2-Naphthalenesulfonic acid, 3-((4-amino-2-methoxyphenyl)azo)-4-hydroxy-6-((3-sulfophenyl)amino)-, sodium salt 3-((4-Amino-2-methoxyphenyl)azo)-4-hydroxy-6-((3-sulfophenyl)amino)-2-naphthalenesulfonic acid, sodium salt 3-((4-Amino-2-methoxyphenyl)azo)-4-hydroxy-6-((3-sulphophenyl)amino)naphthalene-2-sulphonic acid, sodium salt 75627-18-8 EINECS 278-273-2