Issue 2, 2024

Characterization and dermal bioaccessibility of residual- and listed PFAS ingredients in cosmetic products

Abstract

As a large group of chemicals with diverse properties, per- and polyfluoroalkyl substances (PFAS) have found extensive application throughout consumer products, including cosmetics. Little is known about the importance of dermal uptake as a human exposure pathway for PFAS. Here we investigate a suite of listed-ingredient and residual PFAS in cosmetic products, along with their dermal bioaccessibility using in vitro incubations with artificial sweat. Concentrations of volatile listed ingredients (including cyclic perfluorinated alkanes, perfluorinated ethers, and polyfluorinated silanes) in three products ranged from 876–1323 μg g−1, while polar listed ingredients (i.e., polyfluoroalkyl phosphate esters [PAPs]) in a single product occurred at up to 2427 μg g−1 (6 : 2/6 : 2 diPAP)). Residual perfluoroalkyl carboxylic acids (PFCAs) were also measured at concentrations ranging from 0.02–29 μg g−1. When listed ingredients were included, our targeted analysis accounted for up to 103% of the total fluorine, while highlighting ambiguous and/or incorrect International Nomenclature of Cosmetic Ingredient (INCI) names used in several products. Bioaccessibility experiments revealed that residual PFCAs readily partitioned to artificial sweat (bioaccessible fractions ranging from 43–76% for detectable substances) while listed ingredients (i.e., PAPs and neutral/volatile PFAS) displayed negligible partitioning. This work provides new insight into the occurrence of PFAS in cosmetic products, while furthering our understanding on their mechanisms of dermal uptake.

Graphical abstract: Characterization and dermal bioaccessibility of residual- and listed PFAS ingredients in cosmetic products

Supplementary files

Article information

Article type
Paper
Submitted
20 Oct 2023
Accepted
24 Dec 2023
First published
04 Jan 2024
This article is Open Access
Creative Commons BY-NC license

Environ. Sci.: Processes Impacts, 2024,26, 259-268

Characterization and dermal bioaccessibility of residual- and listed PFAS ingredients in cosmetic products

S. Namazkar, O. Ragnarsdottir, A. Josefsson, F. Branzell, S. Abel, M. Abou-Elwafa Abdallah, S. Harrad and J. P. Benskin, Environ. Sci.: Processes Impacts, 2024, 26, 259 DOI: 10.1039/D3EM00461A

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