Azo dyestuffs

Details Azo dyestuffs Azo dyestuffs

C - Chemistry, Metallurgy

09

B

8/21.4, 260/166.

C09B 45/16 (2006.01) D06P 1/10 (2006.01)

Patent

CA 1070297

Abstract of the Disclosure The present invention relates to asymmetric 1:2 chromium complexes of formula I, Image I in which A is a group of formula (a) or (b) Image or Image (a) (b) in which X is halogen, nitro or methyl, Y is hydrogen or nitro, * designates the carbon atom bound to the azo group, Z is halogen or nitro, both substituents being the same, each of R1 and R2, independently is unsubstituted phenyl or phenyl substituted by a total of up to three substituents selected from halogen, (C1-6) alkyl, (C1-6) alkoxy, nitro and cyano (maximum of two nitro and/or cyano), and M is hydrogen or an equivalent of a non- chromophoric cation, with the proviso that the sulpho group is in salt form, and mixtures of two or more of such 1:2 asymmetric complexes, which complexes and mixtures are useful for dyeing nitrogen- containing organic substrates.

259829

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