PFAS vs. PFOS

PFAS (per- and polyfluoroalkyl substances) and PFOS (perfluorooctane sulfonate) are both types of synthetic chemicals that have been widely used in a variety of industrial and consumer applications.

PFAS is a broad term used to describe a family of chemicals that have strong carbon-fluorine bonds. These chemicals have unique properties that make them useful in a wide range of applications, including firefighting foams, non-stick coatings, and waterproof fabrics. PFOS is a type of PFAS that was commonly used in firefighting foams and as a surfactant in a variety of industrial applications.

While both PFAS and PFOS are highly persistent in the environment and can accumulate in the human body, PFOS is considered to be one of the most toxic PFAS compounds. Studies have linked PFOS exposure to a range of adverse health effects, including developmental and reproductive toxicity, immunotoxicity, and cancer. As a result, many countries have phased out the use of PFOS and some other PFAS compounds, although they are still present in many products and the environment.

Overall, while PFAS and PFOS are related chemicals, PFOS is considered to be a more concerning compound due to its higher toxicity and persistence in the environment.