Sodium hydroxide, with the chemical formula of NaOH, commonly known as caustic soda, caustic soda and caustic soda, is a strongly corrosive alkali, generally in the form of flake or block, which is easily soluble in water (exothermic when dissolved in water) and forms an alkaline solution, otherwise it is easy to deliquesce and absorb water vapor (deliquescence) and carbon dioxide (deterioration) in the air. Hydrochloric acid can be added to check for deterioration.

use

Sodium hydroxide is mainly used in papermaking, cellulose pulp production, soap production, synthetic detergent, synthetic fatty acid and animal and vegetable oil extraction. Textile printing and dyeing industry is used as desizing agent, scouring agent and mercerizing agent for cotton cloth.

When sodium hydroxide is used as an alkaline reagent, it can be used as a neutralizer, a complexing masking agent, a precipitating agent, a precipitation masking agent, an absorbent for a small amount of carbon dioxide and water, and a chromogenic agent for the determination of ketosterols by TLC.

The above contents refer to Baidu Encyclopedia-Sodium hydroxide.