Fiber-reactive, water-soluble disazo dyes containing an N-B-sulfoethylamide group

Claim 1

A water-soluble disazo-dyestuff which corresponds in the form of the free acid to the formula ##SPC11## wherein A is phenylene, naphthylene or phenylene or naphthylene substituted by alkyl of from 1 to 4 carbon atoms, alkoxy of from 1 to 4 carbon atoms, chlorine, acetylamino, benzoylamino or trifluoromethyl, B is phenolyl or phenolyl substituted by chlorine, alkyl of from 1 to 4 carbon atoms or alkoxy of 1 - 4 carbon atoms, or anilino or anilino substituted by chlorine, alkyl of 1 - 4 carbon atoms, alkoxy of from 1 to 4 carbon atoms or acetylamino, or anilino substituted at the N-atom by lower alkyl, β-hydroxyethyl, β-cyanoethyl, β-acetoxyethyl wherein the nucleus is unsubstituted or substituted by lower alkyl, lower alkoxy or chlorine, or α-naphtholyl, β-naphtholyl or α-naphtholyl or β-naphtholyl substituted by --SO 2 -NH 2 , lower alkyl sulfonamide acetylamino, benzoyl-amino or phenyl-amino wherein the phenyl nucleus is unsubstituted or substituted by lower alkyl, lower alkoxy or chlorine, or 2,3 naphthoic acid anilido substituted in the anilido radical by chlorine, lower alkyl, lower alkoxy or cyano, or acetoacetylanilido or acetoacetylanilido substituted in the anilido portion by lower alkyl, lower alkoxy or chlorine, and R is hydrogen or lower alkyl.