6-Methoxy-3-methyl-2-(3-methyl-3-(4-nitrophenyl)triazen-1-yl)benzothiazolium methyl sulphate 89923-57-9 Benzothiazolium, 6-methoxy-3-methyl-2-(3-methyl-3-(4-nitrophenyl)-1-triazenyl)-, methyl sulfate EINECS 289-547-6