How Teflon Ended Up Everywhere

It's Saturday, September fifth. I was cooking breakfast this morning — eggs, the way I do almost every morning — and I was using the stainless steel pans my parents got me for Christmas last year. I had seen them on social media. People rave about these things. The sear, the fond, the way nothing sticks once you learn how to heat them properly. I sent the link to my parents. They got them for me. I use them every day. Here is what I did not think about while I was standing over the stove: that before stainless steel pans, before ceramic pans, before any of the modern alternatives, the entire American kitchen was reorganized around Teflon — a coating discovered completely by accident on a Wednesday morning in nineteen thirty-eight. A chemist named Roy Plunkett, twenty-seven years old, opened a gas cylinder expecting gas and got a solid instead. What he found that morning would end up on frying pans, on space suits, on the nose cones of missiles, inside artificial heart valves, and on the dome of the Pontiac Silverdome — which, by the way, is the largest roof in the world held up by air pressure. It also left a chemical footprint in the blood of virtually every person on Earth.

Roy Plunkett grew up in New Carlisle, Ohio, the son of a farmer. He got his bachelor's degree from Manchester College in Indiana and his PhD from Ohio State in nineteen thirty-six, then immediately went to work for DuPont. His assignment was unglamorous: develop new chlorofluorocarbon refrigerants. Freon had been a massive success for DuPont and the company wanted more compounds in that family. Plunkett was working with a gas called tetrafluoroethylene, or TFE, which is two carbon atoms wrapped in four fluorine atoms. It was supposed to be a building block for new refrigerants.

The morning of April sixth, Plunkett and his assistant Jack Rebok set up their apparatus as usual. They had TFE gas stored in small pressurized cylinders, about a pound each, chilled with dry ice to keep the gas from decomposing. Rebok opened the valve — and nothing. The pressure gauge read zero. They tried a second cylinder, same result. They weighed them. Each cylinder still had its full weight. The gas was in there. Something had happened to it.

Plunkett did not write off the cylinders as defective and move on. He unscrewed the valve, saw nothing visible, tipped the cylinder over, and out came a small amount of slippery white powder. He scraped at the inside with a wire and got more. Still not accounting for the full weight. So he and Rebok sawed one of the cylinders open. Inside, packed against the walls, was a thick layer of the same white waxy solid. The TFE gas, under pressure and cold, had spontaneously polymerized — all those tiny gas molecules had linked themselves into enormous chains. Polytetrafluoroethylene. PTFE. Teflon.

Plunkett did not fully understand what he had made. But he ran tests. He hit it with heat — it did not melt until six hundred twenty degrees Fahrenheit. He doused it in acid — nothing. He tried to dissolve it in every solvent he could find — nothing worked. He measured its friction and found it was one of the slipperiest solids ever recorded, comparable to wet ice sliding on wet ice. A gecko could not stick to this material.

DuPont saw the potential but had no immediate use for it. The company filed a patent in nineteen thirty-nine, trademarked the name Teflon in nineteen forty-five, and spent the next two decades figuring out how to stick it to things — which turns out to be very hard, because the whole point of the material is that nothing sticks to it.

The first major application was military, and it was secret. The Manhattan Project needed a material that could handle uranium hexafluoride, one of the most corrosive gases known. Uranium hexafluoride eats through steel. It chews through glass. PTFE, with its carbon-fluorine bonds — among the strongest single bonds in all of chemistry — shrugged it off. The engineers making the atomic bomb coated their valves, gaskets, and pipe linings with Teflon. Nobody outside the project knew about it until after the war.

After World War Two, Teflon spread into industry. It coated industrial molds so plastic and rubber parts would release cleanly. It lubricated bearings and seals in chemical plants. It insulated wires in jet engines.

Then came the frying pan. In nineteen fifty-four, a French engineer named Marc Grégoire was refinishing fishing rods with PTFE when his wife Colette suggested he coat her cooking pans. The idea seems obvious in retrospect — a surface nothing sticks to, on the thing where food sticks most. Grégoire founded Tefal — which combines Teflon and aluminum — and by nineteen sixty-one, Teflon-coated pans were selling in the United States. The Happy Pan. "No oil, no sticking, no scouring." American kitchens transformed almost overnight.

But the story does not stop at kitchens. The carbon-fluorine bond that makes PTFE so stable also makes it biocompatible. Your body does not react to it. So surgeons began using it for arterial grafts, hernia patches, facial implants. A version called expanded PTFE — basically Teflon stretched into a microscopic web — is so porous that tissue can grow through it while blood cannot leak out. It is used in vascular surgery, in dental procedures, in the waterproof-breathable membrane inside your Gore-Tex jacket. The same chemistry that keeps scrambled eggs from sticking to your pan also keeps a synthetic blood vessel from clotting inside your body.

By the nineteen eighties, Teflon was on the Statue of Liberty's internal structure as a corrosion barrier. It coated the roof of the Pontiac Silverdome as a fiberglass-Teflon fabric — ten acres of it, held up by air pressure, light enough that it weighed less than a pound per square foot. It went into space. NASA used PTFE on spacesuits, on thermal blankets, on the heat shields of reentry vehicles. The Apollo lunar lander had PTFE-insulated wiring. The Mars rovers use it in their bearings. The same material Plunkett scraped out of a cylinder with a wire is now rolling around on another planet.

PTFE itself is inert and safe. But making it required a chemical called perfluorooctanoic acid, or PFOA, also known as C8. PFOA is a surfactant — it helps the TFE gas polymerize evenly. And PFOA does not break down. Not in water, not in soil, not in the human body. It belongs to a class of chemicals called PFAS — per- and polyfluoroalkyl substances — often called forever chemicals. The carbon-fluorine bond that makes Teflon so useful is the exact same reason these chemicals never go away.

For decades, DuPont dumped PFOA into the Ohio River and into unlined pits near its Parkersburg, West Virginia plant. The company knew PFOA was accumulating in workers' blood. It knew animal studies showed liver damage, birth defects, and cancer. Internal documents from the nineteen sixties and seventies show that DuPont was aware PFOA was toxic and persistent. They did not tell the public. They did not tell their workers.

The exposure came to light in the late nineteen nineties when a West Virginia farmer named Wilbur Tennant noticed his cattle were dying. Strange tumors, blackened teeth, grotesque birth defects. His farm sat downstream from a DuPont landfill. A lawyer named Rob Bilott took the case, sued DuPont, and forced the company to release its internal documents — tens of thousands of pages. DuPont eventually settled a class-action lawsuit for six hundred seventy million dollars, covering roughly seventy thousand people whose drinking water had been contaminated. Bilott's story became the movie Dark Waters.

DuPont phased out PFOA in two thousand fifteen. Its replacement, a chemical called GenX, belongs to the same PFAS family and may turn out to be similarly harmful. The EPA has since proposed drinking water limits for PFAS chemicals measured in parts per trillion — so small that a single drop in twenty Olympic swimming pools would exceed the limit. These compounds are now in the blood of virtually every person on Earth. They have been found in polar bears, in rainwater in Tibet, in the deepest ocean trenches.

In two thousand twenty-three, researchers tested rainwater in Tibet — the roof of the world, thousands of miles from any factory — and found PFAS levels exceeding EPA safety thresholds. These molecules are so stable, so unwilling to break down, that they have cycled through the atmosphere and fallen back to Earth in the most remote places on the planet. Polar bears carry them. Deep-sea fish carry them. Every living thing with a bloodstream now carries a trace of the chemical that Roy Plunkett scraped out of a gas cylinder in nineteen thirty-eight. The carbon-fluorine bond that made his discovery possible — the strongest bond in organic chemistry — is the reason it will be here long after every product it ever enabled has turned to dust. Stay informed, stay curious, and we'll see you tomorrow.