Compounds of the formula ##STR1## in which R.sub.1 is hydrogen or an aliphatic or aromatic substituent conventional for diazo component radicals of disperse dyes and which is bound to a N-atom in the 1- or 2-position of the triazole nucleus through a carbon atom, with the proviso that when R.sub.1 is in the 1-position, the broken line represents double bonds in the 2,3- and 4,5-positions and when R.sub.1 is in the 2-position, the broken line represents double bonds in the 3,4- and 1,5-positions,R.sub.2 is an electron withdrawing or inductive group, andK is a coupling component radical of the aniline series,with the proviso that the molecule is free from cationic groups, sulphonic acid groups, metals and metallizable groups, which compounds are useful as disperse dyes for textile substrates consisting of or comprising synthetic or semi-synthetic, hydrophobic, high molecular weight organic materials such as linear aromatic polyesters, cellulose 21/2 acetate, cellulose triacetate and synthetic polyamides.