Tetrafluoroethylene
A substance that is a possible carcinogen (cancer-causing agent) used in the production of polymers such as polytetrafluoroethylene.
The US government in 2000 classified tetrafluoroethylene as 'reasonably anticipated to be a human carcinogen.' In laboratory animal studies of tetrafluoroethylene, cancer was observed in multiple organs of multiple species following long-term inhalation exposures.