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2-Methylheptane

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2-Methylheptane
Skeletal formula of 2-methylheptane
Spacefill model of 2-methylheptane
Names
Preferred IUPAC name 2-Methylheptane
Identifiers
CAS Number
3D model (JSmol)
Beilstein Reference 1696862
ChEBI
ChemSpider
ECHA InfoCard 100.008.863 Edit this at Wikidata
EC Number
  • 209-747-9
PubChem CID
UNII
UN number 1262
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C8H18/c1-4-5-6-7-8(2)3/h8H,4-7H2,1-3H3Key: JVSWJIKNEAIKJW-UHFFFAOYSA-N
SMILES
  • CCCCCC(C)C
Properties
Chemical formula C8H18
Molar mass 114.232 g·mol
Appearance Colourless liquid
Odor Odourless
Density 698 mg mL
Melting point −112 to −108 °C; −170 to −163 °F; 161 to 165 K
Boiling point 116.8 to 118.4 °C; 242.2 to 245.0 °F; 389.9 to 391.5 K
Vapor pressure 5.3 kPa (at 37.7 °C)
Henry's law
constant (kH) 		2.7 nmol Pa kg
Refractive index (nD) 1.395–1.396
Thermochemistry
Heat capacity (C) 252.00 J K mol
Std molar
entropy (S298) 		356.39 J K mol
Std enthalpy of
formation (ΔfH298) 		−256.5–−253.9 kJ mol
Std enthalpy of
combustion (ΔcH298) 		−5466.7–−5464.3 kJ mol
Hazards
GHS labelling:
Pictograms GHS02: Flammable GHS07: Exclamation mark GHS08: Health hazard GHS09: Environmental hazard
Signal word Danger
Hazard statements H225, H304, H315, H336, H410
Precautionary statements P210, P261, P273, P301+P310, P331
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 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. gasolineInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0 3 0
Flash point 4.4 °C (39.9 °F; 277.5 K)
Explosive limits 0.98–?%
Related compounds
Related alkanes
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

2-Methylheptane is a branched-chain alkane and an isomer of octane. It is an heptane molecule with a methyl group attached to its second atom. It is a flammable colorless liquid used as fuel.

If the standard definition of the prefix "iso-" is strictly used then 2-methylheptane can be called "Isooctane". However this name is usually used for another much more important isomer of octane 2,2,4-trimethylpentane.

References

  1. "2-METHYLHEPTANE - Compound Summary". PubChem Compound. National Center for Biotechnology Information. 26 March 2005. Retrieved 6 March 2012.
  2. PubChem. "2-Methylheptane". pubchem.ncbi.nlm.nih.gov. Retrieved 2024-02-18.
  3. Clayden, Jonathan (2005). Organic chemistry (Reprinted (with corrections). ed.). Oxford : Oxford Univ. Press. pp. 315. ISBN 978-0-19-850346-0.

External links

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Alkanes
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