2-(4-(2-(4-Amino-2-sulphophenyl)vinyl)-3-sulphophenyl)-2H-naphtho(1,2-d)triazole-5-sulphonic acid 2H-Naphtho(1,2-d)triazole-5-sulfonic acid, 2-(4-(2-(4-amino-2-sulfophenyl)ethenyl)-3-sulfophenyl)- 63216-86-4 EINECS 264-004-6