Product Identification

Product Name

4-Hydroxy-1-naphthalenesulfonic acid

Synonyms

1,4-Oxy Acid
1-Hydroxy-4-naphthalenesulfonic acid
1-Naphthalenesulfonic acid, 4-hydroxy-
1-Naphthol-4-sulfonic acid
a-Naphthol-4-sulfonic acid
Nevile and Winther's acid

CAS

84-87-7

Formula

C10H8O4S

Molecular Weight

224.24

EINECS

201-568-4

Merck

12,6478

Beilstein/Gmelin

2214801

Beilstein Reference

4-11-00-00614

Physical and Chemical Properties

Solubility in water

Very soluble

Melting Point

170

Boiling Point

427

Density

1.55 g/cm3

pKa/pKb

0.73 (pKa)

Partition Coefficient

-.44

Usage

Preparation of azo dyes.