Piperazinyl-triazinylnaphtholsulphonic acid azo dyes

Abstract

Water-soluble triazine compounds which, in their betaine form correspond to the formula ##STR1## wherein R.sub.1 denotes hydrogen or alkyl, R.sub.2 and R.sub.3 independently of one another denote hydrogen, alkyl, alkenyl or aralkyl, X denotes halogen, hydroxyl, alkoxy, alkyl, aryl or an optionally monosubstituted or disubstituted amino group, the substituents of which can be involved--optionally via a hetero-atom--in cyclization, and Y denotes hydrogen or the radical of an azo dyestuff, and wherein the cyclic and acyclic radicals can carry further substituents, are used--when Y represents the radical of an azo dyestuff--for dyeing synthetic and natural materials, in particular paper, and--when Y represents hydrogen--for the preparation of azo dyestuffs.

Dependencies are inferred from the claim text.