1,4-Benzenedisulfonic acid, 2-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-7-sulfo-1-naphthalenyl)azo)-1-naphthalenyl)azo)-, tetrasodium salt 6428-58-6 EINECS 229-210-2 Tetrasodium 2-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl)azo)-7-sulphonato-1-naphthyl)azo)-1-naphthyl)azo)benzene-1,4-disulphonate