2-Chloro-4-methoxybenzoic acid
Also known as: 2-Chloro-p-anisic acid, Benzoic acid, 2-chloro-4-methoxy-, 2-chloro-4-(methyloxy)benzoic acid, 4-methoxy-2-chloro-benzoic acid, 2-Chlor-4-methoxy-benzoesaeure, 2-Chlor-anissaeure, NSC 401833
2-Chloro-4-methoxybenzoic acid (CAS 21971-21-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7ClO3 and a molecular weight of 186.592 g/mol. Key properties include a boiling point of 303.0±22.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 137.1±22.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21971-21-1
- Jingsj CID
- J-1422092-9
- Molecular Formula
- C8H7ClO3
- Molecular Weight
- 186.592 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 303.0±22.0 °C at 760 mmHg |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 137.1±22.3 °C |
| Exact Mass | 186.008377 |
| PSA | 46.53000 |
| LogP | 2.34 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.562 |
Customs & Trade Information
| HS Code | 2918990090 |
|---|---|
| Summary | 2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Chloro-4-methoxybenzoic acid?
The CAS number of 2-Chloro-4-methoxybenzoic acid is 21971-21-1.
What are the molecular formula and molecular weight of 2-Chloro-4-methoxybenzoic acid?
2-Chloro-4-methoxybenzoic acid has molecular formula C8H7ClO3 and molecular weight 186.592 g/mol.
What are the upstream and downstream products of 2-Chloro-4-methoxybenzoic acid?
For 2-Chloro-4-methoxybenzoic acid, Upstream Products: 2-Chloro-4-fluorobenzoic acid, Sodium methoxide, 4-Methoxybenzoic acid; Downstream Products: 2-anilino-4-methoxybenzoic acid, 2-Chloro-4-hydroxybenzoic acid, 2-chloro-4-methoxybenzoyl chloride.
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-Chloro-4-methoxybenzoic acid (CAS 21971-21-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1422092-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.