| abstract |
in which n = 0 or 1 and R 1 = hydrogen, an alkyl or hydroxyalkyl group having 1 to 4 carbon atoms or an amino group, or their salts are suitable as couplers for oxidation hair colorants based on customary developer components. They testify z. B. with 2,4,5,6-tetraaminopyrimidine red to brown and with p-toluenediamine red to blue-violet hair coloring. |