Solstice yf R1234yf Chemical Notation CF3CFCH2 2333tetrafluoroprop1ene Critical Temperature 947 C Critical Pressure 3382 bar Liquid Density at 0C 109191 kgm Safety Classification ANSIASHRAE 361992 A2L Relative Molar Mass 11404 gmol Vapor Density at 25C 3792 kgm Global Warming Potential GWP 1 Ozone Depletion Potential ODP Nonozone depleting REACH Status Approved ATELODL 047 kgm Practical Limit 0058 kgm Autoignition Temperature AIT 405 C Application Solstice yf is a near dropin replacement for R134A specifically designed for mobile air conditioning MAC systems and future small stationary applications Its low GWP makes it compliant with Fgas regulations providing an environmentally friendly alternative to traditional refrigerants