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Odczynnik chemiczny do zastosowan laboratoryjnych. CAS 88-99-3.
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| Molecular formula | C8H6O4[1] |
| Molecular weight | 166.13 g/mol[1] |
| Density | 1.6 g/cm³[1] |
| LogP (lipophilicity) | 0.7[1] |
| IUPAC name | phthalic acid[1] |
| SMILES | C1=CC=C(C(=C1)C(=O)O)C(=O)O[1] |
| InChIKey | XNGIFLGASWRNHJ-UHFFFAOYSA-N[1] |
Synonyms: phthalic acid · 88-99-3 · 1,2-benzenedicarboxylic acid · o-phthalic acid · benzene-1,2-dicarboxylic acid
Data sources: PubChem (NLM/NIH)
Last updated: 2026-08-07
| Property | Value | Unit | Conditions | Source |
|---|---|---|---|---|
| Density (ρ) | 1.6[1] | g/cm³ | 20 °C | No primary source |
| Melting Point (mp) | 410 to 211.1 °C (decomposes) (NTP, 1992)[1] | PubChem (NIH/NLM) ↗ | ||
| Boiling Point (bp) | Decomposes (NTP, 1992)[1] | PubChem (NIH/NLM) ↗ | ||
| Flash Point | 167.8 °C[1] | closed cup | No primary source | |
| Vapor Pressure | 0.00000064 [mmHg][1] | PubChem (NIH/NLM) ↗ | ||
| Water Solubility | 7.01 | g/L | 25 °C | No primary source |
C1=CC=C(C(=C1)C(=O)O)C(=O)O InChI=1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)
XNGIFLGASWRNHJ-UHFFFAOYSA-N
Data sources: PubChem (NIH/NLM)
Last updated: unconfirmed
Spectra are fetched on demand from 9 sources. Each spectrum is stored in our database — the next time it is opened there are zero requests to the external API. Download JCAMP-DX / CSV / PNG for every spectrum without searching.
Reference source — no public API. Open in an external database:
🔗 IR/NMR/MS (SDBS) →Reference source — no public API. Open in an external database:
🔗 JP Monograph →Reference source — no public API. Open in an external database:
🔗 WHO INN →Reference source — no public API. Open in an external database:
🔗 DOAJ →| Property | Value | Unit | Conditions | Source |
|---|---|---|---|---|
| Water solubility | 7.01 | g/L | 25°C | No primary source |
| Density (ρ) | 1.6 [1] | g/cm³ | 20°C | No primary source |
| Flash point | 167.8 [1] | °C | closed cup | No primary source |
| logP (octanol/water) | 0.7 [1] | — | 25°C | No primary source |
GHS/CLP classification — Regulation (EC) No 1272/2008 + UN GHS Rev. 9 (2021).
⚠ Classification based on a consensus of sources (PubChem / supplier notifications) — not verified against the harmonised classification in Annex VI (CLP). The scope of hazards may be broader than the official classification; verify against the supplier's current safety data sheet before use.
Translations: CLP Regulation (EC) 1272/2008, Annexes III and IV. Data: PubChem/NLM.
References collected from all Safety Hub tabs. CAS: 88-99-3 ·
PubChem ↗
Tabs with their own references (Emergency, PPE, Storage, Waste) contain additional bibliographic entries within their respective sections.
Paste a series of replicate measurements (CSV, or one number per line). The calculator computes the mean, standard deviation and 95% CI, and detects outliers (Grubbs + Dixon Q).
x̄ = Σxᵢ / n — arithmetic means² = Σ(xᵢ - x̄)² / (n-1) — sample variances = √s² — standard deviationRSD% = (s / x̄) × 100% — relative standard deviationCI₉₅ = x̄ ± t(0.05, n-1) × s / √n — Student's tG = |xᵢ - x̄| / s — Grubbs' testQ = |xsuspect - xnearest| / |xmax - xmin| — Dixon Q-testSource: ICH Q2(R2) Validation of Analytical Procedures · ICH PDF ↗
Choose a buffer from the list of 20 popular systems → enter the target pH → get an exact recipe with the masses to weigh out.
88-99-3
— multi-criteria ranking (W12): 30% citations · 20% recency · 20% topic · 15% historical · 15% open access.
All scientific sources cited in the accordions above for CAS 88-99-3. Format: Chicago Manual of Style 17th ed., Author-Date system.
Odczynnik chemiczny do zastosowan laboratoryjnych. CAS 88-99-3.