CAS Numbe: 1303-96-4
Molecular formula: Na2B4O7.10H2O
Molecular weight: 381.37
Properties:
White crystalline powder. Specific gravity: 1.69-1.73. Hardness: 2-2.5. Easily soluble in water, insoluble in alcohol. Its solution is weak alkaline. It will lose all crystalline water and become anhydrous borax if heated to 350-400o C. It has sterilizing property, and is harmful to people if taken orally.
Use:
Borax is important material in glass, enamel, ceramic, non-ferrous metal and metallurgy industyr. In agriculture, it can be used as microelement fertilizer and disinfectant. In pharmaceutical industry, it is the basic material of boride and borane-based fuel.
GB537-1997
|
Item
|
Index
|
|
Best Quality
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Grade A
|
|
Disodium tetrabrate decahydrate (Na2B4O 0H2O)% ≥
|
99.5
|
95.0
|
|
B2O3 % ≥
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36.47
|
|
Carbonate (base on CO3 2- ) % ≤
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0.1
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0.2
|
|
Non-soluble matter in water % ≤
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0.04
|
0.04
|
|
Sulphate (base on SO4 2- ) % ≤
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0.1
|
0.2
|
|
Chloride (base on Cl - ) % ≤
|
0.03
|
0.05
|
|
Ferrum (Fe) % ≤
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0.002
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0.005
|
Package: 25kgs or 50kgs plastic woven bag.
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