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Sodium 2-naphthol-7-sulfonate

Also known as: Sodium 7-hydroxy-2-naphthalenesulfonate, 2-Naphthol-7-sulfonic acid sodium salt, 7-Hydroxy-2-naphthalenesulfonic acid sodium salt, Cassella's acid sodium salt, F acid sodium salt, Sodium 2-naphthol-7-sulfonate hydrate, Sodium 7-hydroxynaphthalene-2-sulfonate, MFCD00021625, EINECS 205-200-3

Sodium 2-naphthol-7-sulfonate (CAS 135-55-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H7NaO4S and a molecular weight of 246.215 g/mol. Key property: a melting point of 225°C (dec.). No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
135-55-7
Jingsj CID
J-1325040-5
Molecular Formula
C10H7NaO4S
Molecular Weight
246.215 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point225°C (dec.)
Exact Mass245.996277
PSA85.81000
LogP2.53030

Customs & Trade Information

HS Code2908999090
Summary2908999090 halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols。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 Sodium 2-naphthol-7-sulfonate?

The CAS number of Sodium 2-naphthol-7-sulfonate is 135-55-7.

What are the molecular formula and molecular weight of Sodium 2-naphthol-7-sulfonate?

Sodium 2-naphthol-7-sulfonate has molecular formula C10H7NaO4S and molecular weight 246.215 g/mol.

What are the upstream and downstream products of Sodium 2-naphthol-7-sulfonate?

For Sodium 2-naphthol-7-sulfonate, Downstream Products: 7-methoxynaphthalene-2-sulfonyl 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. "Sodium 2-naphthol-7-sulfonate (CAS 135-55-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1325040-5 (accessed 2026-11-06).

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