File:Octane-2D-Skeletal.svg · Wikimedia Commons · See Wikimedia Commons
octane
Sign in to saveAlso known as n-octane, normal-octane, CH3-[CH2]6-CH3, n-Oktan, Oktan
Octane is a hydrocarbon and also an alkane with the chemical formula C8H18, and the condensed structural formula CH3(CH2)6CH3. Octane has many structural isomers that differ by the location of branching in the carbon chain. One of these isomers, 2,2,4-trimethylpentane (commonly called iso-octane), is used as one of the standard values in the octane rating scale.
Octane is a hydrocarbon compound made of eight carbon atoms and eighteen hydrogen atoms that exists in several different structural forms. It's important because one particular form of octane, called iso-octane, serves as a standard reference point for measuring the octane rating of gasoline.
AI-generated from the Wikipedia summary — may contain errors.
Chemical data
- Formula
- C8H18
- Molecular weight
- 114.23 g/mol
- IUPAC name
- octane
- SMILES
- CCCCCCCC
- InChIKey
- TVMXDCGIABBOFY-UHFFFAOYSA-N
- XLogP
- 3.9
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Wikidata facts
- Mass
- 114.141
Show 20 more facts
- melting point
- -56.8
- canonical SMILES
- CCCCCCCC
- chemical formula
- C₈H₁₈
- NIOSH Pocket Guide ID
- 0470
- density
- 0.70
- speed of sound
- 1197
- immediately dangerous to life or health
- 4670
- boiling point
- 125.67
- vapor pressure
- 10
- flash point
- 56
- solubility
- 0.00007
- lower flammable limit
- 1
- upper flammable limit
- 6.5
- ionization energy
- 9.82
- time-weighted average exposure limit
- 2350
- ceiling exposure limit
- 1800
- Commons category
- Octane
- refractive index
- 1.398
- standard enthalpy of formation
- -250
- combustion enthalpy
- -5470
via Wikidata · CC0
~3 min read
Article
5 sectionsContents
- Isomers
- Production and use
- See also
- References
- External links
Octane is a hydrocarbon and also an alkane with the chemical formula C8H18, and the condensed structural formula CH3(CH2)6CH3. Octane has many structural isomers that differ by the location of branching in the carbon chain. One of these isomers, 2,2,4-trimethylpentane (commonly called iso-octane), is used as one of the standard values in the octane rating scale.
Octane is a component of gasoline and petroleum. Under standard temperature and pressure, octane is an odorless, colorless liquid. Like other short-chained alkanes with a low molecular weight, it is volatile, flammable, and toxic. Octane is 1.2 to 2 times more toxic than heptane.