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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.

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