1-Naphthol-4-sulfonic acid

Also known as: 4-hydroxy-1-naphthalenesulfonic acid, 4-hydroxynaphthalene-1-sulfonic acid, Nevile-Winthers acid, Neville and Winther acid, Nevile-Winther acid, α-Naphthol-4-sulfonic acid

1-Naphthol-4-sulfonic acid (CAS 84-87-7) 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 224.233 g/mol. Key properties include a melting point of 170℃, a boiling point of 427ºC and 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.: 84-87-7
Jingsj CID: J-29798-3
Molecular Formula: C₁₀H₈O₄S
Molecular Weight: 224.233 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	170℃
Boiling Point	427ºC
Density	1.5±0.1 g/cm3
Exact Mass	224.014328
PSA	82.98000
LogP	-0.44
Refractive Index	1.704

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-4-sulfonic acid?

The CAS number of 1-Naphthol-4-sulfonic acid is 84-87-7.

What are the molecular formula and molecular weight of 1-Naphthol-4-sulfonic acid?

1-Naphthol-4-sulfonic acid has molecular formula C10H8O4S and molecular weight 224.233 g/mol.

What are the upstream and downstream products of 1-Naphthol-4-sulfonic acid?

For 1-Naphthol-4-sulfonic acid, Upstream Products: 1,2-Dichlorobenzene, 1-Naphthol, 4-Amino-1-naphthalenesulfonic acid; Downstream Products: Acid Red 14, Martius Yellow, 1-Naphthol.

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-4-sulfonic acid (CAS 84-87-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29798-3 (accessed 2026-11-09).

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