These are precursors or degradation products for a lot more than refrigerants and propellants. - Any nonstick or stain resistant coating (scotch guard /Teflon)

These are precursors or degradation products for a lot more than refrigerants and propellants. - Any nonstick or stain resistant coating (scotch guard /Teflon) - Chemically inert Polymers for fixtures in chemical reactors (more PTFE variations)