4-Methyl-2,6-dihydroxy-3-cyanopyridine containing dyestuffs
AssigneeCiba-Geigy Corporation
InventorsArthur Buehler, Alfred Fasciati, Gerd Hoelzie
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Abstract
Water-soluble copper-, chromium-, cobalt- or nickel- complexes of dyestuffs containing at least one sulfo group and a group of the formula ##SPC1## Are disclosed. These dyequffs are useful in dyeing man-made fibers, especially wool, and are fast to light and wet treatments.
Claims5
A water-soluble copper-, chromium-, cobalt-, or nickel- complex of a dyestuff of the formula ##EQU5## wherein D is benzene or naphthalene which is a. substituted in the ortho position to the azo group by carboxy, hydroxy, or methoxy, and
- b. substituted by at least one sulphonic acid group and
- c. is further unsubstituted or substituted by hydroxy, methoxy, acetylamino, chloro, nitro, cyano, benzoylamino, carboxy, 3-sulphophenylazo, amino, methyl, 4,8-disulphonapthylazo or 4-methyl-3-sulphobenzenesulphonyl.
The 1:2-cobalt complex compound as claimed in claim 4 of the azo dyestuff of the formula ##SPC22##
Dependencies are inferred from the claim text.