2-Methylpentane

2-Methylpentane, trivially known as isohexane, is a branched-chain alkane with the molecular formula C6H14. It is a structural isomer of hexane composed of a methyl group bonded to the second carbon atom in a pentane chain.

2-Methylpentane
Skeletal formula of 2-methylpentane
Names
IUPAC name
2-Methylpentane[1]
Other names
Isohexane[2]
Identifiers
3D model (JSmol)
1730735
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.204
EC Number
  • 203-523-4
MeSH 2-methylpentane
RTECS number
  • SA2985000
UNII
UN number 1208
Properties
C6H14
Molar mass 86.178 g·mol−1
Appearance Colorless liquid
Odor Odorless
Density 653 mg mL−1
Melting point −160 to −146 °C; −256 to −231 °F; 113 to 127 K
Boiling point 60 to 62 °C; 140 to 143 °F; 333 to 335 K
log P 3.608
Vapor pressure 46.7 kPa (at 37.7 °C)
5.7 nmol Pa−1 kg−1
-75.26·10−6 cm3/mol
1.371
Thermochemistry
194.19 J K−1 mol−1
290.58 J K−1 mol−1
−205.3–−203.3 kJ mol−1
Hazards
GHS pictograms
GHS Signal word Danger
H225, H304, H315, H336, H411
P210, P261, P273, P301+310, P331
NFPA 704 (fire diamond)
Flammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineHealth code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
2
0
Flash point −7 °C (19 °F; 266 K)
306 °C (583 °F; 579 K)
Explosive limits 1.2–7%
NIOSH (US health exposure limits):
PEL (Permissible)
none[3]
Related compounds
Related alkanes
Related compounds
2-Ethyl-1-butanol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

See also

References

  1. "2-methylpentane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 5 March 2012.
  2. Haynes, William M. (2010). Handbook of Chemistry and Physics (91 ed.). Boca Raton, Florida, USA: CRC Press. p. 3-364. ISBN 978-1-43982077-3.
  3. NIOSH Pocket Guide to Chemical Hazards. "#0323". National Institute for Occupational Safety and Health (NIOSH).


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