Cobaltate(1-),bis[1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphthalenolato(2-)]-, sodium;Cobaltate(1-), bis[1-[[2-(hydroxy-kO)-4-nitrophenyl]azo-kN1]-2-naphthalenolato(2-)-kO]-, sodium (9CI); 2-Naphthalenol, 1-[(2-hydroxy-4-nitrophenyl)azo]-,cobalt complex
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