Sodium bicarbonate, commonly known as "baking soda" and "baking soda powder", is white and fine crystals, and its solubility in water is less than that of sodium carbonate. Solids begin to decompose gradually to produce sodium carbonate, carbon dioxide and water above 50℃, and completely decompose at 270℃. Sodium bicarbonate is an acid salt formed by neutralization of strong base and weak acid, and it is weakly alkaline when dissolved in water. This characteristic is often used as a leavening agent in food production. Sodium bicarbonate will remain sodium carbonate after the action, and too much use will make the finished product have an alkaline taste.