Chromate(2-), [3-[2-[4,5-dihydro-3-methyl-5-(oxo-κO)-1-phenyl-1H-pyrazol-4-yl]diazenyl-κN1]-4-(hydroxy-κO)-5-nitrobenzenesulfonato(3-)][2-[2-[2-(hydroxy-κO)-5-methoxyphenyl]diazenyl-κN1]-4,6-dinitrophenolato(2-)-κO]-, sodium (1:2)