1-Naphthol-5-sulfonic acid

Also known as: 1-Naphthalenesulfonic acid, 5-hydroxy-, 5-Hydroxy-1-naphthalenesulfonic acid, 5-Hydroxynaphthalene-1-sulfonic acid, 1-Hydroxynaphthalene-5-sulfonic acid, L acid, L- acid

1-Naphthol-5-sulfonic acid (CAS 117-59-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H8O4S and a molecular weight of 224.23300 g/mol. Key properties include a melting point of 110~112℃, a boiling point of 228.7±29.0°C and a density of 1.549 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 117-59-9
Jingsj CID: J-1990611-7
Molecular Formula: C₁₀H₈O₄S
Molecular Weight: 224.23300 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	110~112℃
Boiling Point	228.7±29.0°C
Density	1.549 g/cm3
Exact Mass	224.01400
PSA	82.98000
LogP	2.87290
Refractive Index	1.703

Customs & Trade Information

HS Code	2908999090
Summary	2908999090 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 1-Naphthol-5-sulfonic acid?

The CAS number of 1-Naphthol-5-sulfonic acid is 117-59-9.

What are the molecular formula and molecular weight of 1-Naphthol-5-sulfonic acid?

1-Naphthol-5-sulfonic acid has molecular formula C10H8O4S and molecular weight 224.23300 g/mol.

What are the upstream and downstream products of 1-Naphthol-5-sulfonic acid?

For 1-Naphthol-5-sulfonic acid, Upstream Products: 5-Amino-1-naphthalenesulfonic acid, 1,5-Naphthalenedisulfonic acid; Downstream Products: 1-Naphthol, 4-Amino-1-naphthol, 2,6-Dihydroxybenzoic 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. "1-Naphthol-5-sulfonic acid (CAS 117-59-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1990611-7 (accessed 2026-11-06).

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