Samiksha Jaiswal (Editor)

Octafluoropropane

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Related compounds
  
Propane

Molar mass
  
188.02 g/mol

Density
  
8.17 g/cm³

Formula
  
C3F8

Boiling point
  
-36.7 °C

Melting point
  
-183 °C

Octafluoropropane httpsuploadwikimediaorgwikipediacommonsee

Thermodynamic data
  
Phase behaviour solid–liquid–gas

Appearance
  
Colorless gas with; faintly sweet odor

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.

Contents

Octafluoropropane how to pronounce it


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.

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 featured in some plans for terraforming Mars.

It is the active liquid in PICO-2L dark matter bubble detector (joined PICASSO and COUPP collaborations).

Liquid phase

  • Liquid density (1.013 bar at boiling point) : 1601 kg/m3
  • Liquid/gas equivalent (1.013 bar and 15 °C (59 °F)) : 196 vol/vol
  • Latent heat of vaporization (1.013 bar at boiling point) : 104.25 kJ/kg

    • Gaseous phase

  • Gas density (1.013 bar at boiling point) : 10.3 kg/m3
  • Gas density (1.013 bar and 15 °C (59 °F)) : 8.17 kg/m3
  • Compressibility Factor (Z) (1.013 bar and 15 °C (59 °F)) : 0.975
  • Specific gravity (air = 1) (1.013 bar and 21 °C (70 °F)) : 6.683
  • Specific volume (1.013 bar and 21 °C (70 °F)) : 0.125 m3/kg
  • Viscosity (1.013 bar and 0 °C (32 °F)) : 0.000125 Poise
  • Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 12.728 mW/(m·K)
  • Thermal Conductivity, Gas @ 101.325 kPa and 25 °C: 13.8 mW/(m·K)
  • Vapour Pressure @ 21.1 °C: 792 kPa

    • Major hazards

  • Greenhouse gas

    • References

    Octafluoropropane Wikipedia
    (Text) CC BY-SA