Benzthiazolium azo dyes

Abstract

Novel cationic azo compounds of the formula ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.4 -alkylene, R.sub.2 is C.sub.1 -C.sub.4 -alkyl, R.sub.3 is C.sub.1 -C.sub.4 -alkyl, R.sub.4 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, acylamino or halogen, R.sub.5 is hydrogen, C.sub.1 -C.sub.4 - alkyl, C.sub.1 -C.sub.4 -alkoxy or halogen, one or more or R.sub.5 independently of each other being present on the ring to which R.sub.5 is attached, and A is an anion. Also provided is the production, and the use of these novel compounds as dyes for dyeing and/or printing, especially polyacrylonitrile materials, neutral blue dyeings having in particular good fastness to light being obtained.

Dependencies are inferred from the claim text.