Ammonium Bicarbonate (NH4) HCO3 is a white crystalline sand-line compound. One of the prominent applications of this salt is a smelling agent due to ammonia. It is a normally stable chemical substance. Ammonium Bicarbonate is volatile salt with an ammonia odour. It gives a pungent smell when baked as its common name is now baking soda. It is served as an acidity regulator as ammonia is slightly more acidic. This inorganic compound is bicarbonate salt of ammonium ions. It is used in food processing.