73507-24-1 Cuprate(4-), (:3-(7-((6-((4'-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-3,3'-dihydroxy(1,1'-biphenyl)-4-yl)azo)-1,5-dihydroxy-7-sulfo-2-naphthalenyl)azo)-8-hydroxy-1,3,6-naphthalenetrisulfonato(10-)))tri-, tetrasodium EINECS 277-498-3