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Octafluoropropane

Perfluoropropane RC 218, PFC 218 R-218 Flutec PP30 Genetron 218 | NFPA-H = 1 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S = SA Hexafluoroethane

Octafluoropropane (C3F8) is the perfluorocarbon counterpart to the hydrocarbon propane. This non-flammable and non-toxic synthetic substance has applications in semiconductor production and medicine. It is also an extremely potent greenhouse gas.

Manufacture

Octafluoropropane can be produced either by electrochemical fluorination or by the Fowler process using cobalt fluoride.{{cite journal

Applications

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.{{cite journal

In medicine, octafluoropropane may compose the gas cores of microbubble contrast agents used in contrast-enhanced ultrasound. Octafluoropropane microbubbles reflect sound waves well and are used to improve the ultrasound signal backscatter.

It is used in eye surgery, such as pars plana vitrectomy procedures where a retina hole or tear is repaired. The gas provides a long-term tamponade, or plug, of a retinal hole or tear and allows re-attachment of the retina to occur over the several days following the procedure.

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 carbon dioxide (CO2), octafluoropropane could dramatically reduce the time and resources it takes to terraform Mars.

It is the active liquid in the detectors used in the PICO dark matter search experiment, including the under-construction PICO-500 detector.

References

References

  1. "Encyclopédie des gaz". air liquide.
  2. D. Rogers. (February 2018). ["Studies in the Future of Experimental Terraforming"](http://pdf.aiaa.org/preview/CDReadyMIAF05_1429/PVIAC-05-D4.1.06.pdf}}{{dead link). International Academy of Astronautics, and the International Institute of Space Law.
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