The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system.
Isomers are identified with lower cases (ex R 134a).
HFC refrigerant blends (i.e. mixtures of pure refrigerants), are numbered after the internationally accepted ASHRAE nomenclature.
Blends having the same pure components but with different compositions are identified with upper cases (ex R 404A). Refrigerants having the form R-4xxx are zeotropic blends of two or more refrigerants, while those with the form R-5xxx are azeotropes.
The numbers are in chronological order of the refrigerant’s approval by ASHRAE.
For the GWP of Refrigerants go to FS nr18: Selecting and Using GWP values for Refrigerants
|R-134a||Replace R-12 in most applications.||Good performance in medium temperature applications ; household refrigerators; car air conditioning systems; heat pumps; chillers; transport refrigeration; commercial cooling.|
|R-245fa||Replacement of R-123.||Chillers, heat transfer fluid.|
|R-404A||Near azeotropic refrigerant containing R-125, R-143a and R-134a (44/52/4% by weight).||Cold-storage cells; supermarket display cases; ice machines; replacement for R-502 in transport refrigeration; retrofit of existing R-502-installations R-407A Zeotropic refrigerant containing R-32, R-125 and R-134a (20/40/40 weight-%). Close replacement of R-22 in commercial refrigeration applications. Possible replacement for R-404A in supermarket chill and low temperature systems.|
|R-407C||Zeotropic refrigerant containing R-32, R-125 and R-134a (23/25/52 weight-%).||New air-conditioning units or replacement for R-22 in existing installations; heat-pumps; industrial and commercial cooling. R-407F Zeotropic refrigerant containing R-32, R-125 and R-134a (30/30/40 weight-%). Close replacement of R-22 in commercial refrigeration applications. Possible replacement for R-404A in supermarket medium and low temperature systems.|
|R-407F||Zeotropic refrigrant containing R-32, R-125 and R_134a (30/30/40 weight-%).||Close replacement of R-22 in commercial refrigeration applications. Possible replacement for R-404-A in supermarket medium and low temperature systems|
|R-410A||Near azeotropic refrigerant containing R-32 and R-125 (50/50 by weight).||Substitute for R-22 ; air-conditioning units; heat pumps; cold storage; industrial and commercial refrigeration; substitution of R-13B1 in low temperature application.|
|R-417B||Contains R-125, R-134a and Butane R-600 (79/18.25/2.75 weight-%).||R-22 substitute.|
|R-422A||Contains R-125, R-134a and Isobutane R-600a (85.1/11.5/3.4 weight-%).||R404A replacement very similar properties; R502 retrofit refrigerant.|
|R-422D||Contains R-125, R-134a and Isobutane R-600a (65.1/31.5/3.4 weight-%).||R-22 substitue.|
|R-427A||Contains R-32, R-125, R-134a and R-143a (15/25/50/10 weight-%).||R-22 subsitute.|
|R-507||Azeotropic refrigerant containing R-125 and R-143a (50/50% by weight).||Cold-storage cells; supermarket display cases; ice machines; replacement for R-502 in refrigerated transport; replacement for R-502; retrofit of existing R-502-installations.|
|R-1234yf||Low GPW replacement of R-134a||Mobile air-conditioning, plug in appliances.|
Organic compounds are numbered with the same system as Fluorocarbons.
Propane C3H8 (R-290)
Nb of C atoms is X = 3
Nb of H atoms is Y = 8
Nb of F atoms is Z = 0
Substract 90 from 380 = 290
Inorganic compounds shall be assigned a number in the 700 series, identification numbers are formed by adding the relative molecular mass of components to 700.
R717 = ammonia (molecular mass 17)
R718 = water (molecular mass 18)
R744 = CO2 (molecular mass 44)
The safety classification consists of two alphanumeric characters (e.g. A2); the capital letter corresponds to toxicity and the digit to flammability.
Refrigerants are divided into two groups according to toxicity:
Refrigerants are divided into three groups according to flammability:
Mixtures, whether zeotropic or azeotropic, with flammability and/or toxicity characteristics which may change as the composition changes during fractionation, shall be assigned a safety group classification based on the worst case of fractionation.
R404A is classified A1
|Refrigerant Number||Name||Composition or chemical formula|