Sodium hydroxide is widely used. In chemical experiments, in addition to being used as a reagent, it can also be used as an alkaline desiccant because of its strong hygroscopicity. Caustic soda is widely used in the national economy, and many industrial sectors require caustic soda. The sector that uses the most caustic soda is the manufacture of chemicals, followed by papermaking, aluminum smelting, tungsten smelting, rayon, rayon and soap manufacturing. 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 inorganic salt production, the preparation of borax, chromium salts, manganates, phosphates, etc., also use A large amount of caustic soda. Industrial sodium hydroxide should meet the national standard GB 209-2006; 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 comply with national standard GB 5175-85.
In the industry, sodium hydroxide is often called caustic soda, or caustic soda, caustic soda. This is because the thicker sodium hydroxide solution splashes on the skin, which can corrode the epidermis and cause burns. It has a solubilizing effect on proteins, is highly irritating and corrosive (due to its solubility in proteins, alkali burns are less likely to heal than acid burns). Dropping into the rabbit eye with a 0.02% solution can cause corneal epithelial damage. Intraperitoneal LD50 of mice: 40 mg/kg, rabbit oral LDLo: 500 mg/kg. Dust irritates the eyes and respiratory tract, corrodes the nasal septum; splashes on the skin, especially on the mucous membranes, can produce soft palate, and can penetrate into deep tissues, leaving scars after burns; splashing into the eyes, not only damage the cornea, but also deep eyes Tissue damage, severe cases can cause blindness; misuse can cause digestive tract burns, colic, mucous membrane erosion, vomiting bloody stomach contents, bloody diarrhea, sometimes hoarseness, difficulty swallowing, shock, perforation of the digestive tract, stomach can occur later Intestinal stenosis. Due to its strong alkalinity, it can cause pollution to water bodies, and plants and aquatic organisms should be noted.