• R22

    Industrial Difluorochloromethane (R22)

    CAS No.: 75-45-6 UN No.: 1018 CLASS No.: 2.2 Molecular formula: CHClF₂

    It is used as a refrigerant and pesticide spray propellant, and also as a raw material for fire extinguishing agents and fluororesins.

  • R22

    R22 (Chlorodifluoromethane), also known as HCFC-22, is a hydrochlorofluorocarbon (HCFC) refrigerant with CAS number 75-45-6. It has been widely used as a refrigerant in various air conditioning, refrigeration, and heat pump systems due to its favorable thermodynamic properties and non-flammability.

  • Applications

    Residential Air Conditioning

    Widely used in split-system and packaged air conditioners for homes and small buildings manufactured before 2010.

    Commercial HVAC Systems

    Applied in rooftop units, chillers, and commercial air conditioning systems for medium to large buildings.

    Transport Refrigeration

    Used in refrigerated trucks, trailers, and shipping containers for food and pharmaceutical transport.

    Industrial Process Cooling

    Employed in industrial chillers, cold storage facilities, and specialized process cooling applications.

    Chemical Feedstock

    Serves as a precursor in the production of fluoropolymers like PTFE (Teflon) and other fluorinated compounds.

    Heat Pump Systems

    Utilized in both air-source and ground-source heat pumps for heating and cooling applications.

  • Physical & Chemical Properties

    Thermodynamic Properties

    Boiling Point: -40.7°C (-41.3°F) at 1 atm

    Freezing Point: -157.4°C (-251.3°F)

    Critical Temperature: 96.0°C (204.8°F)

    Critical Pressure: 4.99 MPa (49.2 atm)

    Latent Heat of Vaporization: 233.9 kJ/kg at boiling point

    Safety & Handling Properties

    Flammability: Non-flammable

    Autoignition Temperature: Not applicable (non-flammable)

    Exposure Limits (OSHA PEL): 1000 ppm (8-hour TWA)

    Vapor Density: 3.0 (air = 1)

    Solubility in Water: 0.3% by weight at 25°C

    Environmental Properties

    Ozone Depletion Potential (ODP): 0.055 (relative to CFC-11 = 1)

    Global Warming Potential (GWP): 1,810 (100-year, CO₂ = 1)

    Atmospheric Lifetime: 11.9 years

    Hydroxyl Reactivity: 0.02 (relative to methane)

  • Packaging, Storage & Transportation

    Cylinder Sizes

    Available in various cylinder sizes: 10 lb, 25 lb, 30 lb, and 50 lb disposable cylinders. Also available in 100 lb, 500 lb, and 1,000 lb recovery cylinders for reclaimed R22.

    Bulk Containers

    For large-scale users: 1-ton cylinders and ISO tank containers for industrial applications and reclamation facilities.

    Storage Conditions

    Store in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Keep away from open flames and ignition sources. Cylinder temperature should not exceed 52°C (125°F).

    Transportation

    Classified as UN 1018, Chlorodifluoromethane (R22). Transport as a non-flammable gas. Cylinders must be secured upright during transport with valve protection caps in place.

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