Water-soluble acid azo dye

Details Water-soluble acid azo dye Water-soluble acid azo dye

1978-03-15

1980-02-05

Doll, John

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260175, 260207, 2602071, C09B 2936, C09B 2906

Patent

active

041872185

ABSTRACT:
This invention relates to a class of water-soluble acid azo dyes, containing at least a sulphonic group, having formula (I): ##STR1## wherein the symbols have the following meanings: A is a residue of a diazotizable aromatic or heterocyclic amine, optionally substituted;

REFERENCES:
patent: 1342134 (1920-06-01), Schedler
patent: 1483447 (1924-02-01), Huismann
patent: 2760959 (1956-08-01), Bossard et al.
patent: 2768159 (1956-10-01), Bossard et al.
patent: 3419542 (1968-12-01), Meininger et al.
patent: 3525733 (1970-08-01), Weaver et al.
patent: 3637653 (1972-01-01), Brachel et al.
patent: 4087420 (1978-05-01), Heinrich et al.

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