2,7-Naphthalenedisulfonic acid, 5-(benzoylamino)-3-((4-((4-(benzoylamino)-2-sulfophenyl)azo)-2-ethoxy-6-sulfo-1-naphthalenyl)azo)-4-hydroxy-, tetrasodium salt 6-Ethoxy-5-((5-benzoylamino-2,7-disulfo-4-hydroxy-3-naphthyl)azo)-8-((4-(benzoylamino)-2-sulfophenyl)azo)-2-naphthalenesulfonic acid, tetrasodium salt 72749-84-9 EINECS 276-819-4 Tetrasodium 5-(benzoylamino)-3-((4-((4-(benzoylamino)-2-sulphonatophenyl)azo)-2-ethoxy-6-sulphonato-1-naphthyl)azo)-4-hydroxynaphthalene-2,7-disulphonate