Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene (PTFE, trade name Teflon) is a fluoropolymer solid used as a particulate additive in multi-purpose lubricants and dry-film sprays. Suspended PTFE particles deposit on the treated surface as the carrier evaporates, leaving a low-friction, dust-shedding film. The polymer itself is chemically inert at normal operating temperatures and does not contribute to acute toxicity classifications in standard SDS testing.

PTFE is a recurring point of confusion on the PFAS question. Common regulatory definitions — OECD (2021), EPA TSCA Section 8(a)(7) PFAS reporting, the FDA PFAS-in-food-packaging framework — treat the high-molecular-weight polymer as a separate category from low-molecular-weight perfluorinated substances (PFOA, PFOS, GenX), the substances driving most PFAS health concern. PTFE is not on standard "PFAS substances" lists used by ECHA or EPA TSCA for hazardous PFAS. The polymerization aids historically used to make PTFE (PFOA) are PFAS — but in finished consumer lubricants the residual aid concentration is below detection limits in modern production. For CCT health-bar purposes a product containing only PTFE particles is not flagged contains_pfas: true, but the ingredient is documented here so future SDS reviews can re-evaluate as regulations evolve.

PTFE's persistence in the environment is real — the polymer is non-biodegradable and survives indefinitely on treated surfaces and in soil. For an aerosol multi-purpose lubricant the actual PTFE mass per application is small, and most stays on the mechanism rather than reaching waterways. Material compatibility is excellent: PTFE is safe on all common plastics, rubbers, and painted surfaces.