Octafluoropropane
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| Names | |||
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IUPAC name
Octafluoropropane
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| Other names
Freon 218
Perfluoropropane RC 218, PFC 218 R218 Flutec PP30 genetron 218 |
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| Identifiers | |||
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3D model (JSmol)
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| ChEBI | |||
| ChemSpider | |||
| DrugBank | |||
| ECHA InfoCard | 100.000.857 | ||
| KEGG | |||
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PubChem CID
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| RTECS number | TZ5255000 | ||
| UNII | |||
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| Properties | |||
| C3F8 | |||
| Molar mass | 188.02 g/mol | ||
| Appearance | Colorless gas with faintly sweet odor |
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| Density | 8.17 g/l, gas | ||
| Melting point | −183 °C (−297.4 °F; 90.1 K) | ||
| Boiling point | −36.7 °C (−34.1 °F; 236.5 K) | ||
| Structure | |||
| 0.014 D | |||
| Hazards | |||
| Main hazards | Suffocation | ||
| Safety data sheet | See: data page | ||
| R/S statement (outdated) | R: ? S: ? |
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| NFPA 704 | |||
| Flash point | N/A | ||
| Related compounds | |||
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Related halocarbons
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Tetrafluoromethane Hexafluoroethane |
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Related compounds
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Propane | ||
| Supplementary data page | |||
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Refractive index (n), Dielectric constant (εr), etc. |
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Thermodynamic
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Phase behaviour solid–liquid–gas |
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| UV, IR, NMR, MS | |||
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |||
Octafluoropropane (C3F8) is a fluorocarbon non-flammable greenhouse gas that can be produced either by electrochemical fluorination or by the Fowler process using cobalt fluoride.
In the electronics industry, octafluoropropane is mixed with oxygen and used as a plasma etching material for SiO2 layers in semiconductor applications, as oxides are selectively etched versus their metal substrates.
In medicine, octafluoropropane may compose the gas cores of microbubble contrast agents used in contrast-enhanced ultrasound. Octafluoropropane microbubbles reflects sound waves well and are used to improve the ultrasound signal backscatter. It is also used in pars plana vitrectomy procedures where a retina hole or tear is repaired. The gas acts to provide a long-term tamponade, or plug, of a retinal hole/tear and allows re-attachment of the retina to occur over the following several days post-op.
Under the name R-218, octafluoropropane is used in other industries as a component of refrigeration mixtures.
It has been featured in some plans for terraforming Mars. With a greenhouse gas effect 24,000 times greater than CO2, octafluoropropane could dramatically reduce the time and resources it takes to terraform Mars.
It is the active liquid in PICO-2L dark matter bubble detector (joined PICASSO and COUPP collaborations).
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