71735-65-4 EINECS 275-964-0 Tetrasodium (8-hydroxy-7-((2-hydroxy-7-sulpho-6-((4-((2,5,6-trichloro-4-pyrimidinyl)amino)phenyl)azo)-1-naphthyl)azo)naphthalene-1,3,6-trisulphonato(6-))cuprate(4-)