Sodium hydroxide, with the chemical formula NaOH, commonly known as caustic soda, caustic soda, or caustic soda, is a highly corrosive strong alkali, usually in the form of flakes or blocks. It is easily soluble in water (releasing heat when dissolved in water) and forms an alkaline solution. It also has deliquescence and is easy to absorb water vapor (deliquescence) and carbon dioxide (deterioration) from the air. Hydrochloric acid can be added to test for deterioration.
Sodium hydroxide can be used as an alkaline cleaning agent in water treatment, soluble in ethanol and glycerol; Insoluble in propanol and ether. Disproportionation reaction occurs with halogens such as chlorine, bromine, and iodine. It can neutralization with acids to form salt and water
Sodium hydroxide is widely used in the national economy, and many industrial sectors require it. The department that uses sodium hydroxide more frequently is the manufacturing of chemical drugs, followed by papermaking, aluminum smelting, tungsten smelting, artificial silk, artificial cotton, and soap manufacturing. In addition, in the production of dyes, plastics, pharmaceuticals, and organic intermediates, the regeneration of old rubber, the electrolysis of metal sodium and water, and the production of inorganic salts, a large amount of caustic soda is also used to produce borax, chromium salts, manganese salts, phosphates, etc. Meanwhile, sodium hydroxide is one of the important raw materials for producing polycarbonate, super absorbent polymer, zeolite, epoxy resin, sodium phosphate, sodium sulfite, and a large amount of sodium salt.
