naphthol-4-sulfonic acid cas 84-87-7

Chemical Name:Naphthol-4-sulfonic acid (Winther’s acid)
CAS No.: 84-87-7
Molecular Formula: C10H8O4S
Molecular Weight:224.23
Appearance:Grayish-white powder

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.

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