1:2 Cobalt complexes of disazo dyes

Organic compounds -- part of the class 532-570 series – Organic compounds – Azo

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534573, 534602, 534699, 534688, C09B 4524, C09B 3304, D06P 110, D06P 302

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049239732

ABSTRACT:
1:2 Cobalt complex dyes of the general formula I ##STR1## in which X.sub.1 is nitro or hydrogen, X.sub.2 is nitro, hydrogen, chlorine or methyl, Y.sub.1 is nitro or hydrogen, Y.sub.2 is nitro, hydrogen, chlorine or methyl, m and n, independently of each other, are each 1, 2 or 3, and Ka.sup.+ is a cation, and one of each pair of substituents X.sub.1 or X.sub.2 and Y.sub.1 or Y.sub.2 is nitro and the other is as defined but not nitro are especially suitable for dyeing wool or polyamide and, in particular, leather.

REFERENCES:
patent: 2117707 (1938-05-01), Daudt
patent: 2136650 (1938-11-01), Crossley et al.
patent: 2153531 (1939-04-01), Lange
patent: 2200445 (1940-05-01), Fellmer
patent: 2257165 (1941-09-01), Fellmer
patent: 4424152 (1984-01-01), Mennicke et al.

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