52277-69-7 Cobaltate(1-), bis(1-((2-(hydroxy-kappaO)-5-nitrophenyl)azo-kappaN1)-2-naphthalenolato(2-)-kappaO)-, hydrogen EINECS 257-803-6 Hydrogen bis(1-((2-hydroxy-5-nitrophenyl)azo)naphthalen-2-olato(2-))cobaltate(1-)