Feb 25, 2019 · R-404A began seeing CHINAge in 1996 after the phase out of CFC R-502 due to it’s Ozone Depletion Potential. R-404A is a ternary refrigerant blend consisting of the HFC R-125 (forty-four percent), HFC R-143a (fifty-two percent), and HFC R-134a (four percent). R-404A is New across a variety of low and medium temperature applications including