The invention provides dyeing compositions for keratin fibres, which contain at least one dyestuff corresponding to the formula: ##STR1## in which R.sub.1 and R.sub.2 independently of one another denote a hydrogen atom, an alkyl group, a monohydroxyalkyl or polyhydroxyalkyl group, an alkyl group substituted by an alkoxy group, or an aminoalkyl group of which the amino group can optionally be monosubstituted or disubstituted by an alkyl group, and the radical R.sub.2 can also denote a phenyl group or a phenyl group substituted by an alkyl, hydroxyl or amino group, and Z denotes a hydrogen atom or an alkyl group, or their cosmetically acceptable salts. Many of the dyestuffs are novel.
该发明提供了用于角蛋白纤维的
染料组合物,其含有至少一种符合以下式的
染料:##STR1## 在该式中,R.sub.1和R.sub.2分别表示氢原子、烷基、单羟基烷基或多羟基烷基、被烷氧基取代的烷基、或者其
氨基可以选择性地被烷基单取代或双取代的
氨基烷基,而基团R.sub.2也可以表示苯基或被烷基、羟基或
氨基取代的苯基,Z表示氢原子或烷基,或者它们的化妆品可接受的盐。许多
染料是新颖的。