Talk:Perfluorocarbon
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"PFC is 6000 times more effective than carbon-dioxide"
- "effective"? at what? is this some dual-meaning chemistry term?
- should mention that it can be used as artificial blood and can be breathed if saturated with oxygen. - Omegatron 14:44, Sep 30, 2004 (UTC)
[edit] 6000 times?
I think they mean 6000 times more potent than CO2 as a greenhouse gas. Link to Kyoto Protocol I guess.
Needs clarification.
[edit] Definition of Perfluorocarbon
Perfluorocarbons can refer to both short-chained fluorocarbons (C3F8, for example) and longer chain ones such as PTFE. In general, under the rubric of PFC, the fluoroindustry recognizes three distinct chemical families in addition to the short-chain fluorocarbons: polyfluorinated small molecules (surfactants, for example), polyfluorinated polymer sidechains with hydrocarbon backbones, and the classic per- or polyfluoropolymers.
The manufacturing processes of the longer chain ones have been plagued by PFOA and PFOA precursor impurities and potential breakdown products (such as the 8:2 FTOH molecule erroneously pictured as a perfluorocarbon in the article) which have only recently and partially been addressed see DuPont's Echelon products, for example. These longer chains impurities are not "non-toxic" as is stated in the article EPA stewardship program, but have been associated with cancer and developmental toxicities.
Fixing this with full info and citations will require several edits. I can't get started on this this week, but could address over the coming weeks.
Kristan 14:51, 23 April 2007 (UTC)
A perfluorocarbon contains carbon and fluorine only. A perfluorocarbon derivative may contain other atoms. The entry cutrrently says: "PFCs are made up of atoms of carbon, fluorine, and/or sulfur." which suggests a compound containing carbon and sulfur is a perfluorocarbon, which is clearly nonsense. And the image to the right is of a molecule containing hydrogen and oxygen.
I recommend a section on properties before Medicine, mentioning high gas solubility, low solubility with everything else, inert, biocompatible, high density. Then section on manufacture (perhaps with the history, connecting to Manhatten project). Later sections on applications can then build on that.
In the industrial section, mention the biggest source of CF4 in the atmosphere is aluminium production.
I will have a go at this myself if no one objects. F2Andy (talk) 12:13, 8 January 2008 (UTC)
[edit] usage in ransom cases
needs references 213.199.128.147 (talk) —Preceding comment was added at 14:51, 27 February 2008 (UTC)
