1-Diazo-2-naphthol-4-sulfonic acid

Also known as: 1,2-Naphthoxydiazo-4-sulfonic acid, 1,2-Naphthoxydiazde-4-sulfonic acid, 1-Naphthalenediazonium,2-hydroxy-4-sulfo-,inner salt, 2-Hydroxy-4-sulfo-1-naphthalenediazonium hydroxide, inner salt, 2-Hydroxy-4-sulfonato-1-naphthalenediazonium, 2-hydroxy-4-sulfo-naphthalene-1-diazonium-betaine, 4-Diazo-3-hydroxy-3,4-dihydro-1-naphthalenesulfonic acid, 4-Diazo-3-hydroxy-3,4-dihydronaphthalene-1-sulfonic acid, 4-Diazonio-3-hydroxy-naphthalin-1-sulfonat, 4-Diazonio-3-hydroxynaphthalene-1-sulfonate, 1-Diazo-2-naphthol-4-sulphonic acid, 1-Diazo-2-naphthol-4-sulfonic acid hydrate

1-Diazo-2-naphthol-4-sulfonic acid (CAS 887-76-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H6N2O4S and a molecular weight of 252.247 g/mol. Key properties include a melting point of 160 °C (dec.)(lit.), a boiling point of 160ºC and a flash point of 微溶于水，溶于碱。. It is classified under GHS with signal word Danger and hazard statements H228 and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.

887-76-3

Jingsj CID

J-1440371-0

Molecular Formula

C₁₀H₆N₂O₄S

Molecular Weight

252.247 g/mol

Category

Organic Acids

Last updated

11/2/2026