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.
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| Names | |||
|---|---|---|---|
| IUPAC name
2-Methylpentane[1] | |||
| Other names
Isohexane[2] | |||
| Identifiers | |||
CAS Number |
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3D model (JSmol) |
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Beilstein Reference |
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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InChI
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SMILES
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| Properties | |||
Chemical formula |
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 | ||
Magnetic susceptibility (χ) |
-75.26·10−6 cm3/mol | ||
Refractive index (nD) |
1.371 | ||
| Thermochemistry | |||
Heat capacity (C) |
194.19 J K−1 mol−1 | ||
Std molar entropy (S |
290.58 J K−1 mol−1 | ||
Std enthalpy of formation (ΔfH⦵298) |
−205.3–−203.3 kJ mol−1 | ||
| Hazards | |||
| GHS pictograms |     | ||
| GHS Signal word | Danger | ||
GHS hazard statements |
H225, H304, H315, H336, H411 | ||
GHS precautionary statements |
P210, P261, P273, P301+310, P331 | ||
| NFPA 704 (fire diamond) | 
3
2
0 | ||
| Flash point | −7 °C (19 °F; 266 K) | ||
Autoignition temperature |
306 °C (583 °F; 579 K) | ||
| Explosive limits | 1.2–7% | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible) |
none[3] | ||
| Related compounds | |||
Related alkanes |
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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). | |||
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| Infobox references | |||
See also
- Heteropoly acid
References
- "2-methylpentane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 5 March 2012.
- Haynes, William M. (2010). Handbook of Chemistry and Physics (91 ed.). Boca Raton, Florida: CRC Press. p. 3-364. ISBN 978-1439820773.
- NIOSH Pocket Guide to Chemical Hazards. "#0323". National Institute for Occupational Safety and Health (NIOSH).
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