Ammonium Bicarbonate is an inorganic compound with the formula HCO₃ simplified to NHCO2. The compound has many names reflecting its long history. Chemically, it is the bicarbonate salt of the ammonium ion. It is a colorless solid that readily decomposes into carbon dioxide, water and ammonia. Ammonium Bicarbonate is used in the food industry as a leavening agent for flat bakery products such as cookies and crackers.