Ammonium Chloride is an inorganic, white crystalline, water-soluble powder with the formula NH4Cl, used chiefly in the manufacture of dry cells and as an expectorant. Also called sal ammoniac. The mineral is generally formed on blazing coal dumps due to condensation of coal-determined gasses. Ammonium chloride is the product from the reaction of hydrochloric acid and ammonia.
Ammonium chloride is acquired as a by-product in different chemical processes, particularly from the Solvay process for production of sodium carbonate from sodium chloride, ammonia, carbon dioxide and water.