... ; Cobaltous sulfate, heptahydrate; Cobalt(II)Sulfate Heptahydrate; Cobalt monosulfate, heptahydrate; Cobalt sulfate, 7-hydrate; COBALT SULFATE, 99.999%; Sulfuric acid, cobalt salt, heptahydrate; sulfuric acid ... , cobalt(2+) salt (1:1), heptahydrate; Cobalt (II ...