| 摘要 |
Fibre-reactive formazan compounds, salts thereof or free acid forms thereof according to formula (I), each of R2 and R4 is independently hydrogen, -COOH, -SO3H, -NHCOCH3, -NHCOCHY2-CH2Y1, -NHCOCY2=CH2 or -NHCOCH2Y1, R3 is hydrogen, halogen, C1-4alkyl, C1-4alkoxy, -COOH or -SO3H, Y1 is chlorine, bromine, -OSO3H or -SSO3H, Y2 is hydrogen, chlorine or bromine, and Z is <IMAGE> The compounds are particularly useful in dyeing or printing hydroxy-group containing or nitrogen-containing organic substrates, including leather, fiber materials, and textiles.
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