Is r-12 and 134-a freon the same?

R-12 and R-134a are not the same; they are different types of refrigerants. R-12, also known as dichlorodifluoromethane, is a chlorofluorocarbon (CFC) that was commonly used in refrigeration and air conditioning systems but is now banned due to its ozone-depleting properties. R-134a, or tetrafluoroethane, is a hydrofluorocarbon (HFC) that was introduced as a more environmentally friendly alternative to R-12. While they can serve similar purposes, they have different chemical compositions and properties, requiring different systems and handling practices.