Ammonium Bicarbonate Freeflow is fine, white, crystalline powder or white crystals, slightly hygroscopic, freely soluble in water, practically insoluble in alcohol. It volatilizes rapidly at 60C. The volatilization takes place slowly at ambient temperatures if the substance is slightly moist. It is in a state of equilibrium with ammonium carbamate. Carbon dioxide (CO2) liberated from Ammonium bicarbonate is vital to the baking industry. It plays an important role in texturing the crumb structure and leavening. Gives off more CO2 per unit weight than any other brand.