2-Naphthalenesulfonic acid, 5-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-8-((6-sulfo-4-((3-sulfophenyl)azo)-1-naphthalenyl)azo)-, tetrasodium salt 6428-60-0 EINECS 229-211-8 Tetrasodium 5-((1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl)azo)-8-((6-sulphonato-4-((3-sulphonatophenyl)azo)naphthyl)azo)naphthalene-2-sulphonate