1,4-Benzenedisulfonic acid, 2-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-1-naphthalenyl)azo)-6-sulfo-1-naphthalenyl)azo)-, tetrasodium salt 2503-73-3 47909-69-3 C.I. DIRECT BLUE 78, TETRASODIUM SALT EINECS 219-708-8 Ismafast Blue 4GL Tetrasodium 2-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl)azo)-1-naphthyl)azo)-6-sulphonato-1-naphthyl)azo)benzene-1,4-disulphonate