2,3-Dihydroxybenzoic acid
Also known as: Pyrocatechuic acid, o-Pyrocatechuic acid, Catechol-3-carboxylic acid, Pyrocatechol-3-carboxylic acid, 2,3-Dihydroxybenzoate, 3-Hydroxysalicylic acid, Benzoic acid, 2,3-dihydroxy-
2,3-Dihydroxybenzoic acid (CAS 303-38-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H6O4 and a molecular weight of 154.120 g/mol. Key properties include a melting point of 204-206 °C(lit.), a boiling point of 362.5±32.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 187.2±21.6 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 303-38-8
- Jingsj CID
- J-44851-1
- Molecular Formula
- C7H6O4
- Molecular Weight
- 154.120 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 204-206 °C(lit.) |
|---|---|
| Boiling Point | 362.5±32.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 187.2±21.6 °C |
| Exact Mass | 154.026611 |
| PSA | 77.76000 |
| LogP | 1.80 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.671 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Grootveld M, et al. 2,3-Dihydroxybenzoic acid is a product of human aspirin metabolism. Biochem Pharmacol. 1988 Jan 15;37(2):271-80. |
Customs & Trade Information
| HS Code | 2918290000 |
|---|---|
| Summary | HS: 2918290000 other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) VAT:17.0% MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2,3-Dihydroxybenzoic acid?
The CAS number of 2,3-Dihydroxybenzoic acid is 303-38-8.
What are the molecular formula and molecular weight of 2,3-Dihydroxybenzoic acid?
2,3-Dihydroxybenzoic acid has molecular formula C7H6O4 and molecular weight 154.120 g/mol.
Is 2,3-Dihydroxybenzoic acid hazardous?
2,3-Dihydroxybenzoic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 2,3-Dihydroxybenzoic acid?
For 2,3-Dihydroxybenzoic acid, Upstream Products: 2,3-Dihydroxybenzonitrile, Ethyl 2,3-dihydroxybenzoate, 2,3-Dihydroxybenzaldehyde; Downstream Products: 3-(Benzoyloxy)-5-bromo-2-hydroxybenzoic acid, 3-(Benzoyloxy)-2-hydroxybenzoic acid, tert-Butyl 1,3-benzodioxol-4-ylcarbamate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,3-Dihydroxybenzoic acid (CAS 303-38-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44851-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.