6859-12-7 EINECS 229-956-9 Tetrasodium 5-((4-(((4-((4-((8-(acetylamino)-1-hydroxy-3,6-disulphonato-2-naphthyl)azo)-3-ethoxy-7-sulphonato-1-naphthyl)azo)phenyl)amino)carbonyl)phenyl)azo)salicylate