Octane

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Octane
Names
IUPAC name
Octane[1]
Identifiers
3D model (JSmol)
3DMet {{{value}}}
Beilstein Reference 1696875
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.003.539
EC Number 203-892-1
Gmelin Reference 82412
KEGG
MeSH {{{value}}}
PubChem {{{value}}}
RTECS number RG8400000
UN number 1262
SMILES {{{value}}}
Properties
C8H18
Molar mass 114.23 g·mol−1
Appearance Colorless liquid
Odor Gasoline-like[2]
Density 0.703 g cm−3
Melting point −57.1 to −56.6 °C; −70.9 to −69.8 °F; 216.0 to 216.6 K
Boiling point 125.1 to 126.1 °C; 257.1 to 258.9 °F; 398.2 to 399.2 K
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
Conjugate acid Octonium
-96.63·10−6 cm3/mol
1.398
Viscosity 542 μPa s (at 20 °C)
Thermochemistry
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
Hazards
NFPA 704

NFPA 704.svg

3
1
0
 
Explosive limits 0.96–6.5%
U.S. Permissible
exposure limit (PEL)
TWA 500 ppm (2350 mg/m3)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Octane is an organic compound with the chemical formula C
8
H
18
. 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.

References[change | change source]

  1. "octane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 6 January 2012.
  2. 2.0 2.1 "NIOSH Pocket Guide to Chemical Hazards #0470". National Institute for Occupational Safety and Health (NIOSH).