R507A Refrigerant Gas
R507A is an azeotropic HFC refrigerant blend containing 50% R125 and 50% R143a by mass, historically used in low- and medium-temperature refrigeration.
It is closely associated with commercial and industrial refrigeration installed bases and has an A1 safety classification, but its high GWP makes current use strongly application- and regulation-dependent.
Available in cylinder and larger-volume supply formats. Confirm current packaging, batch specification and destination requirements for each order.
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Description
R507A Refrigerant Gas
R507A is an azeotropic HFC blend of R125 and R143a in a nominal 50/50 mass ratio. It has zero ozone depletion potential and an A1 safety classification.
The refrigerant became established in low- and medium-temperature commercial and industrial refrigeration, including applications with operating characteristics similar to those historically served by R404A.
The U.S. EPA Technology Transitions reference table lists R507A at a 100-year GWP of 3,985. That high climate impact has shifted the market toward lower-GWP alternatives for many new systems while R507A remains relevant to installed equipment and service supply.
For technical context, see the R507A refrigerant profile and the R404A replacement guide for related low-temperature transition research.
Key R507A Refrigerant Properties
Core reference data for identifying R507A and screening commercial refrigeration applications.
R507A Technical Specifications
The table below uses established composition, safety and climate-reference data for R507A without assuming equipment compatibility.
| Refrigerant Designation | R507A |
|---|---|
| Nominal Composition | R125 / R143a = 50 / 50 mass % |
| Refrigerant Type | Azeotropic HFC blend |
| Ozone Depletion Potential (ODP) | 0 |
| 100-Year Global Warming Potential | 3,985 — U.S. EPA Technology Transitions reference |
| ASHRAE Safety Class | A1 |
| Transport Hazard Class | Class 2.2 |
Use the exact supplier pressure-temperature data, SDS and OEM documentation for charging, service and engineering work. Similar application history does not establish interchangeability with R404A or any other refrigerant.
Typical R507A Applications
R507A is primarily associated with low- and medium-temperature refrigeration. The examples below describe recognized use contexts, not blanket approval for every system.
Commercial Refrigeration
R507A has been used in low- and medium-temperature commercial refrigeration systems designed and approved for the blend.
Cold Storage
Cold rooms, freezer systems and related low-temperature installations form part of the established R507A installed base.
Industrial Refrigeration
Selected industrial direct-expansion refrigeration systems use R507A where the compressor, lubricant and components are specified for it.
See our Commercial Refrigeration and Cold Storage Refrigerants guides for application-level selection context.
R507A Safety and Handling Considerations
R507A is A1, but safe service still requires attention to pressure, oxygen displacement, cold-contact injury and recovery procedures.
Pressurized Refrigerant
Use cylinders, hoses, recovery equipment and gauges rated for R507A and the actual system pressure.
Cold Contact
Liquid refrigerant can cause frostbite during rapid release. Use appropriate eye, hand and skin protection.
Recovery & Ventilation
Recover refrigerant during service and equipment retirement, and provide adequate ventilation where a significant release could occur.
R507A and R404A have overlapping historical applications but different compositions and climate metrics. Confirm OEM approval, lubricant, compressor operating envelope and service procedure before any refrigerant change.
R507A Product Specification & Documentation
Supply specifications should be confirmed from current batch documentation and order-specific product information.
| Refrigerant Identity | R507A |
|---|---|
| Nominal Composition | 50% R125 / 50% R143a by mass |
| Supplied Form | Liquefied compressed refrigerant blend |
| Batch Documentation | Current specification / COA available according to order requirements |
R507A Refrigerant Packaging Options
The supplied product information includes standard cylinder and larger-volume R507A supply references.
| Packaging Type | Reference Size | Supply Note |
|---|---|---|
| Cylinder | 11.3 kg | Service, wholesale and distributor supply |
| Large-Volume Supply | 690 kg reference | Confirm cylinder / bulk configuration and logistics before ordering |
Packaging type, filling weight, valve configuration and large-volume supply method may vary by market and shipment. Confirm the exact order configuration before purchase.
R507A Is Primarily an Installed-Base and Transition Refrigerant
R507A delivered zero-ODP refrigeration performance for low-temperature applications, but its high GWP now limits its long-term role in many new-equipment pathways.
Existing R507A equipment may continue to create service demand, while new and retrofit projects increasingly evaluate lower-GWP refrigerants or different system architectures according to the application.
- Installed equipment: maintain only with the refrigerant and service practices approved for the system.
- Retrofit research: compare alternatives such as R448A, R449A and other application-approved routes rather than assuming a direct swap.
- New systems: select refrigerant from the approved equipment platform and current regional regulation.
Do not treat overlapping application history as proof that one refrigerant can always replace the other without an OEM-approved procedure.
R507A Refrigerant Frequently Asked Questions
What is R507A refrigerant?
R507A is an azeotropic HFC blend containing 50% R125 and 50% R143a by mass.
What is the GWP of R507A?
The U.S. EPA Technology Transitions reference table lists R507A at a 100-year GWP of 3,985.
What is the safety class of R507A?
R507A is classified A1.
What is R507A used for?
It is primarily associated with low- and medium-temperature commercial and industrial refrigeration and cold-storage applications.
Is R507A the same as R404A?
No. They have overlapping refrigeration applications but different blend compositions and GWP values.
Can R507A be replaced with a lower-GWP refrigerant?
Some systems have application-specific retrofit pathways, but the correct choice depends on compressor approval, lubricant, controls, operating temperature and current regulation.
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 | Cold Storage, Commercial Refrigeration |
|---|---|
| Composition Type | Refrigerant Blend |
| ASHRAE Safety Class | A1 |
| Package Size | 11.3 kg, 690 kg |
| Packaging Type | Disposable Cylinder, ISO Tank / Bulk, Refillable Cylinder |
| Refrigerant Number | R507A |
| Transport Hazard Class | Class 2.2 |
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