1,1,1,2-Tetrafluoroethane (data page)

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This page lists chemical and physical properties of 1,1,1,2-tetrafluoroethane.

Physical Properties HCF-134a
Boiling Point at 1 atm (101.3 kPa or 1.013 bar) –15.34 °F (–26.3 °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 (77 °F) 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 (77 °F) 0.339 kcal/kg·K or Btu/(lb) (°F)
Heat Capacity (Vapor at Constant Pressure) at 25 °C (77 °F) and 1 atm (101.3 kPa or 1.013 bar) 0.204 kcal/kg·K or Btu/(lb) (°F)

Vapor Pressure at 25 °C (77 °F) kPa 666.1 bar 6.661
psia 96.61

Heat of Vaporization at Boiling Point kJ/kg 217.2 Btu/lb 93.4

Thermal Conductivity at 25 °C (77 °F) Liquid W/m·K 0.0824 Btu/hr·ft°F 0.0478

Vapor at 1 atm (101.3 kPa or 1.013 bar) W/m·K 0.0145 Btu/hr·ft°F 0.00836

Viscosity at 25 °C (77 °F) Liquid mPa·S (cP) 0.202 Vapor at 1 atm (101.3 kPa or 1.013 bar) mPa·S (cP) 0.012

Solubility of HFC-134a wt% 0.15 in Water at 25 °C (77 °F) and 1 atm (101.3 kPa or 1.013 bar)

Solubility of Water in HFC-134a wt% 0.11 at 25 °C (77 °F)

Flammability Limits in Air at 1 atm (101.3 kPa or 1.013 bar) vol % None

Autoignition Temperature °C 770 °F 1,418

Ozone Depletion Potential (ODP) — 0

Halocarbon Global Warming Potential (HGWP) — 0.28 (For CFC-11, HGWP = 1)

Global Warming Potential (GWP) — 1,200 (100 yr ITH, for CO2, GWP = 1)

TSCA Inventory Status — Reported/Included

Toxicity AEL* (8- and 12-hr TWA) ppm (v/v) 1,000

  • AEL (Acceptable Exposure Limit) is an airborne inhalation exposure limit established by DuPont that specifies time-weighted

average concentrations to which nearly all workers may be repeatedly exposed without adverse effects. Note: kPa is absolute pressure.

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