5-Chlorosulfonyl-2-methoxybenzoic acid

Also known as: 5-chlorosulphonyl-2-anisic acid, 2-Methoxy-5-(chlorosulfonyl)benzoic acid, 3-Carboxy-4-methoxybenzenesulphonyl chloride, 3-Carboxy-4-methoxybenzenesuofonyl chloride, 2-Carboxy-4-(chlorosulphonyl)anisole, Benzoic acid, 5-(chlorosulfonyl)-2-methoxy-, EINECS 257-507-7, Einecs 257-507-7, Salicylic Acid Impurity 15, Sulpride impurity 7, Tiapride impurity 10, 5-Chlorosulfonyl-2-MethoxybenzoicAci

5-Chlorosulfonyl-2-methoxybenzoic acid (CAS 51904-91-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7ClO5S and a molecular weight of 250.65600 g/mol. Key properties include a boiling point of 441.8ºC at 760 mmHg, a density of 1.541g/cm3 and a flash point of 221ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51904-91-7
Jingsj CID: J-12356-8
Molecular Formula: C₈H₇ClO₅S
Molecular Weight: 250.65600 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	441.8ºC at 760 mmHg
Density	1.541g/cm3
Flash Point	221ºC
Exact Mass	249.97000
PSA	89.05000
LogP	2.40170
Refractive Index	1.565

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 5-Chlorosulfonyl-2-methoxybenzoic acid?

The CAS number of 5-Chlorosulfonyl-2-methoxybenzoic acid is 51904-91-7.

What are the molecular formula and molecular weight of 5-Chlorosulfonyl-2-methoxybenzoic acid?

5-Chlorosulfonyl-2-methoxybenzoic acid has molecular formula C8H7ClO5S and molecular weight 250.65600 g/mol.

What are the upstream and downstream products of 5-Chlorosulfonyl-2-methoxybenzoic acid?

For 5-Chlorosulfonyl-2-methoxybenzoic acid, Upstream Products: 2-Methoxybenzoic acid, 4-Methoxybenzoic acid; Downstream Products: 2-Methoxy-5-(methylsulfonyl)benzoic acid, 2-Methoxy-5-sulfamoylbenzoic acid, 5-(methylthio)-o-anisic acid.

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

Last updated: 8/21/2026

How to cite: Jingsj. "5-Chlorosulfonyl-2-methoxybenzoic acid (CAS 51904-91-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-12356-8 (accessed 2026-11-09).

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