C4F8, or perfluorocyclobutane, is a colorless, odorless gas that belongs to the family of perfluorocarbons. It is primarily used in the semiconductor industry for etching and cleaning processes due to its excellent chemical stability and low toxicity. In addition to its industrial applications, C4F8 is also studied for its potential use in medical imaging and as a tracer gas in environmental studies. Its unique properties make it valuable in various scientific and technological fields, although its greenhouse gas potential raises environmental concerns.