C2H5F, also known as ethyl fluoride, is a chemical compound consisting of two carbon atoms, five hydrogen atoms, and one fluorine atom. It is classified as a haloalkane, which means it contains a halogen atom (in this case, fluorine) attached to an alkane structure. Ethyl fluoride is a colorless gas at room temperature and is used in various applications, including as a refrigerant and in organic synthesis. The compound has a molecular weight of approximately 66.05 g/mol. Ethyl fluoride is flammable and should be handled with care. Its properties make it useful in the production of other chemicals and in the pharmaceutical industry, where it can serve as an intermediate in the synthesis of various compounds.