| 摘要 |
Dicationic azo dyes of the formula (I), which are suitable for coloring keratin fibers, in particular human hair, and are in part themselves still not described in the prior art are provided. In colorations, particularly brilliant and luminous red shades are obtained. Agents for dyeing and optionally simultaneously lightening keratin fibers and methods for dyeing and optionally simultaneously lightening keratinic fibers also are provided.
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