2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-((2-methoxyphenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((6-sulfo-2-naphthalenyl)azo)-, tetrasodium salt 65186-16-5 EINECS 265-606-1 Tetrasodium hydrogen 7-((((6-((2-methoxyphenyl)azo)-5-oxide-7-sulphonato-2-naphthyl)amino)carbonyl)amino)-4-oxide-3-((6-sulphonato-2-naphthyl)azo)naphthalene-2-sulphonate