The use of sodium hydroxide is very extensive. In chemical experiments, besides being used as a reagent, since it has a strong hygroscopicity, it can also be used as an alkaline desiccant. Caustic soda is widely used in the national economy, and many industrial sectors require caustic soda. The department that uses the most caustic soda is the manufacture of chemicals, followed by the manufacturing of paper, aluminum, tungsten, rayon, rayon and soap. In addition, in the production of dyes, plastics, pharmaceuticals and organic intermediates, the regeneration of old rubber, the production of sodium metal, water electrolysis, and the production of inorganic salts, the preparation of borax, chromium salts, manganese salts, phosphates, etc. must also be used. A lot of caustic soda. Industrial sodium hydroxide should meet the national standard GB 209-93; industrial ion exchange membrane method sodium hydroxide should meet the national standard GB/T 11199-89; chemical fiber sodium hydroxide should meet the national standard GB 11212-89; edible hydrogen Sodium oxide should meet the national standard GB 5175-85.

In industry, sodium hydroxide is commonly referred to as caustic soda or caustic soda and caustic soda. This is because the thicker sodium hydroxide solution splashes on the skin and can corrode the skin and cause burns. It has a solubilizing effect on proteins and is strongly irritating and corrosive (due to its solubility in proteins, alkali burns are less likely to heal than acid burns). With a 0.02% solution instilled into rabbit eyes, corneal epithelial damage can be caused. Intraperitoneal LD50: 40 mg/kg in mice and oral LDLo in rabbits: 500 mg/kg. Dust irritates the eyes and respiratory tract, and it erodes the septum; splashes on the skin, especially the mucous membranes, can produce soft palate, and can penetrate into deep tissues, leaving scars after burns; splashes into eyes, not only damages the cornea, but also deepens the eyes. Tissue damage, severe cases can cause blindness; misuse can cause gastrointestinal burns, cramps, mucosal erosion, vomiting bloody stomach contents, bloody diarrhea, sometimes dumbness, difficulty swallowing, shock, perforation of the digestive tract, can occur after the stomach Intestines narrow. Because of its strong alkalinity, it can cause pollution to water bodies and attention should be paid to plants and aquatic organisms.