Food & Feed Additives
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Molecular formula: LiF
C A S: 7789-24-4
Physical properties: white cubic crystal or powder. It was heated to volatilization 1100 ~ 1200 ℃. Its melting point 462 ℃. Dissolved in acid, slightly soluble in water (water solubility of 25 0.13G / 100ml), not soluble in ethanol and acetone. Relative density (d20) 2.640. A melting point of 848 ℃. Boiling point 1681 ℃.
Chemical properties: generating hydrogen fluoride and hydrofluoric acid lithium (LiHF2), lithium hydroxide and lithium fluoride generated, lithium hydroxide complex salt (LiF • LiOH),
Uses: used as a desiccant. Flux. Aluminum welding flux. For infrared spectrophotometer prism production, electronic components, enamels and glazes manufacturing. In the ceramic industry, for reducing kiln mild improvement in thermal shock resistance, abrasion resistance and acid resistance. And other fluoride, chloride and borate together for metal welding flux. It is an essential component of fluorine electrolyte cell. In the high-temperature molten state batteries as an electrolyte component. As a carrier in the breeder reactor. Used extensively for aluminum, magnesium alloy and solder flux is also used as the aluminum industry to improve the electrical efficiency of the additive; neutron shielding material used in atomic energy industry, molten salt reactors used as a solvent; optical glass material used as an ultraviolet transparent window (transmittance 77-88%), and the lithium battery industry.
Specification:
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LiF content not less than (%) |
99.0 |
99.9 |
99.99 |
|
|
Impurity content not more than |
Na |
0.5 |
0.005 |
0.001 |
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K |
0.001 |
0.0005 |
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Ca |
0.1 |
0.01 |
0.003 |
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|
Mg |
0.05 |
0.005 |
0.001 |
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|
Si |
0.05 |
0.01 |
0.005 |
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|
SO4 |
0.05 |
0.008 |
0.002 |
|
|
Fe |
0.005 |
0.005 |
0.0005 |
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|
Cl |
0.005 |
0.005 |
0.0005 |
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|
Al |
0.01 |
0.001 |
0.0005 |
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|
Cu |
--- |
0.001 |
0.0005 |
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Heavy metals (Pb) |
--- |
0.01 |
0.0005 |
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