Synonyms: Cobaltate(1-),[4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]benzenesulfonamidato(2-)][4-hydroxy-3-[(5-hydroxynaphth[2,1-d]-1,3-oxathiol-4-yl)azo]benzenesulfonamideS,S-dioxidato(2-)]-, ammonium; Benzenesulfonamide,4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-, cobalt complex;Benzenesulfonamide,4-hydroxy-3-[(5-hydroxynaphth[2,1-d]-1,3-oxathiol-4-yl)azo]-, S,S-dioxide,cobalt complex; Naphth[2,1-d]-1,3-oxathiole, benzenesulfonamide deriv., cobaltcomplex; Naphth[2,1-d]-1,3-oxathiole, cobaltate(1-) deriv.