Here are the key aspects:
Chemical Structure
- Molecular Formula:Blend of :
- R32 (CH₂F₂) – 23%
- R125 (C₂HF₅) – 25%
- R134a (C₂H₂F₄) – 52%
- Molecular Weight: 86.2 g/mol
Physical Properties
- Appearance: Colorless gas
- Odor: Faint enther-like odor
- Boiling Point: -43.6°C (bubble point) to -36.6°C (dew point)
- Melting Point: Not applicable
- Density: 1.12 g/cm³ (liquid phase at 20°C)
- Vapor Density: 3.3 (relative to air)
- Critical Temperature:87.3°C
- Critical Pressure:4.63 MPa (46.3 bar)
- Temperature Glide:7°C
Chemical Properties
- Reactivity:R407C is chemically stable under normal conditions. Avoid contact with open flames, hot surfaces, or oxidizing materials. Thermal decomposition may produce toxic and corrosive gases, such as hydrogen fluoride (HF).
- Flammability:Classified as non-flammable (ASHRAE A1). Will not ignite under standard conditions.
- Solubility:Slightly soluble in water; highly soluble in organic solvents.
Uses
-
Residential and commercial air conditioning
-
Heat pumps
-
Medium-temperature refrigeration
-
Suitable for new equipment, not ideal for retrofitting due to different pressure and oil requirements.
- Note: Due to its temperature glide, R407C systems require proper refrigerant charging in the liquid phase and accurate superheat/subcooling control.
Safety and Handling
- Health Effects: Inhalation of high concentrations can cause respiratory irritation, dizziness, and headaches. Long-term exposure may have more severe effects on the liver and kidneys
- Handling Precautions: Use in well-ventilated areas. Avoid direct contact with skin and eyes. Use personal protective equipment (PPE) as necessary.
- Storage: Store in a cool, dry place away from heat sources and incompatible substances.
Environmental Impact
- Ozone Depletion Potential (ODP):0.0
- Global Warming Potential (GWP):1800
Summary
R407C is a non-ozone-depleting, high-efficiency HFC refrigerant blend, developed to replace R22 in air conditioning and heat pump systems. While offering comparable performance, it has a temperature glide and must be carefully charged and serviced. With a moderate GWP, it remains in use but is being gradually phased down in favor of newer, climate-friendly alternatives.
