C8F17

C8F17 refers to a perfluorooctyl group, which is a functional group consisting of a chain of eight carbon atoms where all hydrogen atoms have been replaced by fluorine atoms. This structure is often represented as CF3(CF2)6CF2-. The perfluorooctyl group is a key component of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), and their related substances, which are part of the larger class of per- and polyfluoroalkyl substances (PFAS).

Due to the strong carbon-fluorine bonds, compounds containing the C8F17 group exhibit exceptional chemical and thermal stability, as well as repellent properties against water and oil. These characteristics made them highly useful in a wide range of industrial and consumer applications, including non-stick cookware, stain-resistant fabrics, firefighting foams, and food packaging. However, the persistence of these substances in the environment and their potential health effects have led to increasing concern and regulatory action worldwide. The C8F17 moiety contributes to the bioaccumulation and long environmental half-life of the compounds in which it is found.