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Azomethine Dyes

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Azomethine Dyes 

organic dyes whose molecules contain the characteristic chromophore groups—CH=N—. The azomethine dyes include one of the first synthetic dyes, purple-red murexide. Its formation serves as a characteristic reaction for uric acid, which forms this dye during evaporation with diluted HNO3 and the subsequent addition of ammonia.



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