16596-97-7 2H-Naphtho(1,2-d)triazole-5-sulfonic acid, 2-(4-(2-(4-((2-methyl-4-(7-sulfo-2H-naphtho(1,2-d)triazol-2-yl)phenyl)azo)-2-sulfophenyl)ethenyl)-3-sulfophenyl)-, tetrasodium salt EINECS 240-655-1 Tetrasodium 2-(4-(2-(4-((2-methyl-4-(7-sulphonato-2H-naphtho(1,2-d)triazol-2-yl)phenyl)azo)-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)-2H-naphtho(1,2-d)triazole-5-sulphonate