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Perfluorobutane

DFB Halocarbon 610 R610 1594 kg/m3 (liquid, 101.3 kPa at boiling point)

Perfluorobutane (PFB) is an inert, high-density colorless gas. It is a simple fluorocarbon with a n-butane skeleton and all the hydrogen atoms replaced with fluorine atoms.

Uses

Perfluorobutane can replace Halon 1301 in fire extinguishers, as well as the gas component for newer generation microbubble ultrasound contrast agents. Sonazoid is one such microbubble formulation developed by Amersham Health that uses perfluorobutane for the gas core.

Due to its inert nature and high density, inhaling perfluorobutane makes one's voice deeper. Caution is advised as heavier gases are difficult to breathe out and may cause inert gas asphyxiation.

Environmental impacts

If perfluorobutane is released to the environment, it will not be broken down in air. It is not expected to be broken down by sunlight. It will move into air from soil and water surfaces. If it is exposed to conditions of extreme heat from misuse, equipment failure, etc., toxic decomposition products including hydrogen fluoride can be produced.

Perfluorobutane has an estimated lifetime greater than 2600 years. Perfluorobutane has a high global warming potential value of 4800. Its ozone depletion potential is zero.

References

References

  1. (2014). "Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book)". [[Royal Society of Chemistry.
  2. "Perfluorobutane (R610)". Air Liquide.
  3. "Summary Report: PERFLUOROBUTANE".
  4. (1996). "Perfluorobutane — Full Public Report". [[National Industrial Chemicals Notification and Assessment Scheme]].
  5. "Sonoazoid - US TIP".
  6. "Perflubutane".
  7. "Global Warming Potentials (IPCC Second Assessment Report)". United Nations Framework Convention on Climate Change.
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