Sulfur-containing nitroamino-benzene dyes, process and hair dye compositions.

摘要

Sulfur containing nitroamino benzene dyes of formula: <CHEM> and salts thereof wherein (a) R1 and R2 are the same or different and are selected from the group consisting of alkyl, hydroxyalkyl, polyhydroxyalky, aminoalkyl, monoalklylaminoalkyl and dialkylaminoalkyl, wherein (b) n is 0, 1 or 2, and wherein (c) The group <CHEM> occupies a position that is meta or para to the group - NHR1; a process for synthesizing these compounds and their use as direct dyeing hair dyes also being disclosed. d