| CAS No.: | 84-87-7 |
|---|---|
| Formula: | C10h8o4s |
| EINECS: | 201-568-4 |
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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
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 | 170ºC |
| 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 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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