R407c Refrigerant Gas is a zeotropic blend of HFC-32 (23%), HFC-125 (25%), and HFC-134a (52%). It is commonly used in air conditioning and refrigeration systems as a replacement for R22. Below are its key specifications and technical properties:
Chemical Formula: CH₂F₂/CHF₂CF₃/CH₂FCF₃ (HFC-32/HFC-125/HFC-134a)
Molecular Weight: 86.2 g/mol
Boiling Point: -43.6°C (-46.5°F) at 1 atm
Critical Temperature: 86.2°C (187.2°F)
Critical Pressure: 4.63 MPa (671 psi)
Density (Liquid): ~1.15 g/cm³ at 25°C
Density (Vapor): ~4.4 kg/m³ at 25°C
Viscosity (Liquid): ~0.2 mPa·s at 25°C
Viscosity (Vapor): ~0.012 mPa·s at 25°C
Buoyancy: Heavier than air (vapor density ~3.0 relative to air)
Material Compatibility: Compatible with POE (Polyolester) oils, metals (copper, steel, aluminum), and elastomers (HNBR, EPDM). Avoid contact with PVC and natural rubber.
Grade: Industrial/Commercial Grade (99.5% purity or higher)
Common Cylinder Sizes: 10 kg, 20 kg, 50 kg, and disposable 13.6 kg (30 lb) cylinders.
ASHRAE Safety Classification: A1 (Non-flammable, low toxicity)
Global Warming Potential (GWP): 1,774 (100-year horizon)
Ozone Depletion Potential (ODP): 0
Autoignition Temperature: Non-flammable under standard conditions
Thermal Conductivity (Liquid): ~0.09 W/m·K at 25°C
Thermal Conductivity (Vapor): ~0.014 W/m·K at 25°C
Specific Heat Capacity (Liquid): ~1.5 kJ/kg·K at 25°C
Specific Heat Capacity (Vapor): ~0.9 kJ/kg·K at 25°C
