Here are the key aspects:
Chemical Structure
- Molecular Formula:Blend of:
- R125 (Pentafluoroethane, C₂HF₅) – 50%
- R143a (Trifluoroethane, C₂H₃F₃) – 50%
- Molecular Weight: 98.9 g/mol
Physical Properties
- Appearance:Colorless gas
- Odor:Faint, enthereal
- Boiling Point:-47.1°C
- Melting Point:Not applicable (mixture)
- Density: 1.04 g/cm³ (liquid phase at 20°C)
- Vapor Density: 3.6 (relative to air)
- Critical Temperature: 70.9°C
- Critical Pressure:3.73MPa(37.3 bar)
Chemical Properties
- Reactivity:Chemically stable under normal conditions. Can decompose at high temperatures to produce toxic gases like hydrogen fluoride (HF) and carbon oxides.
- Flammability:Classified as non-flammable (ASHRAE A1). However, decomposition gases are hazardous.
- Solubility:Slightly soluble in water. Readily soluble in organic solvents.
Uses
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Low- and medium-temperature commercial refrigeration
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Cold storage, transport refrigeration, and supermarket freezers
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Designed as a replacement for R502 and an alternative to R404A.
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):4000
Summary
R507A is a non-ozone-depleting, non-flammable, high-performance HFC blend suitable for modern commercial and industrial refrigeration systems. It offers consistent cooling with no glide, excellent performance, and safety. However, due to its high global warming potential, it is being phased down under climate regulations, with alternatives increasingly adopted.
