1,2-Dimethyl-beta-naphthothiazolium p-tosylate 1,2-Dimethylnaphtho(1,2-d)thiazolium toluene-p-sulphonate 58480-17-4 EINECS 261-283-6 Naphtho(1,2-d)thiazolium, 1,2-dimethyl-, salt with 4-methylbenzenesulfonic acid (1:1)