Can clean facial skin. The skin is weakly acidic, and baking soda powder is weakly alkaline. Washing your face with baking soda is easy to clean the dirt and pores on your face, but you can't use it too often. Use it once or twice a week, and then use the pore-shrinking product after use.

Soda powder, also known as sodium bicarbonate, is a white fine crystal, and its solubility in water is less than that of sodium carbonate. Solids above 50℃ begin to decompose gradually to produce sodium carbonate, carbon dioxide and water, and completely decompose at 270℃. Sodium bicarbonate is an acid salt formed by neutralization of strong alkali and weak acid, which is weakly alkaline when dissolved in water. This characteristic can make it a leavening agent in food production. Sodium carbonate will remain after the action of sodium bicarbonate, and excessive use will make the finished product have an alkaline taste.