Patent ID: 7122061

Claim:
A colorant for oxidative dyeing of keretin fibers, particularly human hair, based on a developer-coupler combination, said colorant containing at least one 4-aminobiphenyl-3-ol derivative of general formula (I) or a physiologically compatible, water-soluble salt thereof, wherein R1 and R2 independently of each other denote hydrogen, a halogen atom, a cyano group, a hydroxyl group, C 1 –C 4 -alkoxy group, a C z –C 4 -hydroxyalkoxy group, a C 1 –C 6 -alkyl group, a nitro group, a trifluoromethyl group, a —C(O)H group, a —C(O)CH 3 group, a —C(O)CF 3 group, an —Si(CH 3 ) 3 group, a C 1 –C 6 -hydroxyalkyl group, or R1 and R2 together form an —O—CH 2 —O— bridge.