A dense colorless gas which is polymerized to make plastics such as polytetrafluoroethylene.
- ‘The material safety data sheet for the mold-release spray indicated the presence of a small amount (less than 1%) of tetrafluoroethylene, a fluorocarbon monomer.’
- ‘The report states the listing is based on findings from laboratory animal studies of tetrafluoroethylene in which cancer was observed in multiple organs of multiple species following long-term inhalation exposures.’
- ‘Tetrafluoroethylene is listed in the 9th Report as "reasonably anticipated to be a human carcinogen."’
- ‘The pyrolysis of tetrafluoroethylene was studied in the temperature and pressure range 300 to 455C and 25 to 760 torr.’
- ‘The architects considered many options for the roof materials and finally chose an ultra-violet-stable fluoropolymer, ethylene tetrafluoroethylene, welded into cushions.’
We take a look at several popular, though confusing, punctuation marks.