Taken from Green Health Watch-
Teflon gas the new DDT
Perfluoro-octanoic acid (PFOA), an ingredient of Teflon and also known as ‘C-8’, is a suspected carcinogen now found in humans, other animals and plants in the US, Europe and Asia. PFOA is very persistent. Released into the environment it looks as if it will take literally millions of years to biodegrade. The company ‘3M’ (which once manufactured PFOA) found that it took 4.4 years for just half of it to be excreted from workers’ bodies.
Where does it come from?
Some PFOA is released during the manufacture of Teflon, but it is thought that the majority is given off when pans and trays with Teflon coatings are heated to normal cooking temperatures and, of course, especially when allowed to overheat or burn dry in error. The average levels of PFOA (now found in 96% of Americans) are fivefold higher than can be attributed to releases from the chimneys of chemical company DuPont’s Teflon factories.
The latest DuPont studies show that Teflon emits toxic PFOA gas particulates at 446° Fahrenheit (F), but the lowest temperature linked to emissions by an independent study is 325°F.[1] (This was the temperature reached by an oven with a Teflon coating when baking biscuits.) In one case where this occurred, all the baby parrots in a cage in the owner’s kitchen died. DuPont does warn that fumes from cookware with teflon coating can be fatal for birds but, despite even its own evidence (see below), continues to deny that any emissions occur below temperatures well above those normally used for cooking. Dupont has also suggested that it is the fumes from the fat in highly-heated pans, rather than those from the Teflon coating itself, which are to blame for bird deaths. However, the biscuits which caused the parrots' deaths were being baked without oil.