tetrasodium 5,5'-[carbonylbis[imino(1-hydroxy-3-sulphonatonaphthalene-2,6-diyl)azo]]bisnaphthalene-1-sulphonate C.I.DIRECTRED54 5,5'-[Carbonylbis[imino(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo]]bis[1-naphthalenesulfonic acid]tetrasodium salt C.I.29215 Direct Fast Scarlet 8BA 1-Naphthalenesulfonic acid, 5,5'-(carbonylbis(imino(1-hydroxy-3-sulfo-6,2-naphthalenediyl)-2,1-diazenediyl))bis-, sodium salt (1:4) 1-Naphthalenesulfonic acid, 5,5'-(carbonylbis(imino(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo))bis-, tetrasodium salt Einecs 229-108-8