Hydrochlorofluorocarbons (HCFCs) are a group of chemical compounds used primarily as refrigerants, solvents, and foam-blowing agents. They were developed as a less harmful alternative to chlorofluorocarbons (CFCs), which are known to deplete the ozone layer. HCFCs contain hydrogen, chlorine, fluorine, and carbon, making them less stable and less damaging to the ozone compared to CFCs. Despite being an improvement over CFCs, HCFCs still contribute to ozone depletion and have a global warming potential. As a result, international agreements like the Montreal Protocol aim to phase out their use. Many countries are transitioning to more environmentally friendly alternatives, such as hydrofluorocarbons (HFCs) and natural refrigerants.