Refrigerant Knowledge Center
What Is R452A Refrigerant? Properties, Uses and Safety
R452A is an A1 zeotropic HFO/HFC blend developed for transport and other low- and medium-temperature refrigeration applications where discharge-temperature behavior is an important selection factor.
What Is R452A?
R452A is an A1 zeotropic HFO/HFC blend developed for transport and other low- and medium-temperature refrigeration applications where discharge-temperature behavior is an important selection factor.
R452A is classified as zeotropic blend in the HFO/HFC blend family. Its composition is 11% R32 / 59% R125 / 30% R1234yf by mass. Refrigerant choice is never based on designation alone: capacity, pressure, lubricant, controls, heat-exchanger behavior, safety standards and local rules all matter.
R452A Technical Properties
General reference values for comparison; a current product specification and applicable regulatory basis govern a transaction.
| Refrigerant designation | R452A |
|---|---|
| Chemical family | HFO/HFC blend |
| Composition | 11% R32 / 59% R125 / 30% R1234yf by mass |
| Blend type | zeotropic blend |
| ASHRAE safety class | A1 |
| 100-year GWP | 1945 (IPCC AR5 100-year, manufacturer-reported) |
| Ozone depletion potential | 0 |
| Normal boiling reference | -46.9 (glide applies) °C |
Common R452A Applications
Typical references include transport refrigeration, and low- and medium-temperature refrigeration.
Use depends on equipment design, operating envelope and applicable local requirements.
Use depends on equipment design, operating envelope and applicable local requirements.
Advantages and Limitations
Selection advantages
- Established refrigerant designation with published reference data.
- Application history in transport refrigeration.
- ODP reference of 0.
Important limitations
- A1 safety controls must be applied.
- GWP and lifecycle status can affect long-term selection.
- No refrigerant should be treated as a universal drop-in.
Environmental Impact and Regulation
R452A remains a fluorinated blend with substantial GWP, so regional transition schedules and end-use limits must be checked.
R452A has an ODP reference of 0 and a stated GWP of 1945 using IPCC AR5 100-year, manufacturer-reported. Regulations commonly distinguish between manufacturing or import, new equipment, servicing, recovered material and individual end uses.
Safety, Handling and Storage
Use only under an approved equipment or retrofit procedure, charge as liquid and verify glide, lubricant, seals, controls and operating envelope.
The A1 classification describes toxicity and flammability groupings; it does not by itself approve a refrigerant for a particular system. Review the current safety data sheet, cylinder label, transport classification, equipment manual and local code.
R452A Alternatives and Comparisons
Candidate alternatives must be evaluated as system choices, not simple chemical substitutions.
HFC blend; A1 safety class; GWP 3922 on the stated IPCC AR4 100-year basis.
HFC blend; A1 safety class; GWP 3985 on the stated IPCC AR4 100-year basis.
HFO/HFC blend; A1 safety class; GWP 1273 on the stated IPCC AR5 100-year, manufacturer-reported basis.
HFO/HFC blend; A1 safety class; GWP 1282 on the stated IPCC AR5 100-year, manufacturer-reported basis.
R452A Frequently Asked Questions
What is R452A made of?
11% R32 / 59% R125 / 30% R1234yf by mass; it is categorized as zeotropic blend.
What is the safety class of R452A?
The published classification used in this guide is A1. Equipment approval and local safety rules still apply.
What is the GWP of R452A?
The reference here is 1945 on the IPCC AR5 100-year, manufacturer-reported basis. Other assessment bases may show a different number.
Can R452A replace another refrigerant directly?
No universal drop-in claim is made. Compatibility and conversion requirements must be confirmed for the exact equipment.
Where is R452A commonly used?
Typical applications include transport refrigeration, and low- and medium-temperature refrigeration, subject to equipment design and local approval.
References and Technical Sources
Source data is summarized for general education. Always use current official documents, standards and supplier-specific safety and technical data for engineering or compliance decisions.
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