| Section8 = }} Octane is a straight-chain alkane with the chemical formula CH₃(CH₂)₆CH₃.

Octane has 18 structural isomers:

• Octane (n-octane)
• 2-Methylheptane
• 3-Methylheptane (chiral)
• 4-Methylheptane
• 3-Ethylhexane
• 2,2-Dimethylhexane
• 2,3-Dimethylhexane (chiral)
• 2,4-Dimethylhexane (chiral)
• 2,5-Dimethylhexane
• 3,3-Dimethylhexane
• 3,4-Dimethylhexane (chiral, or meso compound)
• 2-Methyl-3-ethylpentane
• 3-Methyl-3-ethylpentane
• 2,2,3-Trimethylpentane (chiral)
• 2,2,4-Trimethylpentane (isooctane)
• 2,3,3-Trimethylpentane
• 2,3,4-Trimethylpentane
• 2,2,3,3-Tetramethylbutane

Metaphorical use

"High octane" is often used to describe a dynamic, intense lifestyle in common speech. Presumably this is by analogy with high performance cars, which tend to require a fuel with a high Octane rating.

References

External links

• (n-octane)
• Material Safety Data Sheet for Octane
• Phytochemical database entry
• Chemical and physical properties table
• "High octane" in the urban dictionary

Common isomer for Octane is Octene, with the same C8H18.