Hydrofluoric acid is solution of hydrogen fluoride gas. It is colorless liquid with irritant odor and is highly corrosive.
| Molecular formula | HF·H2O |
|---|---|
| Relative density | 1.15～1.18 |
| Boiling point | 112.2℃ |
| Appearance and properties | Aqueous solution of hydrogen fluoride gas is colorless transparent to pale yellow smoky liquid with irritant smell |
Physical properties
1. Hydrofluoric acid is highly volatile.
2. Hydrofluoric acid is non-inflammable, but it acts with most of the metal reactions and generates hydrogen and causes an explosion.
3. Hydrofluoric acid is highly dangerous, it causes ulcerate in contact with skin, its vapor is fatal in case of inhalation.
Hydrofluoric acid plays an important role in extracting aluminium and uranium.
Hydrofluoric acid can be used in atomic energy industry; in producing fluorine and fluoride; as catalyst and fluorinating agent; in producing organic and inorganic fluoride, and etc.
Hydrofluoric acid is highly corrosive to silicon compounds and harmful to tooth and bone. It should be kept in sealed plastic bottle
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