Sodium carbonate [497-19-8] (Na2CO3), molecular weight 105.99. The purity of the chemical is more than 99.5% (mass fraction), also known as soda ash, but the classification belongs to salt and does not belong to alkali. Also known in international trade as soda or soda ash. It is an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze. It is also widely used in domestic washing, acid neutralization, and food processing.