71243-97-5 Cobaltate(2-), (1-((5-chloro-2-(hydroxy-kappaO)phenyl)azo-kappaN1)-2-naphthalenolato(2-)-kappaO)(3-(hydroxy-kappaO)-4-((2-(hydroxy-kappaO)-1-naphthalenyl)azo-kappaN1)-7-nitro-1-naphthalenesulfonato(3-))-, sodium hydrogen EINECS 275-297-5 Hydrogen sodium (1-((5-chloro-2-hydroxyphenyl)azo)naphthalen-2-olato(2-))(3-hydroxy-4-((2-hydroxy-1-naphthyl)azo)-7-nitronaphthalene-1-sulphonato(3-))cobaltate(2-)