High concernOther
PTFE
PFASEnvironmental persistence
What it is
A fluorinated polymer classified as a PFAS (per- and polyfluoroalkyl substance).
What it does
Creates slip and smoothness in cosmetics, dental floss, nonstick cookware, and waterproofing.
Why it’s a concern
PTFE is a fluoropolymer in the broad PFAS definition, but PTFE particles, PFOA exposure, and fumes from severe overheating are separate issues. A 2021 North American study found high total fluorine in 52% of 231 selected cosmetics and identified targeted PFAS in a smaller subset. Product detection does not establish migration, absorption, or health risk.
Also known as
polytetrafluoroethyleneteflon
CAS numbers
9002-84-0
Commonly found in
foundationdental flossnonstick cookwarewaterproof mascara
Safer alternatives
- silica powders for slip
- mica
- cast iron/ceramic cookware
Related chemical families
Sources
- Whitehead et al. 2021, ESTL
- Washington State SHB 1047