As follows:

1. sodium hydroxide

Sodium hydroxide, also known as caustic soda, caustic soda and caustic soda, is an inorganic compound with the chemical formula of NaOH. Sodium hydroxide is strongly alkaline and corrosive, and can be used as acid neutralizer, complexing masking agent, precipitant, precipitation masking agent, color developing agent, saponifying agent, stripping agent, detergent, etc. , and is widely used.

August 26th, 2023: CSRC agreed to register caustic soda futures and options in Zhengzhou Commodity Exchange. In the next step, the CSRC will urge Zhengzhou Commodity Exchange to do a good job to ensure the smooth launch and steady operation of caustic soda futures and options.

2. Chemical properties

Sodium hydroxide is corrosive to fiber, skin, glass and ceramics. When dissolved or diluted with concentrated solution, heat will be released; The neutralization reaction with inorganic acids can also generate a lot of heat and generate corresponding salts; React with metal aluminum, zinc, nonmetal boron, silicon, etc. And release chemical books to generate hydrogen; Disproportionation reaction with chlorine, bromine, iodine and other halogens.

Can precipitate metal ions in aqueous solution into hydroxide; It can saponify oil and generate corresponding sodium salts and alcohols of organic acids, which is the principle of removing oil stains from fabrics.

3. Detection method

Check the inventory of sodium hydroxide at least once every quarter. Because sodium hydroxide will react with carbon dioxide in the air if it is left on the surface for too long, it is necessary to check the content of its effective components. After the sodium hydroxide sample is fully dissolved, it is titrated with standard hydrochloric acid solution, and at the same time, phenolphthalein is used as an indicator to determine the content of effective components of sodium hydroxide.

4. Application area

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. The chemical industry is used to produce borax, sodium cyanide, formic acid, oxalic acid, phenol and so on.

Petroleum industry is used to refine petroleum products and drilling mud in oil fields. It is also used for surface treatment of aluminum oxide, zinc metal and copper metal, as well as glass, enamel, tanning, medicine, dyes and pesticides.