160158-50-9 70236-59-8 Cobaltate(1-), bis(6-(amino-kappaN)-5-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-N-methyl-2-naphthalenesulfonamidato(2-))-, sodium Cobaltate(1-), bis(6-amino-5-((2-hydroxy-4-nitrophenyl)azo)-N-methyl-2-naphthalenesulfonamidato(2-))-, sodium