- Hydroxyethylated 2-nitro-p-phenylenediamines and use thereof for dyeing keratin fibers
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A N1,N4-dihydroxyethylated 2-nitro-p-phenylenediamine of formula (I), wherein R is C3-4 aklyl, 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 r
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