Novel double para-phenylenediamines joined by a linker arm substituted with one or more carboxylic radicals and/or derivatives and use in dyeing

摘要

The present application relates to a novel family of double para-phenylenediamines joined by a linker arm substituted with one or more carboxylic radicals and/or derivatives and to the use thereof for the dyeing of keratin fibres. These novel para-phenylenediamines are useful as oxidation bases for the dyeing of keratin fibres.