(1,1'-Biphenyl)-2,2'-disulfonic acid, 4-((4-((chloroacetyl)amino)phenyl)azo)-4'-((1-hydroxy-4-sulfo-2-naphthalenyl)azo)-5,5'-dimethyl-, trisodium salt 71720-94-0 EINECS 275-920-0 Trisodium 4-((4-((chloroacetyl)amino)phenyl)azo)-4'-((1-hydroxy-4-sulphonato-2-naphthyl)azo)-5,5'-dimethyl(1,1'-biphenyl)-2,2'-disulphonate