2H-Naphtho(1,2-d)triazole-6,8-disulfonic acid, 2-(4-(2-(4-((3-amino-2-methoxy-5-methylphenyl)azo)-2-sulfophenyl)ethenyl)-3-sulfophenyl)-, tetrasodium salt 67875-23-4 EINECS 267-538-8 Tetrasodium 2-(4-(2-(4-((3-amino-2-methoxy-5-methylphenyl)azo)-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)-2H-naphtho(1,2-d)triazole-6,8-disulphonate