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Home › Trialkoxy-substituted meta-phenylenediamines, a process for their preparation, and their use as couplers for the oxidation dyeing of keratinous fibres and in particular of human hair

Trialkoxy-substituted meta-phenylenediamines, a process for their preparation, and their use as couplers for the oxidation dyeing of keratinous fibres and in particular of human hair

US Patent 5002585 · Granted Mar 26, 1991

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