Octafluoropropane

• R 218
• Perfluoropropane

Colorless gas with ethereal odor

Gaseous

• 8.6524 kg · m 3 (0 ° C, 1013 mbar),
• 1.601 g · cm -3 ( liquid at boiling point)

-183 ° C

-36.6 ° C

7.67 bar (20 ° C)

Only slightly soluble in water

Attention

-1783.2 KJ / mol

Template: Infobox chemical / molecular formula search available

Octafluoropropane is a chemical compound selected from the group consisting of aliphatic, saturated halocarbons ( HFCs) and a representative of the perfluorocarbons.

Production and representation

Octafluoropropane can be prepared by electrochemical fluorination or by Fowler- process with the cobalt (II ) fluoride.

Properties

Octafluoropropane is a colorless, nonflammable gas with ethereal odor. It is heavier than air and is in compressed gas cylinders in liquid form. It also comes as a mixture with chlorodifluoromethane or propane in the trade. When flowing the liquid or at the escape of large quantities of gas to cold mists that spread on the ground form. Over 800 ° C the compound decomposes. Their critical temperature is 71.9 ° C, the critical pressure of 26.8 bar, the critical density at 0.628 kg / l and the triple point temperature of -148.3 ° C. The global warming potential is 7000 and the ozone depletion potential is 0

Use

Octafluoropropane is used in the electronics industry as a mixture with oxygen to the plasma etching of silicon dioxide.

In medicine it is used in ultrasound in cardiology as a contrast enhancer.

R 218 as it is used in industry as refrigerants.