Sodium bicarbonate is commonly known as baking soda. Sodium bicarbonate is used as a starter in food industry, as a generator of carbon dioxide in soda and cold drinks, and as a preservative for butter. It can be directly used as raw material in pharmaceutical industry to treat hyperacidity. It can also be used in film production, tanning, mineral processing, smelting, metal heat treatment and fiber and rubber industries. At the same time, it is used as wool detergent, foam extinguishing agent, agricultural seed soaking and so on. One of the most widely used loosening agents in food industry is used to produce biscuits, cakes, steamed bread, bread and so on. , is the producer of carbon dioxide in soft drinks; It can be compounded with alum to form alkaline baking powder, or with soda ash to form civil caustic soda; It can also be used as a butter preservative. Fire fighting equipment is used to produce acid-base fire extinguishers and foam extinguisher. In rubber industry, it is used together with alum and H pore-forming agent, which plays an even role in pore-forming in rubber and sponge production. Metallurgical industry is used as flux for casting steel ingots. The machinery industry is used as a molding aid for sand molds of cast steel (sand casting). Printing and dyeing industry is used as fixing agent for printing and dyeing, acid-base buffer and post-treatment agent for fabric dyeing and finishing. Adding baking soda during dyeing can prevent the yarn tube from producing colored flowers. The pharmaceutical industry is used as the raw material of acid-making agent.