Frogen^® 404A (HFC-404A) is a non-ozone depleting compound designed to serve as a long-term alternative to Frogen^® 502 (CFC-502) and Frogen^® 22 (HCFC-22) in low and medium temperature commercial refrigeration applications. Applications where Frogen^® 404A is a suitable retrofi t refrigerant include supermarket freezer cases, reach-in coolers, display cases, transport refrigeration and ice machines.

Frogen® 404A has been designed as a substitute to Frogen® 502, but it is not a drop-in replacement. Mineral oils and alkylbenzene lubricants, which have been used traditionally with Frogen® 502, are immiscible with Frogen® 404A. Service technicians should consult the original equipment manufacturer for the recommended lubricants.

Frogen® 404A is a blend. For this reason it is essential that systems be charged only with liquid from the cylinder, not vapour. Vapour-charging Frogen® 404A may result in the wrong refrigerant composition and could damage the system.