Soda ash, also known as sodium carbonate or baking soda, is divided into light and heavy types. Soda ash is sodium carbonate with a concentration of over 99.5%. Unlike ordinary edible alkali, edible alkali has low purity and can be added as a seasoning to dishes. High purity soda ash may burn the skin and can only be used in industrial production and food processing. Soda ash has active chemical properties, with very high melting and boiling points, and is easily hydrolyzed, making it a very important organic chemical material.