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| Names | |||
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IUPAC name
2-Methylpentane
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| Other names
Isohexane
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| Identifiers | |||
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3D model (Jmol)
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| 1730735 | |||
| ChEBI | |||
| ChemSpider | |||
| ECHA InfoCard | 100.003.204 | ||
| EC Number | 203-523-4 | ||
| MeSH | 2-methylpentane | ||
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PubChem CID
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| RTECS number | SA2985000 | ||
| UNII | |||
| UN number | 1208 | ||
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| Properties | |||
| C6H14 | |||
| Molar mass | 86.18 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) | ||
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Henry's law
constant (kH) |
5.7 nmol Pa−1 kg−1 | ||
| -75.26·10−6 cm3/mol | |||
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Refractive index (nD)
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1.371 | ||
| Thermochemistry | |||
| 194.19 J K−1 mol−1 | |||
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Std molar
entropy (S |
290.58 J K−1 mol−1 | ||
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Std enthalpy of
formation (ΔfH |
−205.3–−203.3 kJ mol−1 | ||
| Hazards | |||
| GHS pictograms |
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| GHS signal word | DANGER | ||
| H225, H304, H315, H336, H411 | |||
| P210, P261, P273, P301+310, P331 | |||
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EU classification (DSD)
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| R-phrases | R11, R38, R51/53, R65, R67 | ||
| S-phrases | (S2), S16, S29, S33 | ||
| NFPA 704 | |||
| Flash point | −7 °C (19 °F; 266 K) | ||
| 306 °C (583 °F; 579 K) | |||
| Explosive limits | 1.2–7% | ||
| US health exposure limits (NIOSH): | |||
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PEL (Permissible)
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none | ||
| Related compounds | |||
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Related alkanes
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Related compounds
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2-Ethyl-1-butanol | ||
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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 | |||
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.