Potassium Perfluorooctane Sulfonate (PFOS)

Perfluorooctane Sulfonate (PFOS) is a synthetic compound and is part of a group known as Per- and Polyfluoroalkyl Substances (PFAS). PFOS is known for its chemical stability and ability to repel water and oils, which made it a popular choice in a variety of industrial and consumer products.

PFOS has been used in a range of household and consumer products, including water-repellent fabrics, non-stick pans, and fire-fighting foams. In cosmetics, PFOS could be used for its water and grease repellent properties, although its use has been phased out due to health and environmental concerns.

There isn't a large body of evidence on PFOS causing skin sensitivities or allergies. However, due to its persistent and bioaccumulative nature, it poses other significant health risks which might indirectly affect skin health.

PFOS is known to be a persistent, bioaccumulative, and toxic substance. It has been associated with a variety of adverse health outcomes in humans, including liver damage, cholesterol changes, immune system effects, and potential developmental issues in children and fetuses.

In California, according to Assembly Bill No. 496 (Chapter 441), PFOS is listed as one of the banned ingredients in cosmetic products effective January 1, 2025. This prohibition covers the manufacturing, selling, delivering, holding, or offering for sale of any cosmetic products containing PFOS among other specified ingredients. The ban reflects the growing understanding of the serious health and environmental risks posed by PFOS and similar compounds.

Given the substantial health and environmental risks associated with PFOS, its use in cosmetics and household products has faced regulatory bans in places like California. Consumers, particularly those with sensitive skin or health conditions, are advised to exercise caution and avoid products containing PFOS or its compounds.