R407C Refrigerant Gas
R407C is a zeotropic A1 HFC blend of R32, R125 and R134a formulated to provide R22-like performance in selected air-conditioning, heat-pump and refrigeration applications.
Its meaningful temperature glide and lubricant requirements make correct charging and retrofit practice important; R407C should not be treated as a universal R22 drop-in.
Reference packaging includes 850 g, 2.7 kg, 5.6 kg and 11.3 kg formats. Confirm current specification and supply configuration for each order.
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Description
R407C Refrigerant Gas
R407C is a zeotropic HFC blend containing approximately 23% R32, 25% R125 and 52% R134a by mass. It is classified A1 and has zero ozone depletion potential.
The blend was developed to match important R22 operating characteristics in air conditioning, heat pumps and selected medium-temperature refrigeration. It remains one of the better-known R22-era retrofit and transition refrigerants.
Unlike a single-component refrigerant, R407C has meaningful temperature glide. Bubble/dew data, liquid charging, lubricant management and correct commissioning are therefore central to reliable service work.
Review the full R407C refrigerant profile and the R22 Replacement Guide before planning a retrofit.
Key R407C Refrigerant Properties
Core R407C data relevant to product sourcing, R22 retrofit research and blend service practice.
R407C Technical Specifications
R407C is a zeotropic blend, so exact supplier pressure-temperature data and bubble/dew references should be used for service calculations.
| Refrigerant Designation | R407C |
|---|---|
| Nominal Composition | R32 / R125 / R134a = 23 / 25 / 52 mass % |
| Refrigerant Type | Zeotropic HFC blend |
| Average Molecular Weight | ≈ 86.2 g/mol |
| Normal Boiling Reference | ≈ -43.9°C |
| Critical Temperature | ≈ 86.0°C |
| Critical Pressure | ≈ 46.3 bar |
| Ozone Depletion Potential (ODP) | 0 |
| 100-Year Global Warming Potential | 1,774 — EPA Technology Transitions reference |
| ASHRAE Safety Class | A1 |
| Transport Hazard Class | Class 2.2 |
R407C has temperature glide, so a single saturation-temperature assumption can produce incorrect superheat or subcooling analysis. Use the supplier’s R407C liquid/dew P-T data for service work.
Typical R407C Applications
R407C is best understood as an R22-era transition blend for specific equipment types, not as a universal refrigerant for every legacy system.
Air-Conditioning Retrofits
R407C is a well-established R22 retrofit route in selected residential and commercial AC systems when manufacturer and service requirements are met.
Heat Pumps
R407C has been used in heat-pump equipment and retrofit work designed around R22-like pressure and capacity characteristics.
Medium-Temperature Refrigeration
Selected direct-expansion refrigeration systems can use R407C within the approved compressor and equipment operating envelope.
Non-Flooded Chillers
R407C has been used in selected positive-displacement and non-flooded chiller applications.
Legacy HVAC Service
A large installed R407C base still requires correct blend charging, leak repair, recovery and refrigerant identification.
R22 Transition Projects
R407C may be evaluated where a project requires an A1 R22 retrofit route and POE/lubricant conversion can be managed.
For application context, see Air Conditioning Refrigerants and Heat Pump Refrigerants.
R407C Safety and Handling Considerations
R407C is A1, but safe and effective service also depends on blend integrity, pressure control, lubricant compatibility and correct recovery practice.
Blend Charging
R407C is normally transferred as liquid to preserve blend composition. Follow the refrigerant supplier and equipment service procedure.
Lubricant Review
R407C systems commonly use POE. R22 retrofit work may require oil-management procedures rather than assuming existing mineral oil is suitable.
Pressure, Cold & Ventilation
Use rated service equipment and PPE; large releases can cause cold injury and oxygen displacement.
Use the correct bubble/dew pressure-temperature reference for superheat, subcooling and commissioning. Blind topping-off after a major leak should not be assumed to preserve the original blend composition.
R407C Product Specification & Documentation
R407C blend composition is standardized; final batch quality, cylinder configuration and service documentation should be confirmed for the actual order.
| Refrigerant Identity | R407C |
|---|---|
| Nominal Composition | R32 23% / R125 25% / R134a 52% by mass |
| Supplied Form | Liquefied compressed refrigerant blend |
| Blend Behavior | Zeotropic; bubble/dew P-T data required |
| Batch Documentation | Confirm current specification and SDS with the order |
R407C Refrigerant Packaging Options
The supplied product list includes four R407C filling sizes covering small-volume and standard service-cylinder demand.
| Packaging Type | Reference Size | Supply Note |
|---|---|---|
| Small Container | 850 g | Small-volume distribution |
| Cylinder | 2.7 kg / 5.6 kg / 11.3 kg | Service, wholesale and distributor supply |
The source files show inconsistent large-cylinder fill data for R407C, so no bulk fill weight is stated here. Confirm any bulk or refillable-cylinder requirement directly before ordering.
R407C Is an Established R22 Retrofit Route, but Not a Drop-In
R407C remains relevant because its pressure, flow and capacity characteristics can be relatively close to R22 in air-conditioning conditions.
A proper retrofit can still require compressor approval, POE lubricant conversion or residual-oil management, filter-drier replacement, seal review, charge adjustment and recommissioning with R407C data.
Use the R22 Replacement Guide to compare R407C with other R22 transition routes before making a system-specific decision.
- Strength: established A1 AC retrofit positioning and familiar service ecosystem.
- Constraint: meaningful glide and lubricant conversion requirements.
- Long-term issue: GWP 1,774 means R407C is itself a higher-GWP transition refrigerant.
Never assume that an R22 charge can simply be recovered and replaced with R407C without system review. Follow the equipment and refrigerant retrofit procedure.
R407C Refrigerant Frequently Asked Questions
What is R407C refrigerant?
R407C is a zeotropic HFC blend containing 23% R32, 25% R125 and 52% R134a by mass.
What is the GWP of R407C?
The U.S. EPA Technology Transitions reference table lists R407C at a 100-year GWP of 1,774.
Is R407C flammable?
R407C is classified A1, meaning lower toxicity and no flame propagation under the refrigerant safety classification framework.
Is R407C a replacement for R22?
R407C is an established R22 retrofit option in selected AC and refrigeration systems, but conversion requirements such as lubricant and commissioning checks still apply.
Does R407C have temperature glide?
Yes. R407C is zeotropic and has meaningful bubble-to-dew temperature glide, so correct P-T data must be used.
How should R407C be charged?
Supplier and service guidance commonly calls for liquid transfer to preserve the blend composition.
What packaging is available for R407C?
The supplied product information lists 850 g, 2.7 kg, 5.6 kg and 11.3 kg formats.
Is R407C a long-term low-GWP refrigerant?
It has zero ODP but a GWP of 1,774, so it is better viewed as an established transition and installed-base refrigerant than a very-low-GWP endpoint.
Product information on Refrigerants.net is provided for product identification, comparison and B2B purchasing research. Final refrigerant specification, packaging, availability, transport requirements, permitted use and equipment compatibility should be confirmed against current product documentation, SDS, OEM requirements and applicable regulations before purchase or use.
Additional information
| Application | Chillers, Commercial Refrigeration, Heat Pumps, Light Commercial Air Conditioning, Residential Air Conditioning, Retrofit & Service |
|---|---|
| Composition Type | Refrigerant Blend |
| ASHRAE Safety Class | A1 |
| Package Size | 11.3 kg, 2.7 kg, 5.6 kg, 850 g |
| Packaging Type | Disposable Cylinder, Small Can |
| Refrigerant Number | R407C |
| Transport Hazard Class | Class 2.2 |
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