Einecs 283-852-8

tetrasodium 4,4'-bis[(1-hydroxy-4-sulphonato-2-naphthyl)azo][1,1'-biphenyl]-2,2'-disulphonate

4,4'-Bis[[1-hydroxy-4-(sodiooxy)sulfonyl-2-naphthalenyl]azo][1,1'-biphenyl]-2,2'-disulfonic acid disodium salt