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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

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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:Naphthol-4-sulfonic acid Structure

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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