| No. | Working Fluid | Chemical formula | Molecular Mass (g/mol) | ASHRAE No. | Critical Temp. (˚C) | Critical Press. (bar) | Boiling point (˚C) | ASHRAE Safety | ODP | GWP (100yr) | dS/dT |
| 1 | Dichlorodifluoromethane | CCl2F2 | 120.91 | R-12 | 112 | 41.1 | -29.8 | A1 | 1 | 10890 |
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| 2 | Difluoromonochloromethane | CHClF2 | 86.47 | R-22 | 96.2 | 48.9 | −40.7 | A1 | 0.1 | 1810 | -1.3 |
| 3 | Difluoremethane | CH2F2 | 52.02 | R-32 | 78.3 | 57.8 | -51.7 | A2 | 0 | 580 | -4.3 |
| 4 | 2,2 -Dichloro-1.1.1-trifluoroethane | C2HCl2F3 | 152.93 | R-123 | 184 | 36.6 | 27.8 | B1 | 0 | 77 | 0.3 |
| 5 | 1-Chloro-1,2,2,2-tetrafluoroethane | C2HClF4 | 136.5 | R-124 | 123 | 36.3 | −12 | A1 | 0 | 609 | 0.3 |
| 6 | Pentafluoroethane | C2HF5 | 120.0 | R-125 | 66.2 | 36.2 | -48.5 | A1 | 0 | 2800 | -1.1 |
| 7 | 1,1,1,2-Tetrafluoroethane | CH2FCF3 | 102.03 | R-134a | 101 | 40.7 | -26.1 | A1 | 0 | 1300 | -0.4 |
| 8 | 1,1,1-Trifluoroethane | C2H3F3 | 84.04 | R-143a | 72.9 | 37.6 | -47.6 | A2 | 0 | 3900 | -1.5 |
| 9 | 1,1 difluoroethane | C2H4F2 | 66.05 | R-152a | 113 | 45.2 | -24.0 | A2 | 0 | 140 | -1.1 |
| 10 | 1,1,1,3,3-Pentafluoropropane | C3H3F5 | 134.05 | R-245fa | 154 | 36.5 | 15.1 | B1 | 0 | 950 | 0.2 |
| 11 | Propane | C3H8 | 44.10 | R-290 | 370 | 42.5 | -42.1 | A3 | 0 | <10 | -0.8 |
| 12 | Butane | C4H10 | 58.122 | R-600 | 152 | 37.9 | -0.6 | A3 | 0 | <10 | 1.0 |
| 13 | Isobutane | C4H10 | 58.12 | R-600a | 135 | 36.4 | -11.7 | A3 | 0 | <10 | 1.0 |
| 14 | Propylene | C3H6 | 42.08 | R-1270 | 92.6 | 46.6 | -47.6 | A3 | 0 | 0 | -1.8 |