Hexane

Hexane is an organic compound with the chemical formula C6H14. It is an alkane with 6 carbon atoms. "Hexane" can mean any of the 5 structural isomers (meaning compounds with the same chemical formula but a different shape) it has. IUPAC naming says that "hexane" only means the isomer with no branches, with the other 4 having different names.

Hexane
Hexane-2D-Skeletal.svg
Hexane-2D-B.png
Hexane-from-xtal-1999-at-an-angle-3D-balls.png
Hexane-3D-vdW.png
IUPAC name Hexane[1]
Other names Sextane[2]
Identifiers
CAS number 110-54-3
PubChem 8058
EC number 203-777-6
DrugBank DB02764
KEGG C11271
MeSH n-hexane
ChEBI CHEBI:29021
RTECS number MN9275000
SMILES CCCCCC
Beilstein Reference 1730733
Gmelin Reference 1985
Properties
Molecular formula C6H14
Molar mass 86.18 g mol-1
Appearance Colorless liquid
Odor Petrolic
Density 0.6606 g mL−1[3]
Melting point

Expression error: Unrecognized word "to". °C, 177 to 179 K, Expression error: Unrecognized word "to". °F

Boiling point
Solubility in water 9.5 mg L−1
log P 3.764
Vapor pressure 17.60 kPa (at 20.0 °C)
kH 7.6 nmol Pa−1 kg−1
λmax 200 nm
−74.6·10−6 cm3/mol
Refractive index (nD) 1.375
Viscosity 0.3 mPa·s
Thermochemistry
Std enthalpy of
formation
ΔfHo298
−199.4–−198.0 kJ mol−1
Std enthalpy of
combustion
ΔcHo298
−4180–−4140 kJ mol−1
Standard molar
entropy
So298
296.06 J K−1 mol−1
Specific heat capacity, C 265.2 J K−1 mol−1
Hazards
Main hazards Reproductive toxicity – After aspiration, pulmonary oedema, pneumonitis, and death [4]
NFPA 704

NFPA 704.svg

3
1
0
 
Explosive limits 1.2–7.7%
U.S. Permissible
exposure limit (PEL)
TWA 500 ppm (1800 mg/m3)[5]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Hexane is often part of modern gasoline. Pure hexane has no color and is quite unreactive.

Hexane Media

References

  1. "n-hexane – Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Archived from the original on 8 March 2012. Retrieved 31 December 2011.
  2. Hofmann, August Wilhelm Von (1 January 1867). "I. On the action of trichloride of phosphorus on the salts of the aromatic monamines". Proceedings of the Royal Society of London. 15: 54–62. doi:10.1098/rspl.1866.0018. S2CID 98496840. Archived from the original on 28 April 2018. Retrieved 28 April 2018 – via rspl.royalsocietypublishing.org.
  3. William M. Haynes (2016). CRC Handbook of Chemistry and Physics (97th ed.). Boca Raton: CRC Press. p. 3–298. ISBN 978-1-4987-5429-3.
  4. GHS Classification on [PubChem]
  5. NIOSH Pocket Guide to Chemical Hazards. "#0322". National Institute for Occupational Safety and Health (NIOSH).