1H,1H,2H,2H-perfluorooctanesulfonic acid, also known as PFOS, is a fluorosurfactant with a unique chemical structure. PFOS is a perfluorinated compound that is widely used in various industrial applications due to its surfactant properties. It is known for its high thermal stability and resistance to chemicals, making it valuable in the production of polymers, coatings, and electronics. PFOS is also used in specialty chemicals, cleaning agents, and certain medical applications, owing to its ability to reduce surface tension in liquids