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ChemicalBook CAS DataBase List 2-Amino-4-chlorophenol-6-sulfonic acid
88-23-3

2-Amino-4-chlorophenol-6-sulfonic acid synthesis

3synthesis methods
2-Amino-4-chlorophenol-6-sulfonic acid obtained from p-chlorophenol by sulfonation and nitration is reduced with iron and hydrochloric acid without being precipitated. After filtering from the iron sludge, the highly alkaline reduction liquor is concentrated by evaporation and decolorized with activated carbon. Upon acidification 3-amino-5-chloro-2-hydroxybenzenesulfonic acid precipitates. Yield 72 %, based on p-chlorophenol.
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Yield:-

Reaction Conditions:

with sulfuric acid

References:

I. G. Farbenindustrie [Privatmitteilung]

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