12217-51-5 2-(((1,3-Dihydro-1,3-dimethyl-2H-benzimidazol-2-ylidene)methyl)azo)-3-methylbenzothiazolium methyl sulphate 52435-14-0 68893-88-9 Benzothiazolium, 2-(((1,3-dihydro-1,3-dimethyl-2H-benzimidazol-2-ylidene)methyl)azo)-3-methyl-, methyl sulfate EINECS 257-917-6