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Pentafluoropropane

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Pentafluoropropane
Names
Preferred IUPAC name 1,1,1,3,3-Pentafluoropropane
Other names R-245fa; HFC-245fa; Enovate 3000; Genetron 245fa; AC1Q4KND; UNII-TA9UOF49CY
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.114.041 Edit this at Wikidata
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C3H3F5/c4-2(5)1-3(6,7)8/h2H,1H2Key: MSSNHSVIGIHOJA-UHFFFAOYSA-N
  • InChI=1/C3H3F5/c4-2(5)1-3(6,7)8/h2H,1H2Key: MSSNHSVIGIHOJA-UHFFFAOYAI
SMILES
  • FC(F)CC(F)(F)F
Properties
Appearance colorless gas
Density 1404.1 kg/m (liquid at 1 bar, 0 °C)
5.84 kg/m (vapor at 1 bar, 15 °C)
Boiling point 14.9 °C (58.8 °F; 288.0 K)
Solubility in water 7.18 g/L
log P 1.68
Hazards
Occupational safety and health (OHS/OSH):
Main hazards Simple Asphyxiant
Flash point −24.963 °C (−12.933 °F; 248.187 K)
Autoignition
temperature 		412 °C (774 °F; 685 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

1,1,1,3,3-Pentafluoropropane (HFC-245fa) is a hydrofluorocarbon is a colorless gas used primarily for closed-cell spray foam insulation. HFC-245fa is also known as pentafluoropropane and by its chemical name 1,1,1,3,3-pentafluoropropane.

Environmental Effects

Unlike CFC and HCFC blowing agents formerly used for this purpose, it has no ozone depletion potential and is nearly non-toxic. Although it is intended to remain trapped within the foam insulation, it is practically non-biodegradable with a lifetime of 7.2 years when it eventually does escape into the atmosphere. It does have a high global warming potential of 950 (950 times the global warming effect of CO2). Honeywell refers to this as "acceptable" in their literature, but they don't include the actual number.

Economics

One of the disadvantages of R-245fa is its cost. In 2000, R-141b cost one US dollar per pound, whereas R-245fa cost $2.50 to $4.00 per pound. As of 2007, and prior to Sinochem's production it was already a high volume production chemical, with over 1 million pounds produced annually.

Manufacturing history

Pentafluoropropane is produced by Honeywell and in Asia by Sinochem. Honeywell markets HFC-245fa under the Enovate and Genetron 245fa brand names. AlliedSignal, who adopted the Honeywell name after acquiring it, decided in 1999 to provide a non ozone depleting blowing agent as an alternative for dichlorofluoroethane (HCFC-141b) and trichlorofluoromethane (CFC-11). Competitors Atofina and General Electric pursued strategies using other agents.

See also

References

  1. Isobaric Properties for 1,1,1,3,3-Pentafluoropropane (R245fa), National Institute of Standards and Technology, retrieved 24 January 2021
  2. "Genetron® 245fa (R-245fa) | European Refrigerants".
  3. ^ Genetron 245fa Material Safety Data Sheet (PDF), Honeywell, September 2000, MSDS Number: GTRN-0040, retrieved May 29, 2012
  4. ^ HFC-245fa- Product Stewardship Summary (PDF), Honeywell, December 2007, retrieved 13 May 2012
  5. Other Gases: Hydrofluorocarbons, Perfluorocarbons, and Sulfur Hexafluoride, U.S. Energy Information Administration, retrieved 13 May 2012
  6. JACC 044 : 1,1,1,3,3-pentafluoropropane (HFC-245fa) (CAS No. 460-73-1), European Centre for Ecotoxicology, June 2004, retrieved 13 May 2012
  7. McCoy, Michael (October 30, 2000), "Regulatory Issues Heat Up For Blowing Agents", Chemical & Engineering News Archive, 78 (44): 22–23, doi:10.1021/cen-v078n044.p022, ISSN 0009-2347, archived from the original on August 23, 2011, retrieved May 3, 2020
  8. Sinochem and Honeywell Announce Formation of Joint Venture in China, Sinochem Group, October 10, 2011

External links

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