Industrial chemistry
Isopentane
Other name: Pentane, 2-methylbutane, methylbutane.
CAS №: 78-78-4
ЕС №: 601-006-00-1
Molecular formula: (CH3)2CHCH2CH3
Isopentane is a pentane isomer. Isopentane, C5H12, also called methylbutane or 2-methylbutane, is a branched-chain alkane with five carbon atoms. Isopentane is an extremely volatile and flammable liquid at room temperature and pressure. The normal boiling point is just a few degrees above room temperature. It is a colorless and odorless liquid.
Use:
Isopentane can be mixed with n-pentane to make EPS and it also can be mixed with cyclopentane as a foaming agent for rigid urethane foam. It is also used to produce toothpastes and cosmetics. As an anesthetic, isopentane is less potent than the shorter-chain alkanes; however, it appears more active metabolically.
Physical properties
| Molecular weight | g/mol | 72.15 |
| Melting point | °C | -159 |
| Boiled temperature | °C | 27.85 |
| Density | mg/ml | 616 |
| Vapor pressure, 20°C | kPa | 76.92 |
| Specific heat capacity | J/K*mol | 164.85 |
| Refractive index | 1.354 | |
| Octane (MI) | 92.3 | |
| Octane (MM) | 90.3 |
Quality Standard:
| Isopentane | % | 98 |
| N-Pentane | % | 1,5 |
| C4 | % | 1,5 |
| С6 | % | 0,1 |
| Sulfur | ppm | 2 |
Package:
• Steel drum, 125 kg;
• Isotank.