Open main menu

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
Methylpentane.png
Names
IUPAC name
2-Methylpentane[2]
Other names
Isohexane[1]
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 The flame pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The health hazard pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The environment pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word DANGER
H225, H304, H315, H336, H411
P210, P261, P273, P301+310, P331
NFPA 704
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 codeNFPA 704 four-colored diamond
3
2
0
Flash point −7 °C (19 °F; 266 K)
306 °C (583 °F; 579 K)
Explosive limits 1.2–7%
US health exposure limits (NIOSH):
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 ☑Y☒N ?)
Infobox references

See alsoEdit

ReferencesEdit

  1. ^ Haynes, William M. (2010). Handbook of Chemistry and Physics (91 ed.). Boca Raton, Florida: CRC Press. p. 3-364. ISBN 978-1439820773.
  2. ^ "2-methylpentane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 5 March 2012.
  3. ^ NIOSH Pocket Guide to Chemical Hazards. "#0323". National Institute for Occupational Safety and Health (NIOSH).