2-Methylpentane
Appearance
(Redirected from Isohexane)
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Names | |||
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Preferred IUPAC name
2-Methylpentane[2] | |||
Other names
Isohexane[1]
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Identifiers | |||
3D model (JSmol)
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1730735 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.003.204 | ||
EC Number |
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MeSH | 2-methylpentane | ||
PubChem CID
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RTECS number |
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UNII | |||
UN number | 1208 | ||
CompTox Dashboard (EPA)
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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) | ||
Henry's law
constant (kH) |
5.7 nmol Pa−1 kg−1 | ||
-75.26·10−6 cm3/mol | |||
Refractive index (nD)
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1.371 | ||
Thermochemistry | |||
Heat capacity (C)
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194.19 J K−1 mol−1 | ||
Std molar
entropy (S⦵298) |
290.58 J K−1 mol−1 | ||
Std enthalpy of
formation (ΔfH⦵298) |
−205.3–−203.3 kJ mol−1 | ||
Hazards | |||
GHS labelling: | |||
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Danger | |||
H225, H304, H315, H336, H411 | |||
P210, P261, P273, P301+P310, P331 | |||
NFPA 704 (fire diamond) | |||
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)
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none[3] | ||
Related compounds | |||
Related alkanes
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Related compounds
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2-Ethyl-1-butanol | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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. Using a quantitative structure-activity relationship (QSAR) prediction model, 2-Methylpentane has a research octane number (RON) of 75, motor octane number (MON) of 77, and cetane number (CN) of 29.[4]
See also
[edit]References
[edit]- ^ 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.
- ^ "2-methylpentane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 5 March 2012.
- ^ NIOSH Pocket Guide to Chemical Hazards. "#0323". National Institute for Occupational Safety and Health (NIOSH).
- ^ Phuong T. M. Do; Steven Crossley; Malee Santikunaporn; Daniel E. Resasco (2007). "Catalytic strategies for improving specific fuel properties". The Royal Society of Chemistry: 38. CiteSeerX 10.1.1.1074.651.