WHAT ARE PFAS CHEMICALS?
Per and polyfluoroalkyl substances (PFAS) are a class of complex chemicals used for consumer goods worldwide for the last 70 years.
PFAS were accidentally invented in 1938 by DuPont chemist Roy J. Plunkett while he was experimenting with refrigerant gases. Plunkett discovered polytetrafluoroethylene (PTFE), the first compound in the family of perfluorinated chemicals, which was later commercialised as Teflon. This discovery led to the development of a wide range of PFAS chemicals in the following decades.
PFAS were initially used in Teflon to make products such as non-stick pans, but have since been used in products like Scotch Guard, firefighting foams, stain resistant fabrics and carpets, and cosmetics.
PFAS owe their decades of popularity to their ability to resist heat, oil, stains, and water. Rather than being a specific chemical like chlorine or fluoride, PFAS is an umbrella term for a growing list of man-made substances.
Other acronyms are used to refer to specific groups within the PFAS class of chemicals:
- PFOS – Perfluorooctanesulfonic acid
Found in personal care products like shampoo and cosmetics. - PFOA – Perfluorooctanoic acid
Found in nonstick cookware, firefighting foam, and industrial waste. - PFHxS – Perfluorohexanesulfonic acid
Used as a surfactant in industrial processes. Also found in stain-resistant fabrics and firefighting foam. - PFNA – Perfluorononanoic acid
Found in stain-resistant and grease-resistant coatings on furniture, carpets, and food packaging.
These PFAS compounds have been given the nickname “forever chemicals” because they take so long to break down in the environment – and in our bodies. Rather than being expelled through sweat and waste like other toxins, forever chemicals bio-accumulate (build up over time) in both animals and humans.
Poor management and corporate disclosure led to the leaching of PFAS chemicals into the water table and surrounding environments, primarily through aqueous film-forming foams (fire fighting foams used from the 1970s to the mid-2000s), contaminating agricultural areas and water providers.
Another problem with forever chemicals is that they do not break down in the environment and can travel for long distances through water and air. The adverse effects of certain forever chemicals have been known for decades, while other PFAS compounds are still being studied and monitored to help us understand their impact on our bodies. Studies released in 2000 concluded that 95% of the planet’s water was contaminated with PFAS.
Despite national health concerns, 3M continues to use and make PFAS chemicals. The company announced its exit from per and polyfluoroalkyl substances (PFAS) manufacturing and will work to discontinue using PFAS across its product portfolio by the end of 2025.
WHAT PRODUCTS CONTAIN PFAS?
Where can you find PFAS compounds?
According to 3M’s website:
PFAS are used in everyday applications to promote durability, water resistance, and many other qualities. They are found in many important parts of modern life, including:
- Consumer goods, including non-stick cookware, food packaging, cosmetics, and clothing
- Medical technologies and devices, like catheters, stents, and needles, as well as transdermal patches that are used for medicine delivery
- Medicines and pharmaceuticals, including life-saving therapeutics that treat COVID-19, as well as common prescription medicines that treat conditions like anxiety or depression
- Automobiles, including electric and conventional vehicles, to help protect fuel lines, seals, and batteries
- Electronics, such as semiconductors and batteries, which are vital for everything from smart phones and wearable fitness trackers to national security technologies
- Aerospace, to help allow for interference-free communication from the cockpit to the wings, tail, and other equipment
- Advanced communications networks, including WiFi and cellular data networks
- Sustainable and renewable energy, including solar panels, windmills, and fuel cells
Other than potentially in my food and water, where else in my home may PFAS levels or exposure occur?
- Water-wicking materials for raincoats, umbrellas, jackets, water-resistant textiles, activewear and tents.
- Homewares (e.g. food containers, greaseproof paper, kitchen utensils and cookware, etc.), photographs, and paper coatings.
- Personal care items, including shampoos, toothbrushes, toothpaste, nails, and lashes.
- Stainproof coatings for upholstery, vehicles, and carpeting.
- Firefighting foams and fire/oil-resistant clothing