Cobaltate(3-),bis[3-(hydroxy-kO)-4-[[2-(hydroxy-kO)-1-naphthalenyl]azo-kN1]-7-nitro-1-naphthalenesulfonato(3-)]-,trihydrogen (9CI); Cobaltate(3-),bis[3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-7-nitro-1-naphthalenesulfonato(3-)]-,trihydrogen; 1-Naphthalenesulfonic acid,3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-7-nitro-, cobalt complex
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