2-Naphthalenesulfonic acid, 8-((4-((4-amino-3-sulfophenyl)azo)-6-sulfo-1-naphthalenyl)azo)-5-((6-(benzoylamino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-, tetrasodium salt 70210-31-0 EINECS 274-427-8 Tetrasodium 8-((4-((4-amino-3-sulphonatophenyl)azo)-6-sulphonatonaphthyl)azo)-5-((6-(benzoylamino)-1-hydroxy-3-sulphonato-2-naphthyl)azo)naphthalene-2-sulphonate