2-Chlorobenzoic acid
Also known as: o-Chlorobenzoic acid, 2-CBA, OCBA, 2-Chlorobenzoate, Benzoic acid, 2-chloro-, Benzoic acid, o-chloro-, Mesalamine Impurity L, Mesalazine Impurity 20, 2-Chlorobenzoic Acid Zone Refined (number of passes:20), EINECS 204-285-4, MFCD00002412, UNII-8P0867193V
2-Chlorobenzoic acid (CAS 118-91-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H5ClO2 and a molecular weight of 156.566 g/mol. Key properties include a melting point of 138-140 °C(lit.), a boiling point of 275.7±13.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 120.5±19.8 °C. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 118-91-2
- Jingsj CID
- J-33610-7
- Molecular Formula
- C7H5ClO2
- Molecular Weight
- 156.566 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 138-140 °C(lit.) |
|---|---|
| Boiling Point | 275.7±13.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 120.5±19.8 °C |
| Exact Mass | 155.997803 |
| PSA | 37.30000 |
| LogP | 2.04 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.583 |
| Additional Property | soluble in hot water |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
Customs & Trade Information
| HS Code | 2916399090 |
|---|---|
| Summary | 2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Chlorobenzoic acid?
The CAS number of 2-Chlorobenzoic acid is 118-91-2.
What are the molecular formula and molecular weight of 2-Chlorobenzoic acid?
2-Chlorobenzoic acid has molecular formula C7H5ClO2 and molecular weight 156.566 g/mol.
Is 2-Chlorobenzoic acid hazardous?
2-Chlorobenzoic acid has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
What are the upstream and downstream products of 2-Chlorobenzoic acid?
For 2-Chlorobenzoic acid, Upstream Products: 2-Chlorobenzyl alcohol, Ethyl L-tyrosinate, 2-Chlorobenzoyl chloride; Downstream Products: 2-Chloro-5-(piperidin-1-ylsulfonyl)benzoic acid, 2'-Chloro-2-hydroxy-4-methylbenzophenone, 2-Chloro-N-(4-hydroxyphenyl)benzamide.
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-Chlorobenzoic acid (CAS 118-91-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33610-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.