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 due to 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 the manufacture 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, the electrolysis of water and the production of inorganic salts, the production of borax, chromium salts, manganates, phosphates, etc., should also be used. Lots of caustic soda.
In industry, sodium hydroxide is usually called caustic soda, or caustic soda, caustic soda. This is because the concentrated sodium hydroxide solution splashed on the skin will corrode the epidermis and cause burns. It has a dissolving effect on proteins, is strongly irritating and corrosive (due to its dissolving effect on proteins, alkali burns are less likely to heal than acid burns). Instilling 0.02% solution into rabbit eyes can cause corneal epithelial damage. Mice intraperitoneal LD50: 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 the mucous membranes, can produce soft scabs, and can penetrate deep tissues, leaving scars after burns; splashing into the eyes, not only damages the cornea, but also makes the deep part of the eye. Tissue damage, severe cases can lead to blindness; misuse can cause gastrointestinal burns, colic, mucosal erosion, vomiting bloody stomach contents, bloody diarrhea, sometimes hoarseness, dysphagia, shock, gastrointestinal perforation, and gastric perforation in the later stage. Intestinal narrowing. Due to the strong alkalinity, it can cause pollution to the water body, and attention should be paid to plants and aquatic organisms.
