Which type of refrigerant is commonly known for its ozone-depleting properties?

The refrigerant commonly known for its ozone-depleting properties is HCFCs (Hydrochlorofluorocarbons). This class of chemicals was introduced as a transitional substitute for CFCs (Chlorofluorocarbons), which were found to cause significant harm to the ozone layer. HCFCs still contain chlorine, which is the element primarily responsible for ozone depletion.

While HFCs (Hydrofluorocarbons) do not deplete the ozone layer, they are potent greenhouse gases and contribute to global warming. HFOs (Hydrofluoroolefins) are designed as more environmentally friendly alternatives and have a lower global warming potential, but they do not have ozone-depleting properties. CO2, while used in some refrigeration applications, is not a refrigerant in the traditional sense and does not harm the ozone layer. Thus, HCFCs are specifically recognized for their ozone-depleting characteristics, marking them differently from the other refrigerants listed.