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Acid dyes - Characteristic

Acid groups in acid dyes are mainly sulfonic acid group (-so3h), and exist on dye molecules in the form of sodium sulfonate (-so3na). Some dyes also take carboxylate sodium salt (-coona) as acid groups.

It is characterized by good water-solubility, bright color, complete chromatography, relatively simple molecular structure compared with other dyes, the lack of long conjugated coherent system in dye molecules, dyes are less direct.


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