Manufacturer high quality Anhydrous Borax/ Sodium tetraborate/ Sodium Borate cas 1330-43-4
Anhydrous Borax is also called sodium tetraborate, alpha orthorhombic crystal melting point 742.5℃,
Density 2.28g/cm3, β orthorhombic crystal melting point 664℃. Density 2.75, appearance is white crystal
or colorless glass-like crystal, strong hygroscopicity, soluble in water, Glycerin slowly dissolves in methanol to form a solution with a concentration of 13-16%. Its aqueous solution is weakly alkaline and insoluble in alcohol.
Anhydrous Borax is an anhydrous substance obtained when borax is heated to 350 ~ 400℃, When placed in the air, It can absorb moisture and become borax decahydtate or borax pentahydrate.
NOTE: Borax is stable crystal under normal storage conditions and will not react chemically, but if it gets
wet, it will release a trace of heat with water to produce borax decahydrate, so it needs to be stored properly and not exposed to humidity or temperature, in a changing environment, otherwise it will agglomerate. Therefore, it is necessary to ensure good packaging.
1. Other properties of anhydrous borax are simialr to borax
2. Anhydrous borax is used for high-quality glass, glaze, Welding flux, non-ferrous metals and alloy fluxes, etc...
3. Anhydrous borax is the basic raw material for preparing boron-containing compounds. Almost all boron-containing compounds can be made from borax.
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Inspection item
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Inspection index
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Anhydrous Borax (Na2B4O7), %
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≥ 95
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Boron trioxide, %
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≥ 68
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Sodium oxide, %
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≥ 31
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Sulfate, %
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≤0.4
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Chloride, %
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≤0.05
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Water insoluble matter, %
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≤0.06
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Moisture, %
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≤0.5
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Average particle size
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60 - 200 mesh
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25kg/bag
Or can be customized according to customer needs
Storage should be at cool, dry and ventilate.
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