R-404A is a HFC blend of R-125,R-143a and R-134a and is used in low and medium temperature refrigeration such as supermarket freezers. It is a replacement for R-502. source


R-404A is a HFC blend of R-125,R-143a and R-134a and is used in low and medium temperature refrigeration such as supermarket freezers. It is a replacement for R-502. source