abstract |
The invention relates to compounds of the general formula I <IMAGE> I wherein R1 and R2 independently of one another each represent a hydrogen atom, a (C1-C2) alkyl group, a hydroxy (C2-C3) alkyl group or a 2,3-dihydroxypropyl group and X is a florine atom or a trifluoromethyl group, processes for their preparation and aqueous hair coloring agents containing these compounds. |