Sodium Chloride (NaCl), the appearance is white crystal, its source is mainly in seawater, is the main component of salt. Soluble in water, glycerin, slightly soluble in alcohol, liquid ammonia; Insoluble in concentrated hydrochloric acid. Slightly deliquescent in air. Relatively good stability, industrial for the manufacture of soda ash and caustic soda and other chemical products, ore smelting, life can be used for condiments.