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Octane

Octane has the chemical formula C8H18, the eighth member of the alkane group. It has 18 isomers (22 if stereoisomers are included). Among them, the isomer 2,2,4-trimethylpentane has very low knocking phenomenon when used as gasoline engine fuel, so it is set as the standard of octane number 100....

Release time：2025-04-26

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Octane has the chemical formula C8H18, the eighth member of the alkane group. It has 18 isomers (22 if stereoisomers are included). Among them, the isomer 2,2,4-trimethylpentane has very low knocking phenomenon when used as gasoline engine fuel, so it is set as the standard of octane number 100.

Name: n-octane

Other name: octane

CAS number: 111-65-9

Molecular formula: C8H18

Appearance and properties: transparent colorless liquid

Purity: more than 99%

Density: 0.703 g/mL at 25 °C (lit.)

Melting point: −57 °C (lit.)

Boiling point: 125-127 °C (lit.)

Flash point: 60 °F

Refractive index: n20/D 1.398 (lit.)

Water solubility: 0.0007 g/L (20 ºC)

Storage conditions: low temperature, ventilated and dry warehouse, prevent open flames, sparks, friction, and store separately from oxidants

Vapor pressure: 11 mm Hg (20 °C)

Vapor density: 3.9 (vs air)

Product use

N-octane is one of the components of industrial gasoline, and can also be used as a solvent and raw material for organic synthesis.

Storage and transportation

Packaging, storage and transportation: Sealed packaging in painted iron barrels or tank trucks. Storage should be placed in a dry and cool place, and the warehouse should have ventilation facilities to avoid contact with moisture to prevent hydrolysis. Transportation should comply with national regulations on the transportation of hazardous chemicals by road and rail.

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