54227-68-8 Copper, (4-(4,5-dihydro-4-((2-hydroxy-5-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonato(2-))-, disodium salt Disodium (4-(4,5-dihydro-4-((2-hydroxy-5-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonato(4-))cuprate(2-) EINECS 259-032-0