New dimethylated, their process of preparation and their use in dyeing the subject-matter

摘要

The invention relates to dimethylated derivatives of nitroparaphenylenediamine of formula: IMAGE in which CH3 is in position 2 or 5 of the benzene ring, or to the cosmetically acceptable salts of these compounds, as well as the process for preparing them and their use in dyeing compositions, in particular for the hair, both for direct dyeing and for oxidative dyeing.