Potassium fluoride
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| Names | |
|---|---|
| IUPAC name
Potassium fluoride
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| Identifiers | |
| ECHA InfoCard | 100.029.228 |
| EC Number |
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| RTECS number |
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CompTox Dashboard (EPA)
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| Properties | |
| KF | |
| Molar mass | 58.10 g/mol |
| Appearance | colourless crystals |
| Density | 2.48 g/cm3 |
| Melting point | 846 °C |
| Boiling point | 1505 °C |
| soluble | |
| Solubility in liquid hydrogen fluoride | soluble |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Other anions
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Potassium chloride Potassium bromide Potassium iodide |
Other cations
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Lithium fluoride Sodium fluoride Rubidium fluoride Caesium fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium fluoride is the chemical compound with the formula KF. After hydrogen fluoride, KF is the primary source of the fluoride ion for applications in manufacturing and in chemistry. It is an alkali metal halide and occurs naturally as the rare mineral carobbiite. Aqueous solutions of KF will etch glass due to the formation of soluble fluorosilicates, although HF is more effective.
Applications in organic chemistry
In organic chemistry, KF is the preferred source of fluoride for the conversion of chlorocarbons into fluorocarbons.[1] Such reactions usually employ polar solvents such as dimethyl formamide, ethylene glycol, and dimethyl sulfoxide.[2]
Safety considerations
Like other sources of the fluoride ion, F−, KF is poisonous, although lethal doses approach gram levels for humans. It is harmful by inhalation and ingestion, highly corrosive and skin contact may cause severe burns.
References
- ^ Vogel, A. I.; Leicester, J.; Macey, W. A. T. "n-Hexyl Fluoride". Organic Syntheses
{{cite journal}}: CS1 maint: multiple names: authors list (link); Collected Volumes, vol. 4, p. 525. - ^ Han, Q.; Li, H-Y. "Potassium Fluoride" in Encyclopedia of Reagents for Organic Synthesis, 2001 John Wiley & Sons,New York. DOI: 10.1002/047084289X.rp214
External links
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