Sodium hydroxide, also known as caustic soda, is an inorganic compound with the chemical formula NaOH. Sodium hydroxide is strongly alkaline and highly corrosive. It can be used as acid neutralizer, complex masking agent, precipitant, precipitation masking agent, color developer, saponification agent, peeling agent, detergent, etc., and has a wide range of uses.
CAS: 1310-73-2
EINECS: 215-185-5
Molecular weight: 40.00
Appearance: white flake, granular
Solubility: soluble in water, ethanol, glycerin, insoluble in acetone, ether
Chemical properties
Sodium hydroxide has a corrosive effect on fibers, skin, glass, ceramics, etc., and it will release heat when it is dissolved or diluted with a concentrated solution; it can also generate a lot of heat when it reacts with inorganic acids to generate corresponding salts; it can react with metal aluminum and zinc , Non-metallic boron and silicon react to release hydrogen; disproportionation reaction occurs with chlorine, bromine, iodine and other halogens. It can precipitate metal ions from aqueous solution to form hydroxide; it can cause saponification reaction of oil to generate corresponding sodium salt of organic acid and alcohol, which is the principle of removing oil stains on fabrics.
Application field
▶ Sodium hydroxide is mainly used in papermaking, cellulose pulp production, soap, synthetic detergent, synthetic fatty acid production and refining of animal and vegetable oils.
▶ In textile printing and dyeing industry, it is used as desizing agent, scouring agent and mercerizing agent for cotton cloth.
▶ In the chemical industry, it is used to produce borax, sodium cyanide, formic acid, oxalic acid, phenol, etc.
▶ It is used in the petroleum industry to refine petroleum products and is used in oilfield drilling mud.
▶ It is also used in the production of alumina, surface treatment of metal zinc and metal copper, as well as glass, enamel, leather, medicine, dyes and pesticides.
▶ Food-grade products are used as acid neutralizers in the food industry, as peeling agents for citrus and peaches, as well as detergents for containers such as empty bottles and cans, as well as decolorizers and deodorizers.
▶ When sodium hydroxide is used as a basic reagent, it can be used as a neutralizer, a complex masking agent, a precipitant, a precipitation masking agent, an absorbent for a small amount of carbon dioxide and water, and a color developer for the determination of ketone sterol by thin-layer analysis. It is widely used Used in the manufacture of various sodium salts, soaps, pulp, finishing cotton, silk, viscose fibers, regeneration of rubber products, metal cleaning, electroplating, bleaching, etc.
▶ In cosmetic creams, saponification such as sodium hydroxide and stearic acid acts as an emulsifier to make creams, shampoos, etc.
Storage method
Sodium hydroxide should be stored in a cool, dry and well-ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 35°C, and the relative humidity should not exceed 80%. The packaging must be sealed and kept away from moisture. It should be stored separately from flammable (combustible) materials, acids, etc., and should not be stored together. Storage areas should be equipped with suitable materials to contain spills.
Post time: Aug-30-2023