Asymmetrical 1:2 chromium complex dyes

Die neuen asymmetrischen 1:2-Chromkomplexfarbstoffe der im Anspruch 1 aufgeführten Formel I eignen sich insbesondere zum Färben von Leder. 1. A 1 : 2 chromium complex dye of the formula I see diagramm : EP0148120,P18,F1 wherein A is the radical of a diazo component of the benzene or naphthalene series, which carries the hydroxyl or carboxyl group in the o-position with respect to the azo group, B is the radical of a coupling component which carries the group X in the position adjacent to the azo group, X is oxygen, or a radical of the formula -NR-, in which R is hydrogen or C1 -C4 alkyl, Z is hydrogen, or a group -N=N-Ar, in which Ar is an unsubstituted or substituted aryl radical which carries at most one sulfo group, m is 0 or 1, n is 4, 5, 6 or 7, and Ka(anion) is a cation, where the ring D can carry further substituents.