Guide
The word is doing enormous work on packaging and almost none of it is defined. Here is what it means, where the science is genuinely unsettled, and the one distinction worth carrying into a shop.
Almost everything sold as “non-toxic cookware” is sold against one word, and hardly anyone selling it will tell you what the word means. So here is the definition, the argument about the definition, and the part that actually matters when you are standing in a shop.
PFAS is not one chemical. It is a class defined by structure — carbon atoms with fluorine attached, in a particular arrangement. The most widely used scientific definition, published by the OECD in 2021, covers any fluorinated substance containing at least one fully fluorinated methyl or methylene carbon.
That definition is deliberately broad, and it replaced a narrower one. The number of substances it captures runs to many thousands.
US states have mostly gone with an even simpler test. Maine’s statute defines PFAS as fluorinated organic chemicals “containing at least one fully fluorinated carbon atom”. Minnesota says materially the same thing. The EPA, meanwhile, uses different structural definitions in different programmes — there is no single federal one.
Teflon is a brand name for PTFE. PTFE is a chain of fully fluorinated carbons — which means it satisfies the OECD definition, Maine’s, Minnesota’s, and the one the EPA uses in its TSCA section 8(a)(7) reporting rule.
You do not have to take our word for this. The EPA’s own FAQ on its PFAS reporting rule asks directly whether fluoropolymers are exempt and answers: “No. There is no polymer exemption for this rule.” It then uses PTFE powder as the worked example. Minnesota’s pollution control agency is blunter: “Teflon™ will be prohibited from use in cookware.”
So the two claims you see on packaging are not synonyms:
Here the honest answer is less dramatic than either side would like.
PTFE is chemically inert at the temperatures most food is cooked at. Heat it far enough and it breaks down — but the published figures for where that starts range from about 260°C to about 400°C, depending on what is being measured. Manufacturers cite 260°C as a continuous-use ceiling. A medical reference, StatPearls, puts the onset of human symptoms around 350°C and pyrolysis at 400°C, with hydrogen fluoride and carbonyl fluoride above 500°C.
Does an ordinary pan get there? Contested, and the best-known evidence is twenty years old. The Environmental Working Group — an advocacy organisation, and we should say so — commissioned stovetop tests in 2003 reporting an average non-stick pan temperature of 736°F, and a maximum of 754°F, within minutes on an electric element. In the same document DuPont is quoted saying significant decomposition requires above about 660°F, well beyond normal cooking. Both statements are in the record. Neither has been settled since.
Birds die. Cornell’s veterinary college documents three ducks dying within twelve hours of exposure to a PTFE-coated heat lamp, and cites budgerigar research in which nine minutes of exposure to PTFE pyrolysis products killed 97% of the birds. If you keep birds, this is not a marginal risk and it is not folklore.
Polymer fume fever is real and mild: fever, aching, chest tightness, dry cough, usually within twelve hours, resolving in a day or two, per StatPearls. America’s Poison Centers data reported over 265 suspected cases in 2023, described as the highest since 2000. Those are phone calls to poison centres, not confirmed diagnoses — and when Caraway used rising “Teflon flu” case counts in its advertising, the National Advertising Division recommended it stop. It is worth knowing about; it is not an emergency.
A 2022 study using Raman imaging found that a single surface crack in a non-stick coating released around 9,100 particles, and a broken coating released millions. The researchers who measured it were careful about what it means: “more research is recommended to address the risk assessment”.
That is the state of it. Particle release is measured. The health consequence of swallowing those particles is not studied. There is no good evidence of harm and no good evidence of safety, and anyone confident in either direction is going past the literature.
The serious scientific dispute is not really about your pan. It is about whether fluoropolymers should be treated as “polymers of low concern”.
A 2018 review concluded they meet the criteria. Its authors were employees of W.L. Gore and Chemours, with consultants paid by Gore — which is disclosed in the paper and which you should know. A 2020 analysis in Environmental Science & Technology reached the opposite conclusion, finding no scientific rationale for it.
In 2025 a European agency came down closer to the second side. The European Environment Agency — an information body rather than a regulator — published a briefing, PFAS polymers in focus, which found that emissions of non-polymeric PFAS occur across the whole lifecycle, that all PFAS polymers are extremely persistent, and that incineration at standard European temperatures probably does not fully destroy them. It lists non-stick pans among the everyday consumer products these polymers turn up in, and says that for many such products suitable alternatives are available.
New scores, brands that finally answered, and any rule change that affects what you can buy. The list is not open yet — email us and we will add you when it is.