• HFC-125/R125

    Pentafluoroethane (R125)

    CAS No.: 354-33-6 UN No.: 3220 CLASS No.: 2.2 Molecular formula: C₂HF₅

    It is mainly used as a refrigerant .

  • R125

    R125 (Pentafluoroethane), identified by CAS No. 354-33-6, is a hydrofluorocarbon (HFC) refrigerant with excellent thermodynamic properties. It is a colorless gas with a faint ethereal odor, commonly used as a component in refrigerant blends due to its non-flammability and zero ozone depletion potential (ODP).

  • Applications

    Refrigerant Blends

    Essential non-flammable component in R410A and R407 series blends, enabling their safe use in residential/mobile AC, heat pumps, and commercial refrigeration.

    Fire Suppression

    Key agent in clean fire suppression systems (e.g., FM-200).

    System Integration

    Used across the listed HVAC&R applications (AC, MAC, heat pumps, industrial refrigeration).

    Transition Solution

    Critical for retrofitting older CFC/HCFC systems.

    Specialty Use

    Serves as an aerosol propellant in niche applications.

  • Physical & Chemical Properties

    Basic & Physical Properties

    Molecular Weight: 120.02 g/mol

    Boiling Point (1 atm): -48.1°C(-54.6°F)

    Freezing Point: -103°C (-153°F)

    Critical Temperature: 66.0°C(150.8°F)

    Critical Pressure: 3.62 MPa (525 psia)

    Liquid Density (25°C): ~1,200 kg/m³

    Vapor Density (air=1): 4.1

    Specific Heat (Liquid, 25°C): ~1.30 kJ/(kg·K)

    Vapor Thermal Conductivity: Low

    Environmental & Safety Properties

    Flammability: Class A1 - Non-flammable (Key differentiator)

    Flammability Limits: Non-flammable under all practical conditions

    Auto-Ignition Temperature: Non-flammable

    ODP (Ozone Depletion): 0

    GWP (Global Warming): 3,170 (IPCC AR5) - Very High

    Atmospheric Lifetime: ~29 years

    Toxicity: Class A (Low toxicity; asphyxiant at high concentrations)

    Thermodynamic & Application Profile

    Primary Role: Fire suppression component in refrigerant blends. Its main value is being a non-flammable HFC with good thermodynamic properties.

    Capacity & Efficiency: Lower volumetric cooling capacity than R143a or R32, but provides stability.

    Glide: Used primarily in zeotropic blends.

  • Packaging, Storage & Transportation

    Packaging Options

    Cylinders: 10 kg, 20 kg, 50 kg disposable steel cylinders

    ISO Tanks: Bulk transport in 20-24 MT ISO containers

    Drums: 500 kg and 1000 kg returnable steel drums

    Storage Guidelines

    Storage Temperature: Below 52°C (125°F), preferably in cool, dry area

    Ventilation: Well-ventilated area, away from ignition sources

    Separation: Store away from oxidizing materials and combustible substances

    Cylinder Position: Store upright with valve protection caps in place

    Transportation

    UN Identification Number: UN 3220 (Pentafluoroethane or Refrigerant gas R125)

    Transport Hazard Class: Class 2.2 (Non-flammable, non-toxic gas)

    Proper Shipping Name: PENTAFLUOROETHANE or REFRIGERANT GAS R125

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