• R32

    Industrial Difluoromethane (R32)

    CAS No.: 75-10-5 UN No.: 3252 CLASS No.: 2.1 Molecular formula: CH₂F₂

    It is mainly used as a refrigerant, a substitute for the low-temperature refrigerant R-502, or formulated into blended refrigerants with HFC-134a and HFC-152a respectively to replace HCFC-22.

  • R32

    R32 (Difluoromethane, CAS No. 75-10-5) is a hydrofluorocarbon (HFC) refrigerant with a single component, zero ozone depletion potential (ODP), and significantly lower global warming potential (GWP) compared to traditional refrigerants like R410A. As an emerging alternative in air conditioning applications, R32 offers improved energy efficiency and environmental performance

  • Applications

    Residential Air Conditioning

    Split-type and multi-split air conditioners

    Commercial AC Systems

    Packaged air conditioners and VRF systems

    Heat Pumps

    Air-to-water and air-to-air heat pumps

    Refrigeration

    Commercial refrigeration equipment

    Retrofit Applications

    Retrofitting R22 and R410A systems

    Low-GWP Solutions

    Compliance with environmental regulations

  • Physical & Chemical Properties

    Physical Properties

    Molecular Weight: 52.02 g/mol

    Boiling Point: (at 1 atm)-51.7 °C (-61.1 °F)

    Freezing Point: -136.8 °C (-214.2 °F)

    Critical Temperature: 78.1 °C (172.6 °F)

    Critical Pressure: 5.78 MPa (838 psia)

    Critical Density: 424 kg/m³

    Liquid Density (at 25°C): ~950 kg/m³

    Vapor Density (air=1): 1.8 (heavier than air)

    Specific Heat (Liquid, 25°C): ~1.57 kJ/(kg·K)

    Specific Heat (Vapor, 25°C): ~0.83 kJ/(kg·K)

    Thermal Conductivity: Higher than R410A, improving heat exchanger efficiency.

    Viscosity: Lower than R410A, reducing pressure drop in systems.

    Chemical & Safety Properties

    Flammability: Class A2L. Mildly flammable. It has a low burning velocity and a high Lower Flammability Limit (LFL), making it harder to ignite and sustain a flame compared to hydrocarbons.

    Lower Flammability Limit (LFL): 14.4% by volume in air.

    Upper Flammability Limit (UFL): 29.3% by volume in air.

    Auto-Ignition Temperature: 648 °C (1198 °F)

    ODP (Ozone Depletion Potential): 0 – Does not deplete the ozone layer.

    GWP (Global Warming Potential): 675 (IPCC AR5, 100-yr). This is about 1/3 of R410A's GWP (~2088).

    Atmospheric Lifetime: ~5.2 years (much shorter than R410A).

    Toxicity: Class A (Low Toxicity). However, at high concentrations, it can act as a simple asphyxiant and, like all refrigerants, decompose into toxic fumes (HF, carbonyl fluoride) if exposed to an open flame or extreme heat.

    Thermodynamic & Performance

    High Volumetric Cooling Capacity: Approximately 1.5 times greater than R410A. This means smaller displacement compressors can be used for the same cooling effect.

    C.O.P. (Coefficient of Performance): Similar to or slightly higher than R410A, offering good energy efficiency.

    Glide: Near Azeotropic (~0.5 K). It behaves almost like a single-component refrigerant, simplifying system design and service.

    Discharge Temperature: Higher than R410A, which requires specific compressor design considerations for reliability.

  • Packaging, Storage & Transportation

    Cylinder Sizes

    Available in 10 lb, 25 lb, 30 lb, 50 lb disposable cylinders. Also offered in 100 lb, 500 lb, 1,000 lb recovery cylinders for reclaimed R32.

    Bulk Containers

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

    Storage Conditions

    Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, open flames, and ignition sources. Cylinder temperature must not exceed 52°C (125°F). Keep cylinders upright and secured, and avoid mixing with oxidizers or corrosive substances.

    Transportation

    Classified as UN 3252, Difluoromethane (R32), a Class 2.1 Flammable Gas. Transport using dedicated hazardous goods vehicles with fire-fighting equipment and anti-leakage measures. Secure cylinders upright with valve protection caps in place; avoid high-temperature exposure and direct sunlight. Drivers and handlers must hold hazardous goods operation certifications.

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