The present invention relates to disperse azo dyes of formula ##STR00001##
wherein R.sub.1 is bromo, nitro, cyano, methyl, methoxy or trifluoromethyl; R.sub.2 is hydrogen, chloro, bromo or trifluoromethyl; R.sub.3 is hydrogen, chloro, bromo, methoxy, trifluoromethyl, nitro or cyano; and R.sub.4 is methyl, ethyl, n-propyl, 2-methoxyethyl, methoxycarbonylmethyl or 2-methoxycarbonylethyl;
with the proviso that R.sub.1 is cyano in case R.sub.2 denotes chloro or bromo,
to a process for the preparation of such dyes and to their use in the dyeing or printing of semi-synthetic and, especially, synthetic hydrophobic fibre materials, more especially textile materials.

The present invention relates to disperse azo dyes of formula

##STR00001##

wherein

R.sub.1 is bromo, nitro, cyano, methyl, methoxy or trifluoromethyl;

R.sub.2 is hydrogen, chloro, bromo or trifluoromethyl;

R.sub.3 is hydrogen, chloro, bromo, methoxy, trifluoromethyl, nitro or cyano; and

R.sub.4 is methyl, ethyl, n-propyl, 2-methoxyethyl, methoxycarbonylmethyl or 2-methoxycarbonylethyl;

with the proviso that R.sub.1 is cyano in case R.sub.2 denotes chloro or bromo,

to a process for the preparation of such dyes and to their use in the dyeing or printing of semi-synthetic and, especially, synthetic hydrophobic fibre materials, more especially textile materials.