Cobalt Oxy-chloride, CoCl₂.3CoO.

Cobalt Oxy-chloride is obtained as a blue precipitate turning red on pouring a hot solution of cobalt chloride into dilute ammonium hydroxide. The formula CoCl₂.3CoO.3.5H₂O, has been attributed to it. Another basic salt, CoCl₂.Co(OH)₂.5H₂O, is stated to result as a precipitate by the action of calcium carbonate upon aqueous solutions of cobalt chloride.