2-(Benzothiazol-2-yl)-5-styryl-3-(1,2,3,4-tetrahydro-1,4-dioxophthalazin-6-yl)-2H-tetrazolium chloride 2H-Tetrazolium, 2-(2-benzothiazolyl)-5-(2-phenylethenyl)-3-(1,2,3,4-tetrahydro-1,4-dioxo-6-phthalazinyl)-, chloride 38116-89-1 Bspt salt EINECS 253-785-9