Please note that, as part of our continuing drive for efficiency and environmental care, all ECETOC publications are now distributed exclusively in electronic format.
Reports can be downloaded free of charge in PDF format from our website: see download buttons in the main publication lists and at the bottom of the abstracts and summaries.
ECETOC articles can be obtained via the publishers' websites and off-prints can be requested from the Secretariat (for members, where copyright allows). For these reasons, clicking the download link for an ECETOC article will result in a mail being sent to you with a link to the publisher's website.
This report has been produced as part of the ECETOC Joint Assessment of Commodity Chemicals (JACC) programme. It presents a critical evaluation of the toxicity and ecotoxicity data on 1,1,1,3,3-pentafluoropropane (HFC-245fa), including results of recent and unpublished toxicological studies conducted by Honeywell International. HFC-245fa, a colourless liquid or gas, is a non-ozone depleting alternative for trichlorofluoromethane (CFC-11) and dichlorofluoroethane (HCFC-141b). In the atmosphere, HFC-245fa degrades over a lifetime of 7.2 years, to give mainly carbon dioxide and hydrogen fluoride. Its global warming potential is 950 compared to carbon dioxide for an integration time horizon of 100 years. This compares with a global warming potential for CFC-11 of 4,000 and for HCFC-141b of 600. In experimental animals HFC-245fa possesses a low order of acute inhalation toxicity, although it may sensitise the heart at high exposure levels (44,000 ppm or greater; >241,000 mg/m³). Long-term exposure to HFC 245fa vapour at high concentrations (50,000 ppm; 274,000 mg/m³) was tolerated with only minimal signs of toxicity. At that level HFC 245fa demonstrated no developmental effects. In genetic testing, HFC 245fa was not mutagenic in bacteria (Ames test), but induced some chromosome aberrations in cultured human lymphocytes. No micronuclei were found in mice exposed (in vivo) to 100,000 ppm (548,000 mg/m³) of HFC-245fa. These data, complemented by data on analogous substances, suggest a low order of genotoxic and carcinogenic hazard on the part of HFC-245fa. With respect to environmental organisms, HFC 245fa showed no significant toxicity to water fleas or trout at 80 to 90 mg/l, the highest levels tested. As expected for this class of chemicals, biodegradation and bioaccumulation of HFC-245fa were minimal.