Organic fluorides have very important applications in the pharmaceutical industry. About 15-20% of new drugs on the market each year are organic fluorine compounds. In fluorine-containing drug molecules, the fluorine content is usually relatively low, and each introduced fluorine atom or fluorine-containing group has its specific purpose.

Freon is a volatile liquid or colorless gas at room temperature, tasteless or slightly smelly, non-toxic or low-toxic, and chemically stable. Freon is widely used as refrigerant, foaming agent, cleaning agent, and widely used in electrical appliances such as air conditioners, foam plastics, daily chemicals, automobiles, fire-fighting equipment and other fields.

Chlorofluorocarbons

Chlorofluorocarbons, referred to as CFCs, mainly include R11, R12, R13, R14, R15, R500, R502, etc. These products have a damaging effect on the ozone layer and are listed as a class of controlled substances by the Montreal Protocol.

Freon belongs to halogenated hydrocarbons, the general formula of halogenated hydrocarbon refrigerants is CmHnFxClyBrz, and the numbering rule of halogenated element derivatives of alkanes is R(m-1)(n+1)(x)B(z ), if there is no Br, the item B(z) will not appear in the serial number. For isomers, English letters are added to distinguish them.