Octafluorocyclobutane

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Octafluorocyclobutane
Structural formula of octafluorocyclobutane
Ball-and-stick of the octafluorocyclobutane molecule
Names
Preferred IUPAC name
Octafluorocyclobutane
Other names
Freon-C-318, perfluorocyclobutane
Identifiers
3D model (
JSmol
)
1909266
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard
 100.003.705 Edit this at Wikidata
EC Number
  • 204-075-2
E number E946 (glazing agents, ...)
131113
UNII
  • InChI=1S/C4F8/c5-1(6)2(7,8)4(11,12)3(1,9)10 ☒N
    Key: BCCOBQSFUDVTJQ-UHFFFAOYSA-N ☒N
  • InChI=1/C4F8/c5-1(6)2(7,8)4(11,12)3(1,9)10
    Key: BCCOBQSFUDVTJQ-UHFFFAOYAW
  • C1(C(C(C1(F)F)(F)F)(F)F)(F)F
Properties
C4F8
Molar mass 200.03 g/mol
Appearance colourless gas
Density 1.637 g/cm3 at −5.8 °C (liquid)

9.97 kg/m3 at −6 °C and 1 atm (gas)
8.82 kg/m3 15 °C and 1 atm (gas)

Melting point −40.1 °C (−40.2 °F; 233.1 K)
Boiling point −5.8 °C (21.6 °F; 267.3 K)
0.016 vol/vol (1.013 bar and 20 °C)
Viscosity 109e-6 Poise (1.013 bar and 0 °C)
Hazards
GHS labelling:
GHS04: Compressed GasGHS09: Environmental hazard
Warning
H280, H411
P273, P391, P410+P403, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Octafluorocyclobutane, or perfluorocyclobutane, C4F8, is an

C–F bonds
.

Production

Octafluorocyclobutane is produced by the dimerization of

1,2-dichloro-1,1,2,2-tetrafluoroethane.[1]

Applications

In the production of

ozone depleting chlorofluorocarbon refrigerants. Exploiting its volatility and chemical inertness, octafluorocyclobutane may be found in some aerosolized foods. It is listed by the Codex Alimentarius under number 946 (E946 for EU). It is investigated as a possible replacement for sulfur hexafluoride as a dielectric gas
.

Gallery

  • PFC-318 measured by the Advanced Global Atmospheric Gases Experiment (AGAGE) in the lower atmosphere (troposphere) at stations around the world. Abundances are given as pollution free monthly mean mole fractions in parts-per-trillion.
    PFC-318 measured by the Advanced Global Atmospheric Gases Experiment (AGAGE) in the lower atmosphere (troposphere) at stations around the world. Abundances are given as pollution free monthly mean mole fractions in parts-per-trillion.

References

  1. ISBN 978-3527306732
    ..
  2. ^ "Octafluorocyclobutane (RC318)". Gas Encyclopaedia. Air Liquide. Retrieved May 15, 2013.

Appendix

Its critical point is at 115.3 °C and 2.79 MPa.

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