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Octane facts for kids

Kids Encyclopedia Facts
IUPAC name Octane
CAS number 111-65-9
PubChem 356
EC number 203-892-1
DrugBank DB02440
KEGG C01387
MeSH octane
RTECS number RG8400000
Beilstein Reference 1696875
Gmelin Reference 82412
3DMet B00281
Molecular formula C8H18
Molar mass 114.23 g mol-1
Appearance Colorless liquid
Odor Gasoline-like
Density 0.703 g cm−3
Melting point

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Boiling point

Expression error: Unrecognized word "to". °C, 398.2 to 399.2 K, Expression error: Unrecognized word "to". °F

Solubility in water 0.007 mg dm−3 (at 20 °C)
log P 4.783
Vapor pressure 1.47 kPa (at 20.0 °C)
kH 29 nmol Pa−1 kg−1
-96.63·10−6 cm3/mol
Refractive index (nD) 1.398
Viscosity 542 μPa s (at 20 °C)
Std enthalpy of
formation ΔfHo298
−252.1–−248.5 kJ mol−1
Std enthalpy of
combustion ΔcHo298
−5.53–−5.33 MJ mol−1
Standard molar
entropy So298
361.20 J K−1 mol−1
Specific heat capacity, C 255.68 J K−1 mol−1
NFPA 704

NFPA 704.svg

Explosive limits 0.96–6.5%
U.S. Permissible
exposure limit (PEL)
TWA 500 ppm (2350 mg/m3)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Octane is an organic compound with the chemical formula C8H18. It is an alkane with eight carbon atoms. It is commonly used in fuel. It is the most important part of gasoline, because it is the part that lets out most of the energy that comes from gasoline when it is burned. A high octane fuel will be better than a low octane fuel.

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