| abstract |
The present invention relates to dyes of the general formula I, wherein X and Y are hydrogen, bromine or chlorine, but not simultaneously hydrogen; R is F, Cl, Br, COOR 1 or CF 3 ; R 'for H or F; R 1 is C 1 -C 6 -alkyl and one of W 1 and W 2 is hydroxy and the other is nitro and Y is always ortho to the hydroxy group; wherein compounds in which R is Cl which is bonded to the phenyl nucleus ortho to the NH group and compounds wherein W 1 is nitro, W 2 is hydroxy, Y is hydrogen, X is chlorine and R is Bromine, which is bound to the phenyl nucleus in the meta position to the NH group, are excluded, containing these mixtures with other dyes and their preparation and use. |