Isobutane - Bulk
C4H10
Isobutane is produced by isomerization of n-Butane. n-Butane is separated from a natural gas stream by absorption in a light oil. It is then stripped along with propane as liquefied petroleum gas (LPG) and separated by fractional distillation: n-butane boils at -0.5° C (31.1° F); isobutane boils at -11.7° C (10.9° F).
It is filled into T50 ISO containers for international transport as well as road trailers and rail cars. ISO Containers are approved by UN, RID/ADR, CSC, AAR-600, DOT, TC, TIR, UIC.
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 | 20' T50 ISO Container | 30' T50 ISO Container | Road Trailer |
| Contents | 12,000kg | 17,175kg | 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 | ACME, MALE. 1 ¾” gas phase / 3 ¼” liquid phase. | ||