73003-22-2 Chromate(2-), (5-((5-chloro-2-(hydroxy-kappaO)phenyl)azo-kappaN1)-4-hydroxy-6-(hydroxy-kappaO)-2-naphthalenesulfonato(3-))(1-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-2-naphthalenolato(2-)-kappaO)-, dihydrogen, compd. with 2,2'-iminobis(ethanol) (1:2)