Abstract: 4-(Pyrazol-4-ylimino)-2,5-cyclohexadienylidene-ammonium salts of the general formula(I) and colorants comprising these compounds for keratin fibres.

Abstract: 4-(Pyrazol-4-ylimino)-2,5-cyclohexadienylidene-ammonium salts of the general formula (I) and colorants comprising these compounds for keratin fibres.

Abstract: New p-diaminobenzene derivative compounds of formula (I), or their physiologically compatible salts, are disclosed: Compositions for oxidatively dyeing keratin fibers, especially human hair, that contain the p-diaminobenzene derivative compounds of formula (I), as well as a suitable coupler substance, are also disclosed.

Abstract: The dye composition for fibers, especially keratin-containing fibers, contains at least one indane derivative compound of formula I, or a physiologically compatible, water-soluble salt thereof: wherein R1 is hydrogen, a halogen atom, a cyano group, a hydroxy group, a C1— to C4— alkoxy group, a C1— to C6— alkyl group, a nitro group, an amino group, an alkylamino group, a dialkylamino group, a —C(O)H group, a —COOR3 group, a —SO2R3 or a —C(O)CH3 group, wherein R3 is hydrogen, phenyl or a C1— to C6— alkyl group; and R2 is hydrogen, a C1— to C6— alkyl group or a phenyl group.