o-Cresolsulfonic acid

Also known as: 4-Hydroxy-3-methylbenzenesulfonic acid, 2-Methylphenol-4-sulfonic acid, o-Cresol-4-sulfonic acid, 2-Cresol sulfonic acid, 3-Methyl-4-hydroxybenzenesulfonic acid

o-Cresolsulfonic acid (CAS 7134-04-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H8O4S and a molecular weight of 188.201 g/mol. Key property: a density of 1.5±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7134-04-5
Jingsj CID: J-1010628-2
Molecular Formula: C₇H₈O₄S
Molecular Weight: 188.201 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Density	1.5±0.1 g/cm3
Exact Mass	188.014328
PSA	82.98000
LogP	-1.21
Refractive Index	1.597

Customs & Trade Information

HS Code	2904100000
Summary	2904100000 derivatives containing only sulpho groups, their salts and ethyl esters。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of o-Cresolsulfonic acid?

The CAS number of o-Cresolsulfonic acid is 7134-04-5.

What are the molecular formula and molecular weight of o-Cresolsulfonic acid?

o-Cresolsulfonic acid has molecular formula C7H8O4S and molecular weight 188.201 g/mol.

What are the upstream and downstream products of o-Cresolsulfonic acid?

For o-Cresolsulfonic acid, Upstream Products: o-Cresol; Downstream Products: p-Toluquinone, 4-Chloro-2-methylphenol, 2,4-Dichloro-6-methylphenol.

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. "o-Cresolsulfonic acid (CAS 7134-04-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1010628-2 (accessed 2026-11-09).

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