72496-87-8 EINECS 276-700-7 Ferrate(1-), bis(3-(4,5-dihydro-4-((2-(hydroxy-kappaO)-5-nitrophenyl)azo-kappaN1)-3-methyl-5-(oxo-kappaO)-1H-pyrazol-1-yl)benzenesulfonamidato(2-))-, sodium Sodium bis(3-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzene-1-sulphonamidato(2-))ferrate(1-)