Back Silikontetrafluoried Afrikaans رباعي فلوريد السيليكون Arabic تترافلوئورید سیلیسیوم AZB Tetrafluorur de silici Catalan Fluorid křemičitý Czech Tetrafluorsilan German Tetrafluoruro de silicio Spanish سیلیسیم تترافلوئورید Persian Piitetrafluoridi Finnish Tétrafluorure de silicium French
| |
| |
| Names | |
|---|---|
| IUPAC names
Tetrafluorosilane
Silicon tetrafluoride | |
| Other names
Silicon fluoride
Fluoro acid air | |
| Identifiers | |
3D model (JSmol)
|
|
| ECHA InfoCard | 100.029.104 |
PubChem CID
|
|
| RTECS number |
|
| UNII | |
| UN number | 1859 |
CompTox Dashboard (EPA)
|
|
| |
| 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
|
toxic, corrosive |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LCLo (lowest published)
|
69.220 mg/m3 (rat, 4 hr)[4] |
| Safety data sheet (SDS) | ICSC 0576 |
| Related compounds | |
Other anions
|
Silicon tetrachloride Silicon tetrabromide Silicon tetraiodide |
Other cations
|
Carbon tetrafluoride Germanium tetrafluoride Tin tetrafluoride Lead tetrafluoride |
Related compounds
|
Hexafluorosilicic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
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] 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.