Ammonium chloride, abbreviated as ammonium chloride, is an ammonium salt of hydrochloric acid, most of which is a by-product of the alkali industry. It contains 24%~26% nitrogen, colorless crystal or white granular powder, is a strong electrolyte, soluble in water and water to dissociate ammonium ions and chloride ions. Ammonia and hydrogen chloride combine to produce ammonium chloride will have white smoke, odorless, salty and bitter taste. Its aqueous solution is weakly acidic and becomes more acidic when heated.