CAS no : 1066-33-7 MF: NH4HCO3 Purity: 99.2% Appearance: white crystal powder Ammonium bicarbonate usage: Ammonium bicarbonate is used in food industry as fermentation and leavening agent for making bread, puff pastries, flat breads, crackers, and cookies. It is considered to be a good leavening agent as it decomposes at a temperature less than 600C, and therefore does not give any unpleasant taste of ammonia, and thus, gives good taste to the food products.