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3-Chloro-4-hydroxybenzoic acid

Also known as: 3-chloro-4-hydroxybenzoate, 4-hydroxy-3-chlorobenzoic acid, NSC 21186, m-chloro-p-hydroxybenzoic acid, Benzoic acid, 3-chloro-4-hydroxy-

3-Chloro-4-hydroxybenzoic acid (CAS 3964-58-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H5ClO3 and a molecular weight of 172.566 g/mol. Key properties include a melting point of 171-173 °C(lit.), a boiling point of 330.5±27.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 153.7±23.7 °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.
3964-58-7
Jingsj CID
J-1504913-5
Molecular Formula
C7H5ClO3
Molecular Weight
172.566 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point171-173 °C(lit.)
Boiling Point330.5±27.0 °C at 760 mmHg
Density1.5±0.1 g/cm3
Flash Point153.7±23.7 °C
Exact Mass171.992722
PSA57.53000
LogP2.39
Vapor Pressure0.0±0.8 mmHg at 25°C
Refractive Index1.630

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 3-Chloro-4-hydroxybenzoic acid?

The CAS number of 3-Chloro-4-hydroxybenzoic acid is 3964-58-7.

What are the molecular formula and molecular weight of 3-Chloro-4-hydroxybenzoic acid?

3-Chloro-4-hydroxybenzoic acid has molecular formula C7H5ClO3 and molecular weight 172.566 g/mol.

Is 3-Chloro-4-hydroxybenzoic acid hazardous?

3-Chloro-4-hydroxybenzoic 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 3-Chloro-4-hydroxybenzoic acid?

For 3-Chloro-4-hydroxybenzoic acid, Upstream Products: 4-Hydroxybenzoic acid, 3-chloro-4-hydroxybenzonitrile, Carbon tetrachloride; Downstream Products: Methyl 3-chloro-4-methoxybenzoate, 3-Chloro-4-methoxybenzoic acid, 3,5-Dichloro-4-hydroxybenzoic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "3-Chloro-4-hydroxybenzoic acid (CAS 3964-58-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1504913-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.