The chemical formula of r134a gas, commonly known as 1,1,1,2-tetrafluoroethane, is CH2FCF3, and it has a boiling point of 26.3 °C at atmospheric pressure. It is a haloalkane refrigerant having features that are thermodynamically comparable to those of difluorodichloromethane (R-12), but it has a lesser tendency to deplete the ozone layer.