Borax, also known as crude borax [1], is a soft and light colorless crystalline substance. Chemically, it is a sodium tetraborate containing 10 water molecules. Its crystals are plate-like or columnar, and the crystals gather together to form clusters, particles, porous clods, etc. , the color is gray in white or light yellow, blue and green, with glass luster. Borax has many common uses, such as disinfectants, preservatives, water softeners, eye washing water, soap additives, ceramic glazes and glass raw materials. Borax also plays an important role in industrial production.

[Edit this paragraph] Physical and chemical properties

Colorless translucent crystal or white crystalline powder. Tasteless and salty. Specific gravity 1.73. At 320℃, all the crystallized water disappeared. Soluble in water and glycerol, slightly soluble in alcohol. The aqueous solution is weakly alkaline. Borax can be weathered slowly in the air. After melting, it becomes a colorless glassy substance. Borax has bactericidal effect, which is harmful to people by oral administration.

CASNo.: 1303-96-4

Molecular formula: Na2B4O7. 10H2O

Molecular weight: 38 1.37

Boiling point: 1575℃

Melting point: 320℃

Chinese name: borax

Sodium tetraborate (Ten Waters)

Lunatone sandy land

Huangyuesha

Borax (medicinal)

sodium tetraborate decahydrate

Lunatone sandy land

sodium tetraborate

English name: borax

borax

Sodium tetraborate decahydrate

Sodium borate decahydrate

antipyrine

sodium pyroborate

borax

use

Mainly used in glass and enamel industry. In glass, the ultraviolet transmittance can be enhanced, and the transparency and heat resistance of glass can be improved. In enamel products, it can make enamel not easy to fall off and shiny. It is also widely used in special optical glass, glass fiber, non-ferrous metal welding agent, jewelry adhesive, printing and dyeing, washing (silk and woolen goods) and so on. ), gold refining, cosmetics, pesticides, fertilizers, borax soap, preservatives, antifreeze and medical disinfectants. Borax is the basic raw material for preparing boron-containing compounds, and almost all borides can be prepared with borax. They are widely used in metallurgy, steel, machinery, military industry, cutting tools, paper making, electron tubes, chemicals and textiles.