Ammonium bicarbonate is the carbonate of ammonia, with the molecular formula NH4HCO3. Ammonium bicarbonate can also be obtained by passing carbon dioxide into ammonium carbonate solution. It is a white powder with a strong ammonia odor and is easily soluble in water. When ammonium bicarbonate solution is placed in the air or heated, carbon dioxide is released and the solution becomes alkaan>Ammonium bicarbonate, also known as soda ash and baking soda, is a chemical that releases carbon dioxide. In baked goods, ammonium bicarbonate can react with acidic substances in flour (usually yogurt, vinegar or lemon juice, etc.) to produce a large of bubbles, thereby making the food expand in volume and have a softer texture.