| abstract |
Disazo dyestuffs containing sulfo groups and having fiber-reactive properties, which are capable of dyeing materials containing hydroxyl groups and/or carboxamide groups, in particular fiber materials, such as synthetic polyamide fibers, wool and in particular cellulose fiber materials, in deep fast shades. They contain a group corresponding to the formula ##STR1## in which R.sup.α is hydrogen or alkyl having 1 to 4 carbon atoms, which can be substituted by carboxyl, sulfo, cyano, hydroxyl or chlorine; n B is fluorine, chlorine, bromine, lower alkylsulfonyl, phenylsulfonyl, methoxy or sulfo; n Q is a group of the formula ##STR2## in which Y is vinyl, β-sulfatoethyl, β-halogenoethyl, β-thiosulfatoethyl, β-phosphatoethyl or β-acetoxyethyl, n R is hydrogen or lower alkyl, n k is the number zero to 4 and n X, together with the N atom, forms the bivalent radical of a heterocyclic ring which optionally contains additional hetero atoms. |