Description
Naphthol-4-sulfonic acid(Winther’s acid)Details
Chemical Name:Naphthol-4-sulfonic acid (Winther’s acid)
CAS No.: 84-87-7
Molecular Formula: C10H8O4S
Molecular Weight:224.23
MolecularStructure:
Appearance:Grayish-white powder
Naphthol-4-sulfonic acid(Winther’s acid)Typical Properties
Item
Standard
Appearance
Grayish-white powder
Assay％
70%min.
Sodium Naphthionate ％
1.2%max
SO2 (%)
0.30%max
Melting point
170℃
Density
1.4643 (rough estimate)
Naphthol-4-sulfonic acid(Winther’s acid)Usage
1.Used as an intermediate of azo dyes
2.Used to prepare direct copper blue BR and 2R, direct purple RB, acid red B and acid medium bordeaux B dyes.
Naphthol-4-sulfonic acid(Winther’s acid)Packaging and Shipping
Packing: 25kg/bag by air or by sea or by courier.
Naphthol-4-sulfonic acid(Winther’s acid)Storage
It shall be stored in a cool and dry place away from sunlight.
