Sodium carbonate is an inorganic compound with the chemical formula Na2CO3, molecular weight 105.99, also known as soda ash, but the classification belongs to salt, not alkali, also known as soda or alkali ash in international trade. Sodium carbonate is a white powder, tasteless and odorless, easily soluble in water, the aqueous solution is strongly alkaline, in humid air will absorb moisture and agglomerate, and part of it will become sodium bicarbonate. The production methods of sodium carbonate include combined alkali production method, ammonia alkali method, Lublan method, etc., and can also be processed and refined by natural alkali. It is an important inorganic chemical raw material mainly used in the production of flat glass, glass products and ceramic glazes. It is also widely used in household washing, acid neutralization and food processing.