Refrigerant gas · Hydrocarbon (HC), natural refrigerant
R600a (isobutane)
Hydrocarbon refrigerant used in most modern domestic refrigerators.
- GWP
- 3
- ODP
- 0
- Safety class
- A3 (highly flammable)
Specifications
R600a (isobutane) properties.
| Chemical name | Isobutane (C₄H₁₀), refrigerant grade |
|---|---|
| Type | Hydrocarbon (HC), natural refrigerant |
| Composition | Refrigerant-grade isobutane (HC-600a) |
| Ozone depletion potential (ODP) | 0 |
| Global warming potential (GWP, 100 yr) | 3 |
| Boiling point at 1 atm | −11.7 °C |
| Temperature glide | None |
| Safety class (ASHRAE 34) | A3 (highly flammable) |
| Compatible oil | Mineral |
| Charging | By weight, with very small charges (grams) |
GWP values are 100-year figures from the IPCC Fourth Assessment Report (AR4), as used in most regulations. Check the cylinder label and your unit's nameplate before charging.
Applications
Where it's used.
Brands we supply
Handling notes
- Highly flammable: only for appliances built for R600a
- Charges are small, so use an accurate scale
Compare
All refrigerant gases we supply.
Always use the refrigerant your system was designed for. Mixing gases or charging the wrong one can damage the compressor.
| Gas | Type | GWP | Safety | Typical use |
|---|---|---|---|---|
| R32 | HFC, single component | 675 | A2L | Inverter and fixed-speed split ACs |
| R410A | HFC blend, near-azeotropic | 2088 | A1 | Split and multi-split ACs |
| R22 | HCFC, single component | 1810 | A1 | Older split and window ACs |
| R407C | HFC blend, zeotropic | 1774 | A1 | Package and ductable units |
| R134a | HFC, single component | 1430 | A1 | Screw and centrifugal chillers |
| R404A | HFC blend, near-azeotropic | 3922 | A1 | Cold rooms and cold storage |
| R507A | HFC blend, azeotropic | 3985 | A1 | Low temperature cold storage |
| R454B | HFO / HFC blend | 466 | A2L | New ductable and package units |
| R290 (propane) | Hydrocarbon (HC), natural refrigerant | 3 | A3 | Energy-efficient split ACs designed for R290 |
| R600a (isobutane) | Hydrocarbon (HC), natural refrigerant | 3 | A3 | Domestic refrigerators |
| R1234yf | HFO, single component | 4 | A2L | New car ACs |
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