R-407C · R-32/R-125/R-134a
R-407C is a blend of R-32, R-125 and R-134a (23/25/52 by weight); this page gives its bubble- and dew-point pressures and saturated liquid and vapour densities from -40 to 60 °C.
Bubble- and dew-point pressures and saturated liquid and vapour densities are computed from CoolProp==6.6.0 - multi-fluid Helmholtz-energy mixture model for the predefined blend R407C and tabulated over -40–60 °C.
- Also known as
- R407C, HFC blend R-32/R-125/R-134a, R-407c
- Component CAS
- 75-10-5 (R-32), 354-33-6 (R-125), 811-97-2 (R-134a)
- Tabulated range
- -40–60 °C · saturation line
- Refrigerant
- R-407C
- Composition
- R-32/R-125/R-134a (23/25/52 wt%)
- GWP (100-yr)
- 1774
- ASHRAE 34 class
- A1
- Blend components
- R-32 / R-125 / R-134a (23 / 25 / 52 wt%)
- Glide at 1 atm
- 7K
GWP 1774 — Calculated 100-year GWP, mass-weighted from the AR4 component values (basis attributed by the U.S. EPA Technology Transitions GWP Reference Table). U.S. EPA - Technology Transitions GWP Reference Table. U.S. Environmental Protection Agency, Technology Transitions GWP Reference Table: R-407C 100-year GWP = 1,774 (table reference: Calculated). https://www.epa.gov/climate-hfcs-reduction/technology-transitions-gwp-reference-table
ASHRAE 34 A1 — ANSI/ASHRAE Standard 34 safety group classification. ANSI/ASHRAE Standard 34 - Designation and Safety Classification of Refrigerants. ANSI/ASHRAE Standard 34-2022, Designation and Safety Classification of Refrigerants: R-407C assigned safety group A1.
- Bubble pressure
- 11.902bar
- Bubble gauge
- 157.9psig
- Dew pressure
- 10.200bar
- Dew gauge
- 133.2psig
- Liquid density
- 1137.5kg/m³
- Vapour density
- 43.77kg/m³
Read the saturation lines either way
Set a temperature to read its bubble- and dew-point pressures and densities, or set a pressure to read the saturation temperature on the dew line. Every number is interpolated from the committed table below and clamped to the validated -40–60 °C range — nothing is computed from a property model in your browser.
Values are interpolated along the tabulated saturation lines below — both the temperature and the pressure stay within the validated -40–60 °C range and are never extrapolated. For this blend, the temperature direction reads both the bubble- and dew-point pressures; the pressure direction inverts the dew-point line.
- Saturation temp
- 25.0 °C
- Bubble pressure
- 11.902 bar
- Dew pressure
- 10.200 bar
- Bubble gauge
- 157.9 psig
- Dew gauge
- 133.2 psig
- Liquid density
- 1137.5 kg/m³
- Vapour density
- 43.77 kg/m³
Every tabulated point
Bubble- and dew-point pressures (absolute, shown in kPa and bar, with the gauge value in psig at standard atmosphere) and the bubble-point liquid and dew-point vapour densities at each temperature. A negative psig is a partial vacuum below one atmosphere.
| T °C | Bubble | Dew | ρ liq kg/m³ | ρ vap kg/m³ | ||||
|---|---|---|---|---|---|---|---|---|
| kPa | bar | psig | kPa | bar | psig | |||
| -40 | 120.3 | 1.202 | 2.7 | 85.7 | 0.857 | −2.3 | 1369.5 | 3.95 |
| -35 | 150.8 | 1.508 | 7.2 | 109.7 | 1.097 | 1.2 | 1353.8 | 4.99 |
| -30 | 187.1 | 1.871 | 12.4 | 138.7 | 1.387 | 5.4 | 1338.0 | 6.23 |
| -25 | 229.9 | 2.299 | 18.7 | 173.5 | 1.735 | 10.5 | 1321.9 | 7.70 |
| -20 | 279.9 | 2.799 | 25.9 | 214.7 | 2.147 | 16.4 | 1305.5 | 9.43 |
| -15 | 337.9 | 3.379 | 34.3 | 263.2 | 2.632 | 23.5 | 1288.7 | 11.46 |
| -10 | 404.7 | 4.047 | 44.0 | 319.8 | 3.198 | 31.7 | 1271.6 | 13.81 |
| -5 | 481.1 | 4.811 | 55.1 | 385.3 | 3.853 | 41.2 | 1254.1 | 16.55 |
| 0 | 567.9 | 5.679 | 67.7 | 460.7 | 4.607 | 52.1 | 1236.2 | 19.69 |
| 5 | 666.0 | 6.660 | 81.9 | 546.9 | 5.469 | 64.6 | 1217.7 | 23.31 |
| 10 | 776.4 | 7.764 | 97.9 | 644.9 | 6.449 | 78.8 | 1198.7 | 27.45 |
| 15 | 899.9 | 8.999 | 115.8 | 755.6 | 7.556 | 94.9 | 1179.1 | 32.18 |
| 20 | 1037.5 | 10.375 | 135.8 | 880.3 | 8.803 | 113.0 | 1158.7 | 37.59 |
| 25 | 1190.2 | 11.902 | 157.9 | 1020.0 | 10.200 | 133.2 | 1137.5 | 43.77 |
| 30 | 1359.0 | 13.590 | 182.4 | 1175.8 | 11.758 | 155.8 | 1115.4 | 50.82 |
| 35 | 1544.8 | 15.448 | 209.4 | 1349.1 | 13.491 | 181.0 | 1092.2 | 58.88 |
| 40 | 1748.9 | 17.489 | 239.0 | 1541.2 | 15.412 | 208.8 | 1067.8 | 68.13 |
| 45 | 1972.2 | 19.722 | 271.3 | 1753.5 | 17.535 | 239.6 | 1041.8 | 78.78 |
| 50 | 2215.9 | 22.159 | 306.7 | 1987.6 | 19.876 | 273.6 | 1014.0 | 91.13 |
| 55 | 2481.2 | 24.812 | 345.2 | 2245.3 | 22.453 | 311.0 | 984.0 | 105.56 |
| 60 | 2769.4 | 27.694 | 387.0 | 2528.6 | 25.286 | 352.0 | 951.1 | 122.66 |
R-407C bubble and dew pressure at a glance
At -20 °C, R-407C bubble pressure is about 2.80 bar (280 kPa; 25.9 psig); dew pressure is 2.15 bar (16.4 psig). At 0 °C, R-407C bubble pressure is about 5.68 bar (568 kPa; 67.7 psig); dew pressure is 4.61 bar (52.1 psig). At 25 °C, R-407C bubble pressure is about 11.90 bar (1190 kPa; 157.9 psig); dew pressure is 10.20 bar (133.2 psig). At 40 °C, R-407C bubble pressure is about 17.49 bar (1749 kPa; 239.0 psig); dew pressure is 15.41 bar (208.8 psig).
Where the numbers come from
Every value on this page is computed by a deterministic equation of state — none is entered by hand. The generating method and the references it is checked against:
- ▸Arkema Forane 407C - Thermodynamic Properties (Saturation), SI (data generated with NIST REFPROP v9.0); blend bubble/dew pressures and densities
- ▸CoolProp 6.6.0 - multi-fluid Helmholtz-energy mixture model for the predefined blend R407C
- ▸U.S. EPA - Technology Transitions GWP Reference Table (100-year GWP, calculated from AR4 component values)
- ▸ANSI/ASHRAE Standard 34-2022 - Designation and Safety Classification of Refrigerants
Model: CoolProp==6.6.0 - multi-fluid Helmholtz-energy mixture model for the predefined blend R407C · Generated 2026-06-07
The committed data file for this page is published as JSON on GitHub under CC BY 4.0.
Checked against cited values
NIST WebBook does not tabulate blends, so the equation of state is cross-checked against a named manufacturer/handbook saturation table. The page is published only because every check passes.
| Property / point | Bubble-point pressure · 25 °C |
| Cited reference value | 1190.3 kPa |
| Model computed | 1190.24 kPa |
| Error vs reference | 0.005% (tolerance 1.5%) |
Arkema Forane 407C - Thermodynamic Properties (Saturation), SI (REFPROP v9.0). Arkema, Forane 407C Thermodynamic Properties (Saturation) - SI (data generated with NIST REFPROP Database 23, v9.0), R-407C saturation table at 25 degC: bubble-point (liquid) pressure = 1190.3 kPa. https://www.arkema.com/files/live/sites/shared_arkema/files/downloads/fluorochemicals/forane-407c-thermodynamic-properties-si.pdf
| Property / point | Saturated liquid density · 25 °C |
| Cited reference value | 1137.5 kg/m3 |
| Model computed | 1137.53 kg/m3 |
| Error vs reference | 0.003% (tolerance 1.5%) |
Arkema Forane 407C - Thermodynamic Properties (Saturation), SI (REFPROP v9.0). Arkema, Forane 407C Thermodynamic Properties (Saturation) - SI (data generated with NIST REFPROP Database 23, v9.0), R-407C saturation table at 25 degC: bubble-point (liquid) density = 1137.5 kg/m3. https://www.arkema.com/files/live/sites/shared_arkema/files/downloads/fluorochemicals/forane-407c-thermodynamic-properties-si.pdf
Before you use these numbers
- ▸CoolProp multi-fluid Helmholtz-energy mixture model for the predefined blend R-407C (23/25/52 wt% R-32/R-125/R-134a). Saturation properties only, tabulated from -40 to +60 degC; superheated and single-phase data are out of scope for this page. R-407C is a zeotropic blend whose bubble-point and dew-point pressures differ materially at a given temperature. The critical point is 86.2 degC / 4631.7 kPa, well above the table top, so every tabulated state is sub-critical. Values are for preliminary design; verify against vendor data for critical service. Temperature glide at 1 atm (101.325 kPa), computed as the dew-point temperature minus the bubble-point temperature at constant pressure is 7.0 K.
- ▸Saturation properties only — these are two-phase (saturation-line) values; superheated and sub-cooled single-phase data are out of scope for this page. The critical point is 86.2 °C / 4631.7 kPa, above the tabulated range.
- ▸Values are tabulated only inside the -40–60 °C range shown; the equation of state is not extrapolated beyond it here.
- ▸Use for preliminary design; verify for critical service.
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