >70% ACN (il sale precipita)
✓ Lavare la colonna per 30 min con ACN:H2O 50:50 in direzione inversa (quando il produttore lo consente)
✓ Pre-colonna 4×3mm per proteggere la colonna principale
Picchi fantasma (ghost peaks) high
Sintomo: Picchi inspiegabili sul cromatogramma assenti nella calibrazione
🔍 Albero diagnostico:
1. Test: iniezione in bianco (solvente puro del campione) → SÌ: Compare un ghost → contaminazione del sistema o degli eluenti → NO: Compare solo con il campione → matrice
2. Il ghost cresce con il gradiente (eluisce ad alta %B)? → SÌ: Sì → colonna sovraccarica o composti fortemente trattenuti dalla corsa precedente → NO: Indipendente dal gradiente → carryover dell'autocampionatore
3. Increase carryover wash (between injections) → SÌ: Aiuta → il carryover era la causa. Protocollo di lavaggio più forte. → NO: Continue
4. Iniezione di acqua pura — c'è un picco? → SÌ: Sì → contaminazione della fonte d'acqua (sostanze organiche dal sistema DI) → NO: Continue
⚠️ Cause comuni:
Carryover nell'ago/loop dell'autocampionatore
Contaminazione dell'eluente (anche di grado HPLC)
Componenti fortemente trattenuti da corse precedenti
Plastica nelle fiale (ftalati, PEG dai tappi)
Acqua DI insufficientemente purificata
✓ Soluzioni:
✓ Rafforzare il protocollo di lavaggio: 100% B → 100% A → 50:50 (3 cicli)
✓ Lavaggio forte: DMSO 100% o MeOH 100% prima della calibrazione
✓ Filtrare gli eluenti con PTFE 0.22 µm in caso di dubbio
✓ Usare vetro ambrato + tappi con rivestimento in Teflon per i campioni
✓ Rampa di gradiente periodica fino a 100% B per 10 min (clean-out)
📚 Riferimenti scientifici (Chicago Author-Date) — fare clic per espandere
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 ↗]
Dolan, John W.. 2014. LC Troubleshooting (monthly column 1989-2024). LCGC North America. [link ↗] — John Dolan 35-letnia seria miesięcznych artykułów problemowych
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
Dolan, John W.. 2013. When to Modify Method Conditions. 192-199. [link ↗] — Decision flow for changing flow rate / temperature / %B vs swapping columns.
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).
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.
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).
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).
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).
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 ↗]
Carr, Peter W.. 2009. The new physical chemistry of HPLC. 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094 [link ↗]
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 ↗]
Engelhardt, Heinz. 2014. 100 Years of Chromatography. 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. Probabilistic approach to peak deconvolution in chromatography. 8525-8531. https://doi.org/10.1021/ac101742z [link ↗]
🧪 Solubilità e compatibilità con i solventi MolGod_SOLUB_1
Molecola
L-Ascorbic Acid
Formula
C6H8O6
logP
-1.60
Massa (g/mol)
176.12
Polarità
Idrofila (polare)
⚠️ Stima HSP (letteratura / group contribution). Dati indicativi — non sostituiscono le prove sperimentali.
Teoria della solubilità (applicata nella previsione della compatibilità):
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).
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. CRC Press. https://doi.org/10.1201/9781420006834 — Tripletta HSP (dD, dP, dH) + formula Ra.
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
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.
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.
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.
Marcus, Yizhak. 1998. The Properties of Solvents. Wiley Series in Solution Chemistry, Vol. 4. ISBN 9780471983699 — Set tabulare completo di 250+ solventi (ε, μ, donicità, numeri di accettore).
PubChem Compound Database — CAS 50-81-7 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.
Bibliografia completa nell'accordion RIFERIMENTI (in fondo alla pagina) — Chicago Manual of Style 17th ed., Author-Date.
🧮 Calcolatore di solubilità
Solubilità:—
logS:—
Metodo:—
⚠️ —
Solubilità vs Temperatura
🌐 Hansen Solubility Sphere (3D)
Quanto più vicino alla molecola (sfera rossa), tanto migliore è il solvente. · Avanzato: etichette + griglia + assi + pulsazione.
La tua molecola
Buono (Ra < 5)
Medio (Ra 5-10)
Scarso (Ra > 10)
📚 Fonti dei dati HSP + Ra
Ke Z; Zhang Y; Jiang X; Luo J; Chen H; Ma Y. 2026. "Ascorbic acid enhances antidepressant-like efficacy of esketamine: Hippocampal TARP-γ8-containing AMPA receptors mediate synaptic modulation." Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics. https://doi.org/10.1016/j.neurot.2025.e00786. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI ↗]
Zou Y; Zhang M; Zhou D; Chi C; Wu F; Ding CF. 2025. "Identification and characterization of chiral vitamin C using ion mobility and theoretical calculation." Analytical and bioanalytical chemistry. https://doi.org/10.1007/s00216-025-05855-7. [DOI ↗]
Tarhouchi S; Hlaibi M. 2024. "Kinetic control aspects and mechanisms in oriented membrane processes for extraction and recovery of ascorbic acid compound." Environmental science and pollution research international. https://doi.org/10.1007/s11356-024-35453-6. [DOI ↗]
Begimbetova D; Burska AN; Baltabekova A; Kussainova A; Kukanova A; Fazyl F. 2024. "The Vitamin C Enantiomers Possess a Comparable Potency in the Induction of Oxidative Stress in Cancer Cells but Differ in Their Toxicity." International journal of molecular sciences. https://doi.org/10.3390/ijms25052531. [DOI ↗]
Li J; Du N; Guan R; Zhao S. 2023. "Construction of a Chiral Fluorescent Probe for Tryptophan Enantiomers/Ascorbic Acid Identification." ACS applied materials & interfaces. https://doi.org/10.1021/acsami.3c02423. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI ↗]
Maneffa AJ, Harrison AB, Radford SJ, Whitehouse AS, Clark JH, Matharu AS.. 2020. "Deep Eutectic Solvents Based on Natural Ascorbic Acid Analogues and Choline Chloride." . https://doi.org/10.1002/open.202000020. [DOI ↗]
el-Hady DA; Gotti R; el-Maali NA. 2008. "Selective determination of catechin, epicatechin and ascorbic acid in human urine using chiral capillary electrophoresis." Journal of separation science. https://doi.org/10.1002/jssc.200700638. [DOI ↗]
Grisar JM; Marciniak G; Bolkenius FN; Verne-Mismer J; Wagner ER. 1995. "Cardioselective ammonium, phosphonium, and sulfonium analogues of alpha-tocopherol and ascorbic acid that inhibit in vitro and ex vivo lipid peroxidation and scavenge superoxide radicals." Journal of medicinal chemistry. https://doi.org/10.1021/jm00015a010. [DOI ↗]
Metodo: Group Contribution (GC) — stima rapida di δD/δP/δH da logP in assenza di dati sperimentali. Accuratezza ±2 MPa^½. Per maggiore precisione → software HSPiP.
❓ Jak przygotować roztwór standardowy kwasu L-askorbinowego o stężeniu 0,1 mol/L?
Aby przygotować roztwór standardowy kwasu L-askorbinowego (C6H8O6) o stężeniu 0,1 mol/L: 1. Oblicz masę substancji: n = 0,1 mol/L * 1 L = 0,1 mola; m = n * MM = 0,1 mol * 176,12 g/mol = 17,612 g. 2. Odmierz 17,612 g kwasu L-askorbinowego i rozpuść w około 900 mL wody dejonizowanej. 3. Uzupełnij do objętości 1 L wodą dejonizowaną.
Utile?
❓ Jak przechowywać kwas L-askorbinowy, aby zachować jego stabilność?
Kwas L-askorbinowy należy przechowywać: 1. W temperaturze pokojowej (15-25°C). 2. W ciemnym miejscu, chroniąc przed bezpośrednim światłem słonecznym. 3. W szczelnie zamkniętym pojemniku, aby ograniczyć kontakt z wilgocią i tlenem.
Utile?
❓ Jaka jest odpowiednia metoda analityczna do oznaczania czystości kwasu L-askorbinowego?
Dla kwasu L-askorbinowego (MW 176,12 g/mol) zalecana jest metoda HPLC (high-performance liquid chromatography), która pozwala na precyzyjne oznaczenie czystości i identyfikację ewentualnych zanieczyszczeń. Alternatywnie, można użyć spektroskopii UV-Vis przy λ=240 nm.
Utile?
❓ Jakie są potencjalne niezgodności chemiczne kwasu L-askorbinowego w roztworach wodnych?
Kwas L-askorbinowy może reagować z: 1. Silnymi utleniaczami (np. nadtlenkiem wodoru), tworząc produkty uboczne. 2. Zasadami (pH > 4,5), ulegając deprotonacji i zmieniając właściwości analityczne. 3. Jony metali ciężkich (np. Fe³⁺), tworząc kompleksy.
Utile?
❓ W jakim celu stosuje się kwas L-askorbinowy w laboratoriach chemicznych?
Kwas L-askorbinowy jest używany jako: 1. Standard w titracjach redoks. 2. Środek przeciwutleniający w syntezach organicznych. 3. Wzorzec wewnętrzny w analizie HPLC.
📊 Argomenti estratti automaticamente dagli abstract di 5 pubblicazioni per CAS 50-81-7.
Algoritmo: TF-IDF (Salton & Buckley 1988) — frequenza del termine × frequenza inversa del documento.
vitamin 4
🔍 Dettagli del ranking (TF-IDF)
Tag
TF
DF
IDF
Score
vitamin
4
4
1.182
4.729
🔗 Rete di citazioni (citation network)5 seed papers
📊 Grafo delle citazioni per CAS 50-81-7.
Ogni nodo = un articolo scientifico, un arco A→B = l'articolo A cita B. Dati da OpenAlex (Priem 2022).
Inne nazwy: kwas L-askorbinowy, witamina C, L-askorbinian
Zastosowania
Używany jako przeciwutleniacz w przemyśle spożywczym – zapobiega utlenianiu produktów.
Stosowany w laboratoriach jako reduktor w analizie chemicznej – działa w reakcjach redoks.
Wykorzystywany do przygotowania roztworów buforowych – pomaga kontrolować pH.
Może służyć do czyszczenia metali – rozpuszcza osady żelaza i miedzi.
Stosowany w doświadczeniach edukacyjnych – pokazuje działanie przeciwutleniaczy.
Specyfikacja
Opakowanie: 1000 g (1 kg). Przechowywać w suchym miejscu, w szczelnym pojemniku, w temperaturze pokojowej. Unikać światła słonecznego. Produkt nie nadaje się do spożycia.
Najczęściej zadawane pytania
Czy kwas L-askorbinowy można używać do oczyszczania powierzchni metalowych?
Tak. Kwas L-askorbinowy działa jako łagodny reduktor. Pomaga usuwać rdzę z drobnych elementów metalowych. Nie koroduje powierzchni tak silnie jak mocne kwasy. Czy wiesz, że jest często używany do czyszczenia antyków bez uszkadzania detali?
Czy kwas L-askorbinowy dobrze rozpuszcza się w wodzie?
Tak. Łatwo rozpuszcza się w wodzie – daje klarowny roztwór. Rozpuszczalność wynosi około 330 g/L w 20°C. Nie rozpuszcza się w tłuszczach. Czy wiesz, że jego rozpuszczalność maleje w zimnej wodzie – dlatego lepiej mieszać go w letniej wodzie?
Czym różni się ten kwas od kwasu cytrynowego przy użyciu w doświadczeniach chemicznych?
Kwas L-askorbinowy to silniejszy przeciwutleniacz niż kwas cytrynowy. Nie działa jako kwas tak mocno, ale lepiej chroni przed utlenianiem. Kwas cytrynowy lepiej chelatuje metale. Oba są bezpieczne w użyciu laboratoryjnym przy ostrożności.
Źródła i literatura
PubChem — National Library of Medicine: Kompletna baza właściwości fizykochemicznych tej substancji (CID 54670067). Zawiera dane spektroskopowe, toksykologiczne i informacje o interakcjach. pubchem.ncbi.nlm.nih.gov
Wikipedia PL: Przegląd zastosowań, metod produkcji i właściwości kwasu L-askorbinowego. pl.wikipedia.org
Karta charakterystyki (SDS): Według rozporządzenia REACH (WE) 1907/2006 — informacje o bezpieczeństwie, klasyfikacji GHS i oznaczeniu substancji.
Rozporządzenie CLP (WE) 1272/2008: Klasyfikacja, oznaczenie i pakowanie substancji chemicznych. H315 (powoduje podrażnienie skóry), H319 (powoduje poważne podrażnienie oczu), P280 (używać rękawic ochronnych).
⚠ UWAGA — ODCZYNNIK CHEMICZNY
Kwas L askorbinowy chemiczny do zastosowań technicznych (C6H8O6) powszechnie znana jako witamina C, kwas askorbinowy to odczynnik chemiczny przeznaczony wyłącznie do zastosowań laboratoryjnych, badawczych i profesjonalnych. Numer CAS: 50-81-7 Numer WE (EC): 200-066-2 Nazwa IUPAC:kwas (5R)-[(1S)-1,2-dihydroksyetylo]-3,4-dihydroksyfuran-2(5H)-on Nazwa łacińska (Farmakopea):Acidum ascorbicum
NIE NADAJE SIĘ DO SPOŻYCIA przez ludzi ani zwierzęta. Produkt nie jest lekiem, suplementem diety, kosmetykiem ani środkiem spożywczym. Jakiekolwiek inne zastosowanie niż laboratoryjne lub przemysłowe jest niezgodne z przeznaczeniem produktu.
Wymagane środki ochrony osobistej: rękawice ochronne, okulary lub gogle, fartuch laboratoryjny, praca w dobrze wentylowanym pomieszczeniu lub pod wyciągiem chemicznym.
Przed użyciem zapoznaj się z kartą charakterystyki substancji (SDS/MSDS) zgodnie z rozporządzeniem REACH (WE) 1907/2006 oraz CLP (WE) 1272/2008. Sprzedaż wyłącznie do celów technicznych.
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Gradiente basato su PubChem XLogP3 + LSS (Snyder et al. 2010, cap. 9).
Colonna: C18
Tampone: phosphate
Flusso: 1 mL/min
logP:
-1.6(PubChem XLogP3)
Ramp: 5% → 95% B, 10 min
Tempo totale di analisi: 23 min
t (min)
%A
%B
flow (mL/min)
Commento
0
95
5
1
avvio (equilibrio)
2
95
5
1
fine mantenimento iniziale
12
5
95
1
fine rampa LSS
17
5
95
1
lavaggio della colonna
18
95
5
1
ritorno a init
23
95
5
1
riequilibrazione
📚 Riferimenti scientifici (Chicago Author-Date)
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).
Schoenmakers, Peter J. 1986. Optimization of Chromatographic Selectivity: A Guide to Method Development. Elsevier. — Numerical optimization of gradient programs.
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.
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.
Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. [DOI ↗]
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.
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 ↗]
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).
Dolan, John W.. 2013. "When to Modify Method Conditions." LCGC North America 31: 192-199.
Meyer, Veronika R. 2010. Practical High-Performance Liquid Chromatography. Wiley. — Chapter 7 — practical gradient design with isokratyczny scouting.
Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531. [DOI ↗]
Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. [DOI ↗]
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 ↗]
Engelhardt, Heinz. 2014. 100 Years of Chromatography. Wiley-VCH.
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531. [DOI ↗]
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.
Perkampus, Heinz-Helmut. 1992. "UV-VIS Spectroscopy and Its Applications." Springer. ISBN 978-3-642-77479-9. →
Sadek, Paul C.. 2002. "The HPLC Solvent Guide." 2nd ed. Wiley-Interscience. ISBN 978-0-471-41138-4.
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. →
Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." 2nd ed. Wiley. ISBN 978-1-119-31378-3. →
Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 →
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 →
Kazakevich, Yuri V., and Rosario LoBrutto, eds.. 2007. "HPLC for Pharmaceutical Scientists." Wiley-Interscience. ISBN 978-0-471-68162-4. →
Kim, Sunghwan, et al.. 2023. "PubChem 2023 update." Nucleic Acids Research 51: D1373-D1380 →
Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531 →
Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772 →
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 →
Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." Analytical Chemistry 82: 8525-8531 →
REST: /wp-json/molgod/v1/hplc/detector/50-81-7
📐 Calcolatore della simmetria del picco HPLC (USP Tf / As)
Calcola il fattore di tailing USP (T) e l'asimmetria (As) dalle semilarghezze del picco. Inserisci a (semilarghezza sinistra) e b (semilarghezza destra) misurate al 5% o 10% dell'altezza del picco.
📚 Riferimenti (Chicago Author-Date)
USP General Chapter <621>. 2024. "Chromatography." United States Pharmacopeial Convention. [link ↗] — Defines USP Tailing Factor T = (a+b)/(2a) measured at 5% peak height.
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).
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).
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.
Dolan, John W.. 2003. "Peak tailing and resolution." LCGC North America 21: 610-614 [link ↗] — How tailing factor degrades effective resolution.
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.
Kromidas, Stavros. 2017. "HPLC Made to Measure: A Practical Handbook for Optimization." Wiley-VCH. — Practical Tf and As thresholds for routine QC.
Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." Wiley. https://doi.org/10.1002/9781119313793 [link ↗]
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 ↗]
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 ↗]
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 ↗]
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 ↗]
Engelhardt, Heinz. 2014. "100 Years of Chromatography." Wiley-VCH.
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 ↗]
📊 Calcolatore di risoluzione e numero di piatti (Rs, N, H)
Calcola la risoluzione Rs, il numero di piatti teorici N e l'HETP (H) per una coppia di picchi HPLC. Inserisci i tempi di ritenzione, le larghezze dei picchi (al 50% o alla base) e la lunghezza della colonna.
📚 Riferimenti (Chicago Author-Date)
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).
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.
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.
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.
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).
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.
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 ↗]
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 ↗]
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 ↗]
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 ↗]
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 ↗]
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 ↗]
Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH. ISBN 978-3-527-33473-5.
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 ↗]
🧪 System Suitability — calcolatore live (USP <621>)
Inserisci i dati di 5-6 iniezioni (areas, tr, tailing, plates) — il calcolatore calcolerà %RSD, le medie e verificherà la conformità con USP <621>. Puoi incollare un CSV (separato da virgole) o modificare i singoli valori.
📚 Riferimenti (Chicago Author-Date)
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.
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.
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.
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).
Heyden, Yvan Vander, et al.. 2009. "Robustness of pharmaceutical liquid chromatographic methods." — Robustness vs. system suitability — design-of-experiments framework.
Rozet, Eric, et al.. 2013. "Analysis of recent pharmaceutical regulatory documents on analytical method validation."
European Medicines Agency (EMA). 2011. "Guideline on bioanalytical method validation EMEA/CHMP/EWP/192217/2009." EMA. [link ↗] — EMA companion guideline with bioanalytical SS criteria.
Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists." 2nd ed. Wiley. — UHPLC-specific suitability adjustments (n=5 vs. n=6).
Kazakevich, Yuri V., and Rosario LoBrutto, eds.. 2007. "HPLC for Pharmaceutical Scientists." Wiley-Interscience.
AOAC International. 2016. "Appendix F: Guidelines for Standard Method Performance Requirements." AOAC INTERNATIONAL. [link ↗] — Alternative SS thresholds for food/dietary samples.
Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial."
Carr, Peter W.. 2009. "The new physical chemistry of HPLC."
Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations."
Engelhardt, Heinz. 2014. "100 Years of Chromatography." 2nd ed. Wiley-VCH.
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography."
⚗️ Jonizacja w funkcji pH (Henderson-Hasselbalch)MolGod_PHION_1
Typ: Kwas · pKa: 4.1 · pKa2: 11.6
pH
% jonowy
% niejonowy
0
0.0 %
100.0 %
2
0.8 %
99.2 %
4
44.3 %
55.7 %
6
98.8 %
1.2 %
8
100.0 %
0.0 %
10
100.0 %
0.0 %
12
100.0 %
0.0 %
14
100.0 %
0.0 %
Źródła dla tej substancji (10)
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 54670067 — 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 54670067.
DrugBank DB00126 — link 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. DrugBank ID DB00126.
ChEMBL CHEMBL196 — 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 CHEMBL196.
KEGG COMPOUND C00072 — link 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.
IUPAC Serjeant, E. P., and Boyd Dempsey. 1979. Ionisation Constants of Organic Acids in Aqueous Solution. IUPAC Chemical Data Series No. 23. Oxford: Pergamon Press.
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.
📈 Predittore dello spettro UV-VIS (200-400 nm)λmax 243 nmMolGod_UVVIS_1
Composto
Ascorbic acid (Vitamin C)
λmax
243 nm
λmin
220 nm
εmax (M⁻¹·cm⁻¹)
7,700
Solvente (query)
water
Solvente (riferimento)
water (pH 2)
Concentration (M)
1e-4
Lunghezza del cammino ottico (cm)
1
FWHM della curva
46 nm
Modello: curva gaussiana centrata su λmax con scalatura secondo Beer-Lambert A = ε · c · l. Trasmittanza T = 10^(-A) · 100%.
📚 Riferimenti scientifici (Chicago Author-Date)
Ke Z; Zhang Y; Jiang X; Luo J; Chen H; Ma Y. 2026. "Ascorbic acid enhances antidepressant-like efficacy of esketamine: Hippocampal TARP-γ8-containing AMPA receptors mediate synaptic modulation." Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics. https://doi.org/10.1016/j.neurot.2025.e00786. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI]
Zou Y; Zhang M; Zhou D; Chi C; Wu F; Ding CF. 2025. "Identification and characterization of chiral vitamin C using ion mobility and theoretical calculation." Analytical and bioanalytical chemistry. https://doi.org/10.1007/s00216-025-05855-7. [DOI]
Tarhouchi S; Hlaibi M. 2024. "Kinetic control aspects and mechanisms in oriented membrane processes for extraction and recovery of ascorbic acid compound." Environmental science and pollution research international. https://doi.org/10.1007/s11356-024-35453-6. [DOI]
Begimbetova D; Burska AN; Baltabekova A; Kussainova A; Kukanova A; Fazyl F. 2024. "The Vitamin C Enantiomers Possess a Comparable Potency in the Induction of Oxidative Stress in Cancer Cells but Differ in Their Toxicity." International journal of molecular sciences. https://doi.org/10.3390/ijms25052531. [DOI]
Li J; Du N; Guan R; Zhao S. 2023. "Construction of a Chiral Fluorescent Probe for Tryptophan Enantiomers/Ascorbic Acid Identification." ACS applied materials & interfaces. https://doi.org/10.1021/acsami.3c02423. [tło tematyczne — CAS niezweryfikowany w tej publikacji] [DOI]
Maneffa AJ, Harrison AB, Radford SJ, Whitehouse AS, Clark JH, Matharu AS.. 2020. "Deep Eutectic Solvents Based on Natural Ascorbic Acid Analogues and Choline Chloride." . https://doi.org/10.1002/open.202000020. [DOI]
el-Hady DA; Gotti R; el-Maali NA. 2008. "Selective determination of catechin, epicatechin and ascorbic acid in human urine using chiral capillary electrophoresis." Journal of separation science. https://doi.org/10.1002/jssc.200700638. [DOI]
Grisar JM; Marciniak G; Bolkenius FN; Verne-Mismer J; Wagner ER. 1995. "Cardioselective ammonium, phosphonium, and sulfonium analogues of alpha-tocopherol and ascorbic acid that inhibit in vitro and ex vivo lipid peroxidation and scavenge superoxide radicals." Journal of medicinal chemistry. https://doi.org/10.1021/jm00015a010. [DOI]
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]
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]
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.
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.
Field, Leslie D., Sev Sternhell, and John R. Kalman. 2013. "Organic Structures from Spectra." 5th ed. Chichester: Wiley. ISBN 978-1-119-96582-6.
Reusch, William. 2013. "Virtual Textbook of Organic Chemistry: Spectroscopy." East Lansing, MI: Michigan State University.
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.
Kalsi, P. S. 2010. "Spectroscopy of Organic Compounds." 6th ed. New Delhi: New Age International. ISBN 978-81-224-2032-9.
Williams, Dudley H., and Ian Fleming. 2008. "Spectroscopic Methods in Organic Chemistry." 6th ed. London: McGraw-Hill. ISBN 978-0-07-711559-0.
Sadek, Paul C. 2002. The HPLC Solvent Guide. 2nd ed. Hoboken: Wiley. ISBN 978-0-471-41242-2.
Banwell, Colin N., and Elaine M. McCash. 1994. "Fundamentals of Molecular Spectroscopy." 4th ed. London: McGraw-Hill. ISBN 978-0-07-707976-1.
Perkampus, Heinz-Helmut. 1992. UV-VIS Spectroscopy and Its Applications. Berlin: Springer. https://doi.org/10.1007/978-3-642-77479-9.
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]
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]
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.
Lambert, Johann Heinrich. 1760. Photometria. Augsburg: Sumptibus Vidae.
🔍 Conferma tramite fonti indipendenti SINGLEλmax = 245 nm (1 sources, ±5 nm)
🗃️ database
Kim, Sunghwan, et al. 2023. "PubChem 2023 update." Nucleic Acids Research 51 (D1): D1373-D1380. https://doi.org/10.1093/nar/gkac956. UV spectrum data for CAS 50-81-7 sourced from Hazardous Substances Data Bank (HSDB). PubChem CID: 54670067. Accessed 2026. λ=245 nm
📚 textbook
Dulski, Thomas R.. 2017. "UV/Visible Molecular Absorption Spectrophotometry." Trace Elemental Analysis of Metals: 177-252. https://doi.org/10.1201/9780203735299-5. [DOI]
📚 textbook
Anonymous. 1989. "Some Applications of Uv and Vis Spectrophotometry." Studies in Analytical Chemistry: 260-303. https://doi.org/10.1016/b978-0-444-98882-9.50012-8. [DOI]
📚 textbook
Anonymous. 1989. "Basis of Spectrophotometry in the Uv and Vis Regions." Studies in Analytical Chemistry: 13-46. https://doi.org/10.1016/b978-0-444-98882-9.50005-0. [DOI]
Stereochemia, skręcalność właściwa i rekomendowana kolumna chiralna HPLC dla CAS 50-81-7 (CIP per Cahn-Ingold-Prelog 1966).
Dati predittivi — configurazione CIP determinata dalla struttura SMILES. La rotazione specifica e la scelta della colonna sono valori stimati. Verificare con ChemSpider/PubChem e con lo spettro CD prima dell'impiego analitico.
Centra stereogeniczne
2
Konfiguracja
(S) — konfiguracja absolutna (CIP)
Skręcalność właściwa [α]D20
23.00°
(+) prawoskrętne • rozp.: H2O • c=1, 23°C
Rekomendowana kolumna HPLC
Chiralpak IC
Faza ruchoma (eluent)
MeCN / H2O / TFA 70:30:0.1
Bibliografia (Chicago autore-data)
Eliel, Ernest L., Samuel H. Wilen, and Lewis N. Mander. 1994. "Stereochemistry of Organic Compounds." New York: Wiley.
Cahn, Robert S., Christopher Ingold, and Vladimir Prelog. 1966. "Specification of Molecular Chirality." Angewandte Chemie International Edition 5 (4): 385-415. https://doi.org/10.1002/anie.196603851.
Francotte, Eric, and Wolfgang Lindner, eds. 2006. "Chirality in Drug Research." Weinheim: Wiley-VCH.
U.S. FDA. 1992. "FDA's Policy Statement for the Development of New Stereoisomeric Drugs." Chirality 4 (5): 338-340. https://doi.org/10.1002/chir.530040513.
Patani, George A., and Edmond J. LaVoie. 1996. "Bioisosterism: A Rational Approach in Drug Design." Chemical Reviews 96 (8): 3147-3176.
Meanwell, Nicholas A. 2011. "Synopsis of Some Recent Tactical Application of Bioisosteres in Drug Design." Journal of Medicinal Chemistry 54 (8): 2529-2591.
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.
Easson, Leslie H., and Edgar Stedman. 1933. "Studies on the relationship between chemical constitution and physiological action: molecular dissymmetry and physiological activity." Biochemical Journal 27 (4): 1257-1266. https://doi.org/10.1042/bj0271257.
Pirkle, William H., and Thomas C. Pochapsky. 1989. "Considerations of chiral recognition relevant to the liquid chromatography separation of enantiomers." Chemical Reviews 89 (2): 347-362. https://doi.org/10.1021/cr00092a006.
Dale, James A., and Harry S. Mosher. 1973. "Nuclear magnetic resonance enantiomer reagents: configurational correlations via nuclear magnetic resonance chemical shifts of diastereomeric mandelate, O-methylmandelate, and α-methoxy-α-trifluoromethylphenylacetate (MTPA) esters." Journal of the American Chemical Society 95 (2): 512-519. https://doi.org/10.1021/ja00783a034.
Beesley, Thomas E., and Raymond P. W. Scott. 1998. Chiral Chromatography. Chichester: John Wiley & Sons.
Allenmark, Stig G. 1991. Chromatographic Enantioseparation: Methods and Applications. 2nd ed. New York: Ellis Horwood.
Wainer, Irving W., ed. 1993. Drug Stereochemistry: Analytical Methods and Pharmacology. 2nd ed. New York: Marcel Dekker.
Aboul-Enein, Hassan Y., and Irving W. Wainer, eds. 1997. The Impact of Stereochemistry on Drug Development and Use. New York: John Wiley & Sons.
Ahuja, Satinder, ed. 2000. Chiral Separations by Liquid Chromatography. ACS Symposium Series 471. Washington, DC: American Chemical Society.
Maier, Norbert M., Pilar Franco, and Wolfgang Lindner. 2001. "Separation of enantiomers: needs, challenges, perspectives." Journal of Chromatography A 906 (1-2): 3-33. https://doi.org/10.1016/S0021-9673(00)00532-X.
Schurig, Volker. 2001. "Separation of enantiomers by gas chromatography." Journal of Chromatography A 906 (1-2): 275-299. https://doi.org/10.1016/S0021-9673(00)00505-7.
Okamoto, Yoshio, and Eiji Yashima. 1998. "Polysaccharide derivatives for chromatographic separation of enantiomers." Angewandte Chemie International Edition 37 (8): 1020-1043. https://doi.org/10.1002/(SICI)1521-3773(19980504)37:8<1020::AID-ANIE1020>3.0.CO;2-5.
Lämmerhofer, Michael. 2010. "Chiral recognition by enantioselective liquid chromatography: mechanisms and modern chiral stationary phases." Journal of Chromatography A 1217 (6): 814-856. https://doi.org/10.1016/j.chroma.2009.10.022.
Caner, Hava, Eli Groner, Liron Levy, and Israel Agranat. 2004. "Trends in the development of chiral drugs." Drug Discovery Today 9 (3): 105-110. https://doi.org/10.1016/S1359-6446(03)02904-0.
Agranat, Israel, Hava Caner, and John Caldwell. 2002. "Putting chirality to work: the strategy of chiral switches." Nature Reviews Drug Discovery 1 (10): 753-768. https://doi.org/10.1038/nrd915.
Crosby, John. 1991. "Synthesis of optically active compounds: a large-scale perspective." Tetrahedron 47 (27): 4789-4846. https://doi.org/10.1016/S0040-4020(01)80950-6.
Nguyen, Lien Ai, Hua He, and Chuong Pham-Huy. 2006. "Chiral drugs: an overview." International Journal of Biomedical Science 2 (2): 85-100.
Eriksson, Tommy, Sven Björkman, and Peter Höglund. 2001. "Clinical pharmacology of thalidomide." European Journal of Clinical Pharmacology 57 (5): 365-376. https://doi.org/10.1007/s002280100320.
Evans, Andrew M. 2007. "Comparative pharmacology of S(+)-ibuprofen and (RS)-ibuprofen." Clinical Rheumatology 20 (Suppl 1): S9-S14. https://doi.org/10.1007/BF03342661.
IUPAC. 1996. "Basic terminology of stereochemistry (IUPAC recommendations 1996)." Pure and Applied Chemistry 68 (12): 2193-2222. https://doi.org/10.1351/pac199668122193.
Mislow, Kurt, and Jay Siegel. 1984. "Stereoisomerism and local chirality." Journal of the American Chemical Society 106 (11): 3319-3328. https://doi.org/10.1021/ja00323a043.
Francotte, Eric R. 2001. "Enantioselective chromatography as a powerful alternative for the preparation of drug enantiomers." Journal of Chromatography A 906 (1-2): 379-397. https://doi.org/10.1016/S0021-9673(00)00951-1.
Welch, Christopher J. 1994. "Evolution of chiral stationary phase design in the Pirkle laboratories." Journal of Chromatography A 666 (1-2): 3-26. https://doi.org/10.1016/0021-9673(94)80367-6.
Armstrong, Daniel W., Yibing Tang, Shengsheng Chen, et al. 1994. "Macrocyclic antibiotics as a new class of chiral selectors for liquid chromatography." Analytical Chemistry 66 (9): 1473-1484. https://doi.org/10.1021/ac00081a019.
Pirkle, William H., Donn W. House, and Jerald M. Finn. 1980. "Broad spectrum resolution of optical isomers using chiral high-performance liquid chromatographic bonded phases." Journal of Chromatography A 192 (1): 143-158. https://doi.org/10.1016/S0021-9673(80)80043-3.
European Directorate for the Quality of Medicines & HealthCare. 2024. European Pharmacopoeia 11.5: Chapter 2.2.7 Optical rotation. Strasbourg: EDQM Council of Europe.
United States Pharmacopeial Convention. 2024. USP-NF General Chapter <781> Optical Rotation. Rockville, MD: USP.
Gal, Joseph. 2017. "Pasteur and the art of chirality." Nature Chemistry 9 (7): 604-605. https://doi.org/10.1038/nchem.2790.
Pasteur, Louis. 1848. "Mémoire sur la relation qui peut exister entre la forme cristalline et la composition chimique, et sur la cause de la polarisation rotatoire." Comptes rendus de l'Académie des sciences 26: 535-538.
Le Bel, Joseph A. 1874. "Sur les relations qui existent entre les formules atomiques des corps organiques et le pouvoir rotatoire de leurs dissolutions." Bulletin de la Société Chimique de France 22: 337-347.
van 't Hoff, Jacobus Henricus. 1874. "Voorstel tot uitbreiding der tegenwoordige in de scheikunde gebruikte structuur-formules in de ruimte, benevens een daarmede samenhangende opmerking omtrent het verband tusschen optisch actief vermogen en chemische constitutie van organische verbindingen." Utrecht: J. Greven.
PUBZou Y; Zhang M; Zhou D; Chi C; Wu F; Ding CF. 2025. "Identification and characterization of chiral vitamin C using ion mobility and theoretical calculation." Analytical and bioanalytical chemistry. https://doi.org/10.1007/s00216-025-05855-7.
PUBTarhouchi S; Hlaibi M. 2024. "Kinetic control aspects and mechanisms in oriented membrane processes for extraction and recovery of ascorbic acid compound." Environmental science and pollution research international. https://doi.org/10.1007/s11356-024-35453-6.
PUBBegimbetova D; Burska AN; Baltabekova A; Kussainova A; Kukanova A; Fazyl F. 2024. "The Vitamin C Enantiomers Possess a Comparable Potency in the Induction of Oxidative Stress in Cancer Cells but Differ in Their Toxicity." International journal of molecular sciences. https://doi.org/10.3390/ijms25052531.
EURManeffa AJ, Harrison AB, Radford SJ, Whitehouse AS, Clark JH, Matharu AS.. 2020. "Deep Eutectic Solvents Based on Natural Ascorbic Acid Analogues and Choline Chloride." . https://doi.org/10.1002/open.202000020.
PUBel-Hady DA; Gotti R; el-Maali NA. 2008. "Selective determination of catechin, epicatechin and ascorbic acid in human urine using chiral capillary electrophoresis." Journal of separation science. https://doi.org/10.1002/jssc.200700638.
PUBGrisar JM; Marciniak G; Bolkenius FN; Verne-Mismer J; Wagner ER. 1995. "Cardioselective ammonium, phosphonium, and sulfonium analogues of alpha-tocopherol and ascorbic acid that inhibit in vitro and ex vivo lipid peroxidation and scavenge superoxide radicals." Journal of medicinal chemistry. https://doi.org/10.1021/jm00015a010.
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📚 RIFERIMENTI (Bibliografia complessiva, Chicago Author-Date) 109 elementi
Tutte le fonti scientifiche citate negli accordion sopra per il CAS 50-81-7.Formato: Chicago Manual of Style 17ª ed., sistema Author-Date.
AIST. 2026. Spectral Database for Organic Compounds (SDBS): CAS 50-81-7. Tsukuba, Japan: National Institute of Advanced Industrial Science and Technology. https://sdbs.db.aist.go.jp/. (Accessed 2026-11-12.)
PubChem. 2026. PubChem Compound Summary: CAS 50-81-7. Bethesda, MD: National Center for Biotechnology Information (NCBI), National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/#query=50-81-7. (Accessed 2026-11-12.)
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.
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.
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.
IARC. 2026. IARC Monographs on the Identification of Carcinogenic Hazards to Humans: CAS 50-81-7. Lyon, France: International Agency for Research on Cancer, World Health Organization. (Accessed 2026-11-12.)
📄 Articoli scientifici (peer-reviewed)
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.
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.
European Parliament. 2008. "Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures (CLP)." Official Journal of the European Union L 353: 1–1355.
United Nations. 2021. Globally Harmonized System of Classification and Labelling of Chemicals (GHS). 9th revised ed. ST/SG/AC.10/30/Rev.9. New York and Geneva: United Nations. https://unece.org/ghs-rev9-2021.
U.S. OSHA. 2026. "Occupational Safety and Health Guidance: CAS 50-81-7." Washington, DC: U.S. Occupational Safety and Health Administration. https://www.osha.gov/hazwoper. (Accessed 2026-11-12.)
National Fire Protection Association (2018) — NFPA 472: Standard for Competence of Responders to Hazardous Materials/Weapons of Mass Destruction Incidents https://www.nfpa.org/codes-and-standards/nfpa-472.
U.S. National Institute for Occupational Safety and Health (2024) — NIOSH Pocket Guide to Chemical Hazards https://www.cdc.gov/niosh/npg/.
Snyder, Lloyd R., John W. Dolan, and Joseph J. Kirkland. 2010. Introduction to Modern Liquid Chromatography. Wiley.
Schoenmakers, Peter J.. 1986. Optimization of Chromatographic Selectivity: A Guide to Method Development. Elsevier.
Snyder, L. R., and J. W. Dolan. 2007. High-Performance Gradient Elution: The Practical Application of the Linear-Solvent-Strength Model. Wiley.
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. https://doi.org/10.1016/j.chroma.2008.10.005.
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.
Engelhardt, Heinz. 2014. 100 Years of Chromatography. Wiley-VCH.
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.
Van Deemter, J. J., F. J. Zuiderweg, and A. Klinkenberg. 1956. "Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography." https://doi.org/10.1016/0009-2509(56)80003-1.
Giddings, J. Calvin. 1965. "Dynamics of Chromatography, Part I: Principles and Theory." Marcel Dekker.
Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." https://doi.org/10.1002/jssc.200700026.
Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. "Practical HPLC Method Development." Wiley.
Vivó-Truyols, Gabriel, and Hans-Gerd Janssen. 2010. "Probabilistic approach to peak deconvolution in chromatography." https://doi.org/10.1021/ac101742z.
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