R134a Refrigerant Gas
R134a (HFC-134a) is a single-component HFC refrigerant widely associated with automotive air conditioning, refrigeration equipment and chiller applications.
It remains important in the installed base and in equipment specifically designed for R134a, while many new applications are transitioning to lower-GWP refrigerants.
Available in small cans, service cylinders and larger supply formats. Confirm current packaging, batch specification and destination requirements for each order.
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Description
R134a Refrigerant Gas
R134a, also known as HFC-134a or 1,1,1,2-tetrafluoroethane, is a single-component HFC refrigerant with an A1 safety classification and zero ozone depletion potential.
R134a became a major refrigerant for mobile air conditioning, household and self-contained refrigeration, centrifugal chillers and other equipment designed around its pressure and thermodynamic characteristics.
Its 100-year GWP is 1,430 on the U.S. EPA Technology Transitions reference basis. As refrigerant policy moves toward lower-GWP options, R134a is increasingly an installed-base, service or application-specific refrigerant rather than a universal choice for new equipment.
For a deeper technical overview, see the R134a refrigerant profile and the R134a replacement guide.
Key R134a Refrigerant Properties
Core reference data for customers comparing R134a supply, applications and equipment compatibility.
R134a Technical Specifications
The values below are established reference properties for R134a and are intended for product identification and screening.
| Refrigerant Designation | R134a / HFC-134a |
|---|---|
| Chemical Name | 1,1,1,2-Tetrafluoroethane |
| Molecular Formula | CF₃CH₂F |
| Refrigerant Type | Single-component HFC |
| Molecular Weight | ≈ 102.0 g/mol |
| Normal Boiling Point | ≈ -26.1°C |
| Critical Temperature | ≈ 101.0°C |
| Critical Pressure | ≈ 40.6 bar |
| Ozone Depletion Potential (ODP) | 0 |
| 100-Year Global Warming Potential | 1,430 — EPA Technology Transitions reference |
| ASHRAE Safety Class | A1 |
| Transport Hazard Class | Class 2.2 |
Reference values are provided for product identification and research. For system design, charging, service and compliance, use the current supplier P-T data, SDS, certificate of analysis where applicable, OEM documentation and the regulations governing the project.
Typical R134a Applications
R134a has been used across several very different equipment categories. Application suitability must be tied to the actual equipment design and current regional rules.
Automotive Air Conditioning
R134a remains a major installed-base refrigerant in vehicles and mobile AC systems originally designed for HFC-134a.
Domestic & Self-Contained Refrigeration
R134a has a long history in refrigerators, freezers and compact refrigeration equipment, although many new products have moved to lower-GWP alternatives.
Commercial Refrigeration
Selected medium-temperature and self-contained systems use R134a where the equipment and regulations permit it.
Centrifugal Chillers
R134a has been widely used in larger chiller platforms designed specifically for its operating characteristics.
Secondary Loop Systems
R134a has also been used as a heat-transfer refrigerant in selected secondary-loop cooling applications.
Service & Installed Base
A substantial installed base continues to create legitimate service, recovery, reclamation and replacement-planning demand.
Explore application-specific context in our Automotive AC Refrigerants and Chiller Refrigerants guides.
R134a Safety and Handling Considerations
R134a is A1, but safe handling still requires control of pressure, cold-contact exposure, oxygen displacement and decomposition hazards.
Pressurized Refrigerant
Use cylinders, hoses, recovery machines and charging tools rated for R134a and the intended service pressure.
Cold Contact
Rapid liquid release can produce frostbite. Use appropriate eye, hand and skin protection during transfer and service.
Ventilation & Hot Work
Large releases can displace oxygen, and refrigerant exposed to high heat or flame can form hazardous decomposition products.
Do not select R134a solely because an application has historically used it. Confirm the equipment nameplate, lubricant, manufacturer instructions and current market regulations before charging or converting a system.
R134a Product Specification & Documentation
Supply specifications should be confirmed against the current batch documentation rather than assumed from a generic refrigerant name.
| Refrigerant Identity | R134a / HFC-134a |
|---|---|
| Composition | Single-component 1,1,1,2-tetrafluoroethane |
| Supplied Form | Liquefied compressed refrigerant gas |
| Batch Documentation | Current COA / specification available according to order and supply arrangement |
| Safety Documentation | Use the current SDS for storage, transport and handling requirements |
R134a Refrigerant Packaging Options
The supplied product information supports R134a packaging from small service cans through larger industrial supply formats.
| Packaging Type | Reference Size | Supply Note |
|---|---|---|
| Small Can | 340 g / 500 g / 820 g / 1 kg | Small-volume service and distribution |
| Cylinder | 3.4 kg / 6.8 kg / 13.6 kg | Service, wholesale and distributor supply |
| Large Supply | Reference 920 kg format | Large-volume orders; final cylinder or bulk configuration must be confirmed |
Packaging, filling weight, valve configuration, cylinder type, minimum order quantity and bulk availability may vary by destination and order requirement. Confirm the final supply configuration before ordering.
R134a Is Moving Through an Application-Specific Transition
R134a is not disappearing from every application at the same time. Automotive AC, chillers, domestic refrigeration and commercial refrigeration have different replacement technologies, regulations and equipment architectures.
For new projects, start with the actual application rather than looking for one universal “R134a replacement.” Review the R134a Replacement Guide for application-specific pathways.
Existing equipment designed for R134a can still create service demand, but new-equipment choices should be checked against current OEM approvals and local HFC or F-gas requirements.
- Automotive: many newer platforms use R1234yf or other approved mobile-AC technologies.
- Domestic refrigeration: purpose-designed R600a systems are now common in many markets.
- Chillers: alternatives depend strongly on chiller type, pressure level and manufacturer platform.
R1234yf, R600a, R513A, R450A and other lower-GWP refrigerants should not be treated as universal drop-in replacements for an existing R134a system.
R134a Refrigerant Frequently Asked Questions
What is R134a refrigerant?
R134a is 1,1,1,2-tetrafluoroethane, a single-component HFC refrigerant widely used historically in automotive AC, refrigeration and chiller systems.
What is the GWP of R134a?
The U.S. EPA Technology Transitions reference table lists HFC-134a at a 100-year GWP of 1,430.
Is R134a flammable?
R134a is classified A1, meaning lower toxicity and no flame propagation under the refrigerant safety classification framework.
Where is R134a used?
Major use contexts include automotive air conditioning, installed domestic and self-contained refrigeration, selected commercial refrigeration and centrifugal chillers.
What R134a packaging is available?
The supplied product information includes 340 g, 500 g, 820 g and 1 kg small cans plus 3.4 kg, 6.8 kg and 13.6 kg cylinders, with larger-volume supply also listed.
Can R1234yf replace R134a directly?
Do not assume a direct retrofit. R1234yf is a different A2L refrigerant and mobile-AC conversion depends on vehicle design, approvals, fittings, service procedures and regulations.
Can R600a replace R134a in a refrigerator?
Not as a simple charge substitution. R600a is A3 and is used in purpose-designed equipment with different safety and charge requirements.
Should R134a be charged only into equipment approved for it?
Yes. Refrigerant selection should follow the equipment nameplate, OEM documentation, lubricant requirements and applicable regulations.
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 | Automotive Air Conditioning, Chillers, Commercial Refrigeration, Domestic Refrigeration |
|---|---|
| Composition Type | Single Component |
| ASHRAE Safety Class | A1 |
| Package Size | 1 kg, 13.6 kg, 3.4 kg, 340 g, 500 g, 6.8 kg, 820 g, 920 kg |
| Packaging Type | Disposable Cylinder, ISO Tank / Bulk, Refillable Cylinder, Small Can |
| Refrigerant Number | R134a |
| Transport Hazard Class | Class 2.2 |
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