| 摘要 |
1,3-disubstituted nitrobenzoles of the general formula (I) in which X is a hydroxyl group or an amino group and R<1> is hydrogen or an alkyl group with 1 - 4 C atoms and their salts are suitable for use as an oxidation pigment pre-product of the coupler type together with prior art developer components for the production of oxidation pigments, preferably for the production of hair colorants. With developers of the p-phenylene diamine, p-aminophenols, 2,5-diaminopyridine and 2,4,5,6-tetraaminopyrimidine type, primarily brown hues with great light stability are formed. |
