Molecular formula: Na2B4O7•10H2O
Molecular weight: 381.37
GB537-1997
Item |
Index |
Best Quality |
Grade A |
| Disodium tetrabrate decahydrate (Na2B4O7•10H2O)% ≥ |
99.5 |
95.0 |
| Carbonate (base on CO32-) % ≤ |
0.1 |
0.2 |
| Non-soluble matter in water % ≤ |
0.04 |
0.04 |
| Sulphate (base on SO42-) % ≤ |
0.1 |
0.2 |
| Chloride (base on Cl-) % ≤ |
0.03 |
0.05 |
| Ferrum (Fe) % ≤ |
0.002 |
0.005 |
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 350-400ºC. 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.
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