Synonyms: Sodium bis(4-hydroxy-3-((5-hydroxynaphth(2,1-d)-1,3-oxathiol-4-yl)azo)benzenesulphonamide S,S-dioxidato(2-))cobaltate(1-);Cobaltate(1-), bis(4-hydroxy-3-((5-hydroxynaphth(2,1-d)-1,3-oxathiol-4-yl)azo)benzenesulfonamide S,S-dioxidato(2-))-, sodium