abstract |
The present invention relates to the agents for dyeing keratin fibers comprising at least one zwitterionic azometin dye of the general formula (I), (II) or (III) (see formulas) in which z is a heterocycle of the formula (IV), (V), (VI), (VII), (VIII), (IX), (X), (XI), (XII) (see formulas) in which R8 is an alkyl alkyl sulfonate of the formula (XIII); (see formula (XIII)). |