2-Naphthalenesulfonic acid, 5-((6-((3-aminobenzoyl)amino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-6-ethoxy-8-((7-sulfo-4-((3-sulfophenyl)azo)-1-naphthalenyl)azo)-, tetrasodium salt 6428-19-9 EINECS 229-205-5 Tetrasodium 5-((6-((3-aminobenzoyl)amino)-1-hydroxy-3-sulphonato-2-naphthyl)azo)-6-ethoxy-8-((7-sulphonato-4-((3-sulphonatophenyl)azo)naphthyl)azo)naphthalene-2-sulphonate