trans-1,3,3,3-Tetrafluoropropene is a hydrofluoroolefin. It was developed as a "fourth generation" refrigerant to replace fluids such as R-134a, as a blowing agent for foam and aerosol applications, and in air horns and gas dusters. From Wikipedia
The CHMP’s positive opinion sets the stage for final EU Commission approval to replace high-global-warming-potential propellant with Honeywell’s lower-carbon alternative throughout AstraZeneca’s regional supply
