Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups

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Complex metal compounds of azo dyes > Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups

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• C09B 45/025
• C09B 45/04 Azo compounds in general
• C09B 45/14 Monoazo compounds
• C09B 45/24 Disazo or polyazo compounds