The present disclosure relates to novel secondary para-phenylenediamines having a carboxyl group. The present disclosure further relates to a dye composition comprising at least one secondary para-phenylenediamine for dyeing keratin fibers, such as human hair, a process for preparing the composition, and a process and kit for dyeing keratin fibers using the composition.
                            本公开涉及具有羧基的新型次
对苯二胺。本公开进一步涉及一种
染料组合物,包括至少一种次
对苯二胺,用于染色角蛋白纤维,如人类头发,以及用于制备该组合物的过程,以及使用该组合物染色角蛋白纤维的过程和工具包。