16452-06-5 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((4-methoxy-2-sulfophenyl)azo)- 7-Amino-4-hydroxy-3-((4-methoxy-2-sulfophenyl)azo)-2-naphthalenesulfonic acid 7-Amino-4-hydroxy-3-((4-methoxy-2-sulphophenyl)azo)naphthalene-2-sulphonic acid EINECS 240-502-9