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.
|Preferred IUPAC name
R-245fa; HFC-245fa; Enovate 3000; Genetron 245fa; AC1Q4KND; UNII-TA9UOF49CY
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||134.049 g·mol−1|
|Density||1404.1 kg/m3 (liquid at 1 bar, 0 °C)|
5.84 kg/m3 (vapor at 1 bar, 15 °C)
|Boiling point||15.3 °C (59.5 °F; 288.4 K)|
|Main hazards||Simple Asphyxiant|
|Flash point||−24.963 °C (−12.933 °F; 248.187 K)|
|412 °C (774 °F; 685 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 CO
2). Honeywell refers to this as "acceptable" in their literature, but they don't include the actual number.
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.
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.
- 1,1,1,3,3-pentafluoropropane - CAS # 460-73-1, Columbia Analytical Services, retrieved May 2012 Check date values in:
- Isobaric Properties for 1,1,1,3,3-Pentafluoropropane (R245fa), National Institute of Standards and Technology, retrieved 24 January 2021
- Genetron 245fa Material Safety Data Sheet (PDF), Honeywell, September 2000, MSDS Number: GTRN-0040, retrieved May 29, 2012[permanent dead link]
- HFC-245fa- Product Stewardship Summary (PDF), Honeywell, December 2007, retrieved 13 May 2012
- Other Gases: Hydrofluorocarbons, Perfluorocarbons, and Sulfur Hexafluoride, U.S. Energy Information Administration, retrieved 13 May 2012
- 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
- McCoy, Michael (October 30, 2000), "Regulatory Issues Heat Up For Blowing Agents", Chemical and Engineering News Online, 78 (44): 22–23, ISSN 0009-2347, archived from the original on August 23, 2011, retrieved May 3, 2020
- Sinochem and Honeywell Announce Formation of Joint Venture in China, Sinochem Group, October 10, 2011