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Silicon tetrafluoride
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| Names | |
|---|---|
| IUPAC names
Tetrafluorosilane
Silicon tetrafluoride | |
| Other names
Silicon fluoride
Fluoro acid air | |
| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.029.104 |
PubChem CID
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| RTECS number |
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| UNII | |
| UN number | 1859 |
CompTox Dashboard (EPA)
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| Properties | |
| SiF4 | |
| Molar mass | 104.0791 g/mol |
| Appearance | colourless gas, fumes in moist air |
| Density | 1.66 g/cm3, solid (−95 °C) 4.69 g/L (gas) |
| Melting point | −95.0 °C (−139.0 °F; 178.2 K)[2][3] |
| Boiling point | −90.3 °C (−130.5 °F; 182.8 K)[2] |
| Critical point (T, P) | −14.15 °C (6.5 °F; 259.0 K), 36.71 standard atmospheres (3,719.6 kPa; 539.5 psi)[1] |
| decomposes | |
| Structure | |
| tetrahedral | |
| 0 D | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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toxic, corrosive |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LCLo (lowest published)
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69.220 mg/m3 (rat, 4 hr)[4] |
| Safety data sheet (SDS) | ICSC 0576 |
| Related compounds | |
Other anions
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Silicon tetrachloride Silicon tetrabromide Silicon tetraiodide |
Other cations
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Carbon tetrafluoride Germanium tetrafluoride Tin tetrafluoride Lead tetrafluoride |
Related compounds
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Hexafluorosilicic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Silicon tetrafluoride or tetrafluorosilane is a chemical compound with the formula SiF4. This colorless gas is notable for having a narrow liquid range: its boiling point is only 4 °C above its melting point. It was first prepared in 1771 by Carl Wilhelm Scheele by dissolving silica in hydrofluoric acid,[5] and later synthesized by John Davy in 1812.[6] It is a tetrahedral molecule and is corrosive.[7]
- ^ Lide, David R.; Kehiaian, Henry V. (1994). CRC Handbook of Thermophysical and Themochemical Data (PDF). CRC Press. p. 28.
- ^ a b Silicon Compounds, Silicon Halides. Collins, W.: Kirk-Othmer Encyclopedia of Chemical Technology; John Wiley & Sons, Inc, 2001.
- ^ Cite error: The named reference
:1was invoked but never defined (see the help page). - ^ "Fluorides (as F)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ Greenwood & Earnshaw 1997, p. 328.
- ^ John Davy (1812). "An Account of Some Experiments on Different Combinations of Fluoric Acid". Philosophical Transactions of the Royal Society of London. 102: 352–369. doi:10.1098/rstl.1812.0020. ISSN 0261-0523. JSTOR 107324.
- ^ "Hazardous Substance Fact Sheet" (PDF). New Jersey Department of Health and Senior services. November 2001.
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