2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((3-methyl-4-((4-sulfophenyl)azo)phenyl)azo)- 36867-70-6 7-Amino-4-hydroxy-3-((3-methyl-4-((4-sulphophenyl)azo)phenyl)azo)naphthalene-2-sulphonic acid EINECS 253-244-7