Poly(oxy-1,2-ethanediyl), α-[2-[3,6-bis(diethylamino)xanthylium-9-yl]benzoyl]-ω-hydroxy-, [2,4-dihydro-4-[2-[2-(hydroxy-κO)-5-nitrophenyl]diazenyl-κN1]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)-κO3][2-[2-[4,5-dihydro-3-methyl-5-(oxo-κO)-1-phenyl-1H-pyrazol-4-yl]diazenyl-κN1]benzoato(2-)-κO]chromate(1-) (1:1)