Nouvelles 2-nitro p-phénylènediamines hydroxyéthylées et leur utilisation en teinture des fibres kératiniques.

摘要

A N<1>,N<4>-dihydroxyethylated 2-nitro-p-phenylenediamine of formula (I), wherein R is C3-4 alkyl, and cosmetically acceptable salts thereof, for use in direct dyeing to give blue through purple shades which are wash-fast, light-fast, weatherproof and sweat resistant, and optionally combined with yellow and optionally red or orange-coloured dyes to give natural hues.