Dyestuff of the formula ##SPC16##
- in which
- R is C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -haloalkenyl, ethylene bonded to the .beta.-position of the naphthalene ring, or C.sub.1 -C.sub.6 -alkyl substituted by halogen, C.sub.1 -C.sub.4 -alkoxy, cyano, C.sub.1 -C.sub.4 -alkoxycarbonyl, or carbonamide;
- R.sub.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -
- .sub.6 -alkenyl, C.sub.3 -C.sub.6 -haloalkenyl, alkylene selected from the group consisting of --CH.sub.2 --CH.sub.2 --(CH.sub.2).sub.3 --, --CH.sub.2 --CH(CH.sub.3)--CH(CH.sub.3)--, and --CH.sub.2 --CH.sub. 2 --CH(CH.sub.3)-- bonded to ring B in the 0-position or C.sub.1 -C.sub.6 -alkyl substituted by halogen, C.sub.1 -C.sub.4 -alkoxy, cyano, C.sub.1 -C.sub.4 -alkoxycarbonyl, or carbonamide;
- R.sub.2 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkyl substituted by halogen or C.sub.1 -C.sub.4 -alkoxy, C.sub. 3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -haloalkenyl, cyclopentyl, cyclohexyl, halocyclopentyl, halocyclohexyl, C.sub.1 -C.sub.4 -alkylcyclopentyl, C.sub.1 -C.sub.4 -alkylcyclohexyl, phenyl, halophenyl, C.sub.1 -C.sub.4 -alkylphenyl, C.sub.1 -C.sub.4 -alkoxyphenyl, nitrophenyl, cyanophenyl, pyridinyl pyrimidinyl, triazinyl, triazolyl, thiazolyl, imidazolyl, tetrazolyl, benzyl, 2-phenylethyl, 2-phenylpropyl-(2) or any of said benzyl, 2-phenylethyl, or 2-phenylpropyl-(2) substituted in the phenyl nucleus by halogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkoxy;
- R.sub.3 is C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkyl substituted by halogen, C.sub.1 -C.sub.4 -alkoxy, cyano, C.sub.1 -C.sub.4 -alkoxycarbonyl, or carbonamide, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -haloalkenyl, cyclopentyl, cyclohexyl, halocyclopentyl, halocyclohexyl, C.sub.1 -C.sub.4 -alkylcyclopentyl, C.sub.1 -C.sub.4 -alkylcyclohexyl, phenyl, halophenyl, C.sub.1 -C.sub.4 -alkylphenyl, C.sub.1 -C.sub.4 -alkoxyphenyl, nitrophenyl, cyanophenyl, pyridinyl, pyrimidinyl, triazinyl, triazolyl, thiazolyl, imidazolyl, tetrazolyl, di-C.sub.1 -C.sub.4 -alkylamino, morpholino, piperidino, piperazino, benzyl, 2-phenylethyl, 2-phenylpropyl-(2) or any of said benzyl, 2-phenylethyl, or 2-phenylpropyl-(2) substituted in the phenyl nucleus by halogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkoxy;
- R.sub.2 and R.sub.3, additionally maY be joined together to form a cyclic sulphonamido;
- A is C.sub.2 -C.sub.4 -alkylene;
- An .sup.(.sup.-) is an anion;
- Ring B may be fused to another benzene ring;
- and the cyclic and acyclic radicals in the above formula may be further substituted by C.sub.1 -C.sub.4 -alkoxy, .beta.-methoxyethoxy, .beta.-cyanoethoxy, allyloxy, halogen, amino, C.sub.1 -C.sub.4 -alkylamino, benzylamino, acetylamino, methylsulphonylamino, phenylsulphonylamino, dimethylamino, phenylamino, methylsulphonyl, phenylsulphonyl, methoxycarbonyl, ethoxycarbonyl, carbamoyl, or cyano, and the cyclic radicals may additionally be substituted by C.sub.1 -C.sub.4 -alkyl.