| 摘要 |
Asymmetric 1:2-chrome complex dyes of the formula: <IMAGE> wherein A is the radical of 1-hydroxynaphthalene or 2-hydroxynaphthalene, R1 is hydrogen, chlorine or methyl, R2 is hydrogen, nitro or chlorine, and Ka+ is a cation, and of the substituents X1, X2 and X3 one is an SO3 group, and the other two are hydrogen, X3 being hydrogen when R1 is chlorine and R2 is hydrogen, give blue shades on leather and other polyamides, which shades are lightfast and fast to wet processing.
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