Briton Refrigerant R404a

Briton Refrigerant R404a Gas

Briton Refrigerant R404a


Briton R404A Refrigerant Gas is an almost azeotropic mixture of HFC refrigerants, with zero ozone layer depletion, used in new refrigeration equipment at mid-range and low temperatures. It is also an indirect replacement (retrofit), in equipment that previously operated with R-502 and its HCFC replacements such as R-408A, DI-44, and HP80.

It is mainly used in new installations with mid-range and low refrigeration temperatures. The theoretical cooling capacity is 5% lower than R-502 at evaporation temperatures of -40ºC. The coefficient of performance (COP) is between 5 and 8% lower than R-502. As superheating increases, R-404A’s COP might become higher than that of R-502. In the case of R-502 retrofits and its HCFC replacements (R-408A, DI-44), 95% of the original mineral oil or alkylbenzene must be replaced by a polyolester oil, the dryer filter and expansion valve changed, rubber O-rings replaced with plastic ones and, occasionally, the size of the condenser must be increased. When it is used as a retrofit for R-22, the safety valves also need to be changed along with any other elements calibrated to R-22 pressures.


Download Briton Refrigerant R404a Gas Material Safety Data Sheet (MSDS).

Product InformationProduct SpecificationMaterial Safety Data Sheet (MSDS)
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General Information

R-404A is a pseudo-azeotropic mixed refrigerant composed of the three ingredients R-125, R-134a, and R-143a, and was developed as a substitute refrigerant for R-502 and R-22, used in commercial refrigerator equipment for low and medium temperature ranges.

Refrigerant TypeBlend
Typical LubricantPOE
SubstitutesR-502, HCFC-22
ContainsHFC-125 (44%), HFC-143a (52%), HFC-134a (4%)
NotesMost widely used low- and medium-temperature replacement.
Physical Properties

Physical Properties of Briton Refrigerant R404a (Pentafluoroethane, Trifluoroethane, Tetrafluoroethane)

Chemical Name Pentafluoroethane Trifluoroethane Tetrafluoroethane
Chemical NotationCF3CHF3, CF3CH3, CFcCH2F
Molecular Weight97.6
Boiling Point (°C)-46.2
Freezing Point (°C)Average -117.5
Critical Temperature (°C)72.2
Critical Pressure (bar)37.29
Liquid Density (kg/m³) 0°C1150.01
Specific Heat of Liquid @ Constant Pressure @ 25°C (kJ/(kg.K))1.5423
Specific Heat of Vapor @ Constant Pressure @ 25°C (kJ/(kg.K))1.2214
Vapour Density (kg/m³) 25°C3.99
ODPNon-ozone depleting
ATEL/ODL (kg/m³) 0.52
Practical Limit (kg/m³) 0.52
AIT (°C)728
Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)None
ANSIASHRAE Standard 36-1992 Safety Group ClassificationA1