| Physical Properties |
HFC-134a |
| Boiling Point at 1 atm |
−15.34 °F (−26.30 °C) |
| Freezing Point |
−153.9 °F (−103.3 °C) |
| Critical Temperature |
213.9 °F (101.1 °C) |
| Critical Pressure |
4060 kPa (588.9 lb/in2 abs) |
| Critical Volume |
1.94 × 10−3 m3/kg (0.031 ft3/lb) |
| Critical Density |
515.3 kg/m3 (32.17 lb/ft3) |
| Density (Liquid) at 25 °C |
1206 kg/m3 (75.28 lb/ft3) |
| Density (Saturated Vapor) at boiling point |
5.25 kg/m3 (0.328 lb/ft3) |
| Heat Capacity (Liquid) at 25 °C |
0.339 kcal/kg·K |
| Heat Capacity (Vapor at Constant Pressure) at 25 °C and 1 atm |
0.204 kcal/kg·K |
| Vapor Pressure at 25 °C |
666.1 kPa |
| Heat of Vaporization at Boiling Point |
217.2 kJ/kg (93.4 Btu/lb) |
| Thermal Conductivity at 25 °C, liquid |
0.0824 W/m·K (0.0478 Btu/hr·ft°F) |
| Thermal Conductivity at 25 °C vapor at 1 atm |
0.0145 W/m·K (0.00836 Btu/hr·ft°F) |
| Viscosity at 25 °C, liquid |
0.202 mPa·S (cP) |
| Viscosity at 25 °C, vapor at 1 atm |
0.012 mPa·S (cP) |
| Solubility in water at 25 °C and 1 atm |
0.15% by weight |
| Solubility of water in HFC-134a at 25 °C |
0.11% by weight |
| Flammability Limits in Air at 1 atm |
None |
| Autoignition temperature |
770 °C (1,420 °F) |
| Ozone depletion potential |
0 |
Halocarbon Global Warming Potential (HGWP)
(For CFC-11, HGWP = 1) |
0.28 |
Global Warming Potential (GWP)
(100 yr ITH. For CO2, GWP = 1) |
1,200 |
| Toxicity Acceptable Exposure Limit* (8- and 12-hr time-weighted average) |
1,000 ppm (v/v) |