Manufacturers of chemical products are required to file a Safety Data Sheet — a standardized document that discloses hazards, physical properties, and decomposition behavior — with regulators when those chemicals are used in commercial products. Polytetrafluoroethylene, the polymer sold under the brand name Teflon and licensed to most major non-stick cookware manufacturers, has one.
It says more than the cookware brand's website usually does.
What the Safety Data Sheet discloses
The key section is thermal decomposition. PTFE's SDS lists three temperature thresholds:
- 260°C (500°F): PTFE begins to deteriorate. The polymer starts breaking down, releasing decomposition products into the air above the pan.
- 350°C (662°F): Significant decomposition begins. Concentrations of combustion products increase markedly.
- 400°C (752°F): Pyrolysis — the polymer begins breaking apart into smaller molecular fragments.
The SDS lists the decomposition products as: tetrafluoroethylene (TFE), difluorocarbene radicals, trifluoroacetic acid (TFA), hexafluoropropene, and longer-chain perfluoroalkyl carboxylic acids (PFCAs) ranging from C3 to C14.
These are not trace contaminants. TFA is a persistent environmental compound that accumulates in water systems. The longer-chain PFCAs are in the same chemical family as the PFAS chemicals that have prompted EPA action, consumer advisories, and manufacturing phase-outs across the past decade.
Polymer fume fever
The clinical literature documents a condition called polymer fume fever — a flu-like syndrome (fever, chills, headache, myalgias) with onset typically 4 to 10 hours after inhalation exposure to PTFE decomposition products. A 2015 review in Clinical Toxicology (Greenberg and Vearrier) describes it as associated with "overheating of Teflon-coated cookware" as one of the "more common mechanisms for exposure."
The condition generally resolves on its own, though the paper notes it "has the potential to be serious, especially in those with significant preexisting cardiorespiratory disease."
A 1973 study at DuPont's Haskell Laboratory — the company that manufactured Teflon — found that a four-hour exposure to fumes emitted by PTFE cookware heated to 280°C was lethal to parakeets.
When these temperatures are reached
The cookware industry's standard position is that normal cooking doesn't exceed 260°C, and that's largely accurate for meat seared at typical temperatures (204–232°C) with cooking oil in the pan. Most cooking oils reach their smoke point before 260°C, which functions as a visible warning signal.
The gap is preheating and pan neglect. An empty non-stick pan on high heat reaches 260°C in approximately two to five minutes depending on the burner and pan weight. At that point, PTFE decomposition has begun regardless of whether food has touched the surface.
That's the scenario the brand pages don't prominently address. The Safety Data Sheet does.
In your kitchen
The non-stick category has a practical advantage in daily cooking — ease of cleaning, lower fat use for certain preparations — that's real. The disclosure gap is about what happens when pans are preheated empty, left on high heat while the cook is elsewhere, or pushed past smoking temperature.
Ceramic-coated, stainless steel, enameled cast iron, and seasoned carbon steel are the alternatives on this site's list. None of them produce PFAS-family decomposition products at normal or high cooking temperatures. The tradeoffs — weight, seasoning requirements, sticking behavior — are real too.
If you're shopping now
The kitchen cookware section includes cookware filtered against PTFE and PFOA coatings. The criteria and why we apply them are on our promise page.
Cover image: Krzysztof Hepner via Unsplash (Unsplash License) — source.
