Ammonium Bicarbonate CAS 1066-33-7 is a white compound with a chemical formula of NH4HCO3. It is in the form of granular, plate or columnar crystals with an ammonia smell. Ammonium bicarbonate is a carbonate, so it must not be placed with acid, because acid will react with ammonium bicarbonate to generate carbon dioxide, which will deteriorate ammonium bicarbonate. However, in rural areas, the ability of ammonium bicarbonate to react with acid is also used. The ammonium bicarbonate is placed in a vegetable greenhouse, the greenhouse is sealed, and the ammonium bicarbonate is placed on a high place, and dilute hydrochloric acid is added.. ZXCHEM