Isobutane (R600a)
C4H10
Isobutane (R600a) is supplied as a liquid under its own vapour pressure in cylinders and in T50 ISO containers for international transport as well as road trailers and rail cars. It is widely used due to its low environmental impact and excellent thermodynamic performance and it is the refrigerant gas of choice in domestic and small commercial refrigerators outside of the USA. It also has applications as a heat transfer fluid in the geothermal industry.
Standard Specifications
(AGT International has multiple sources for isobutane, sample purities are shown below)
| Purity / Assay Impurities (mol) | N1.8 98% | N2.5 99.5% |
|---|---|---|
| IsoButane | > 98% | > 99.5% |
| n-Butane | < 1.0% | < 0.2% |
| Propane | < 1.0% | < 0.3% |
| Methane | < 0.1% | < 100ppm |
| Ethane | < 0.1% | < 100ppm |
| Isopentane | < 0.1% | < 10ppm |
| n-Pentane | < 0.1% | < 10ppm |
| Sulfur | < 1ppm | < 1ppm |
| Moisture | < 10ppm | < 10ppm |
Standard Container Sizes and Fill Volumes
| Container Information |  |  |  |  |
|---|---|---|---|---|
| Type | L454 Cylinder | 20' T50 ISO Container | 40' T50 ISO Container | Road Trailer |
| Contents | 222.4kg | 11,450kg | 18,650kg | 18,800kg |
*Railcars also available (US only). Please contact us for details.
Technical Information
| Technical Data | Shipping Information | ||
|---|---|---|---|
| Molecular Weight (g/mol) | 58.123 | Shipping Name | Isobutane |
| Liquid Density (kg/m³) | 593.4 | Hazard Class | 2.1 |
| Gas Density (kg/m³) | 2.51 | UN No. | UN 1969 |
| Boiling point (°C) | -11.7 | Hazard Label | Flammable gas |
| Specific Volume (m³/kg) | 0.406 | CAS No. | 72-28-0 |
| Vapour Pressure (bar.a @ 20°C) | 2.13 | ||
| Valve Outlet | Cylinder – CGA 510, T50 - ACME, MALE. 1 ¾” gas phase / 3 ¼” liquid phase | ||