product description
Product Name: Borax decahydrate (sodium tetraborate decahydrate)
English name: Borax Deca Hydrate
Molecular formula: Na2B4O7.10H2O
Molecular weight: 381.37
CAS No.: 1303-96-4
Customs code: 28401900
Translucent colorless crystal or crystalline white powder; odorless, salty; heated to 350-400 ° C to lose all crystal water is anhydrous borax. (Na2B4O7), density 1.72g/cm3; soluble in water, soluble in glycerin, insoluble in alcohol. The aqueous solution is weakly alkaline and is colorless glass when molten. It has a bactericidal effect and is orally harmful to the human body. In terms of chemical composition, it is sodium tetraborate containing 10 water molecules. Its crystals are plate-like or columnar, and the crystals are grouped together to form clusters, granules, porous clods, etc., and the color is white, gray or yellowish, blue, green, etc., with a glass luster.
Borax is a colorless, translucent crystal or a white crystalline powder that is both soft and light. In terms of chemical composition, it is sodium tetraborate containing 10 water molecules. Borax is odorless and salty. Soluble in water, glycerin, slightly soluble in alcohol, aqueous solution is weakly alkaline. Borax is slowly weathered in air and becomes a colorless glassy substance when molten.
Borax technical indicators
Indicator name | Executive standard |
| First grade | Second-class product |
Sodium tetraborate (Na2 B4O7·10H2O)% | ≥99.5 | ≥95.0 |
Sodium carbonate (Na2 CO3), % ≤ | 0.1 | 0.2 |
Water insoluble matter, % ≤ | 0.04 | 0.04 |
Sodium sulfate (Na2 So4), % ≤ | 0.2 | 0.2 |
Sodium chloride (Na Cl), % ≤ | 0.03 | 0.05 |
Iron (Fe), % ≤ | 0.002 | 0.005 |
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Application range
· Borax has many uses. We are familiar with borax as a disinfectant, fresh preservative, water softener, eye wash, filler for washing powder and soap, ceramic glaze and glass.
· In the metallurgical industry, borax is used for calcination, welding and metal testing, and is a good flux. When welding metal, it is convenient to use borax to purify the metal surface.
· It is also a raw material for the manufacture of optical glass, enamel and enamel. In glass, it can enhance the transmittance of ultraviolet light, improve the transparency and heat resistance of glass; in enamel products, it can make the enamel not easy to fall off and make it shiny; in special optical glass, fiberglass, jewelry adhesive, Printing, dyeing, washing (silk and wool, etc.), gold refining, cosmetics, pesticides, fertilizers, borax soap, preservatives, antifreeze and medical disinfectants are also widely used.
· Borax is the basic raw material for the preparation of boron-containing compounds. Almost all of the boride-containing compounds can be prepared by borax. They have important and extensive applications in the metallurgy, steel, machinery, military, cutting, paper, tube, chemical and textile sectors; boron compounds borane can also be used for high-energy rocket fuel.
Storage and transportation precautions
1. This product is non-toxic, harmless, non-flammable, and non-explosive. It can be stored and transported according to general chemicals.
2, placed in a cool, dry place, rain, moisture, avoid eating.