72986-79-9 Chromate(2-), (5-chloro-2-(hydroxy-kappaO)-3-((1-(hydroxy-kappaO)-5-hydroxy-2-naphthalenyl)azo-kappaN1)benzenesulfonato(3-))(1-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-2-naphthalenolato(2-)-kappaO)-, dihydrogen, compd. with 2,2'-iminobis(ethanol) (1:2)