Description: 
Appearance: gray powder.
Solubility: Soluble in hot hydrochloric acid released chlorine, soluble in hot sulfuric acid or nitrate liberate oxygen, very slightly soluble in cold acid, insoluble in water.
Used: Oxygen occurrence agent. Plating. Ferrite materials. Battery materials. The preparation of reduction nickel.
Storage: This product should be preservation in a sealed place.