Perfluorononanoic Acid (PFNA)

Perfluorononanoic Acid (PFNA), with the CAS number 375-95-1, is a type of perfluoroalkyl substance (PFAS), which are man-made chemicals that have been used in industry and consumer products worldwide since the 1950s. PFNA is characterized by its resistance to heat, water, and oil.

PFNA and other similar compounds are used in a variety of household and consumer products to make them more resistant to stains, grease, and water. In cosmetics, PFNA might be used for its ability to repel oil and water, potentially in products like foundation or other makeup to improve their consistency and wear. Moreover, they might also be used in the manufacturing process of cosmetic packaging.

There is limited data regarding the dermatological effects of PFNA. However, PFAS substances, in general, have been associated with skin irritation and potential allergic reactions. Consumers with sensitive skin may want to exercise caution and look for products labeled PFAS-free.

PFNA, like other PFAS, has been associated with various health risks when there's prolonged exposure. Some of these risks include developmental harm to fetuses, liver effects, immune effects, and potential links to cancer. Its environmental persistence is also a concern as PFNA can remain in the environment and in the human body for long periods of time.

In California, under Assembly Bill No. 496 (Chapter 441), Perfluorononanoic Acid (PFNA) is listed among the banned ingredients in cosmetic products, effective January 1, 2027. This prohibition extends to the manufacturing, selling, delivering, holding, or offering for sale of any cosmetic products that intentionally contain PFNA among other specified ingredients due to the associated health and environmental risks.

Given the potential health risks and the environmental persistence associated with PFNA, its usage in cosmetics and household products has been regulated in places like California. Consumers, especially those with sensitive skin, are advised to exercise caution and consider choosing products free from PFNA and other PFAS substances.