| abstract |
Sulfur containing nitroamino benzene dyes of formula: n nand salts thereof wherein n (a) R₁ and R₂ are the same or different and are selected nfrom the group consisting of alkyl, hydroxyalkyl, npolyhydroxyalky, aminoalkyl, monoalklylaminoalkyl and ndialkylaminoalkyl, n nwherein (b) n is 0, 1 or 2, and wherein (c) The group n noccupies a position that is meta or npara to the group - NHR₁; a process for synthesizing these ncompounds and their use as direct dyeing hair dyes also being ndisclosed. |