Examples (IMAGE) Universiteit van Amsterdam Caption Typical examples of active pharmaceutical ingredients containing heteroatom–CF3 fragments. Although such compounds themselves are formally in the family of polyfluorinated alkyl substances (PFAS), they hardly have issues of (un)degradability and environmental persistence that are typical of PFAS. Credit UvA, HIMS Usage Restrictions Free to use in the context of this study License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.