Main applications

Sodium hydroxide has a wide range of uses. 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 caustic soda is needed in many industrial sectors. 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 electrolysis of sodium metal and water, and the production of inorganic salts, the production of borax, chromium salts, manganates, phosphates, etc., should also be used Lots of caustic soda. Sodium hydroxide for industrial use shall comply with the national standard GB209-2006; sodium hydroxide for industrial ion exchange membrane shall comply with the national standard GB/T11199-89; sodium hydroxide for chemical fiber shall comply with the national standard GB11212-89; Meet the national standard GB5175-85. In industry, sodium hydroxide is usually called caustic soda, or caustic soda, caustic soda Chemicalbook. This is because the concentrated sodium hydroxide solution splashed on the skin will corrode the epidermis and cause burns. It dissolves proteins and is highly irritating and corrosive (alkali burns are less likely to heal than acid burns due to their protein solubility). Instilling 0.02% solution into rabbit eyes can cause corneal epithelial damage. Intraperitoneal LD50 of mice: 40mg/kg, oral LDLo of rabbits: 500mg/kg. Dust irritates the eyes and respiratory tract, corrodes the nasal septum; splashes on the skin, especially mucous membranes, can produce soft scabs, and can penetrate into deep tissues, leaving scars after burns; splashing into the eyes will not only damage the cornea, but also make the deep part of the eyes Tissue damage, severe cases can cause blindness; misuse can cause digestive tract burns, colic, mucosal erosion, vomiting of bloody stomach contents, bloody diarrhea, sometimes hoarseness, dysphagia, shock, perforation of the digestive tract, and gastric A narrowing of the intestine. Due to strong alkalinity, it can cause pollution to water bodies, and attention should be paid to plants and aquatic organisms.