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.
                            本申请涉及一种新型的双
对苯二胺家族,其通过连接一个或多个羧基和/或衍
生物取代的连接臂相连,并且用于染色角蛋白纤维。这些新型
对苯二胺可用作染色角蛋白纤维的氧化碱。