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| Names | |||
|---|---|---|---|
| Preferred IUPAC name 3-Methylpentane [1] | |||
| Identifiers | |||
3D model (JSmol) | |||
| 1730734 | |||
| ChEBI | |||
| ChEMBL | |||
| ChemSpider | |||
| ECHA InfoCard | 100.002.257 | ||
| EC Number |
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| MeSH | 3-methylpentane | ||
PubChem CID | |||
| 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 | 664 mg mL−1 | ||
| Melting point | −162.8 °C; −261.1 °F; 110.3 K | ||
| Boiling point | 62.9 to 63.7 °C; 145.1 to 146.6 °F; 336.0 to 336.8 K | ||
| Insoluble | |||
| log P | 3.608 | ||
| Vapor pressure | 18.0 kPa (at 17 °C) | ||
Henry's law constant (kH) | 8.8 mol Pa−1 kg−1 | ||
| −75.52·10−6 cm3/mol | |||
Refractive index (nD) | 1.376 | ||
| Thermochemistry | |||
Heat capacity (C) | 191.16 J K−1 mol−1 | ||
Std molar entropy (S⦵298) | 292.5 J K−1 mol−1 | ||
Std enthalpy of formation (ΔfH⦵298) | −203.0 – −201.0 kJ mol−1 | ||
Std enthalpy of combustion (ΔcH⦵298) | −4.1608 – −4.1590 MJ mol−1 | ||
| Hazards | |||
| GHS labelling: | |||
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| Danger | |||
| H225, H304, H315, H336, H411 | |||
| P210, P261, P273, P301+P310, P331 | |||
| Flash point | −7 °C (19 °F; 266 K) | ||
| 278 °C (532 °F; 551 K) | |||
| Explosive limits | 1.2–7.7% | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible) | none [2] | ||
| Related compounds | |||
Related alkanes | |||
Related compounds | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
3-Methylpentane is a branched alkane with the molecular formula C6H14. It is a structural isomer of hexane composed of a methyl group bonded to the third carbon atom in a pentane chain. It is of similar structure to the isomeric 2-methylpentane, which has the methyl group located on the second carbon of the pentane chain.
As of early 1990s, it was present in American [3] and European [4] gasoline in small amounts, and by 2011 its share in US gas varied between 1.5 and 6% [5] It has close research and motor octane numbers of 74.5 and 74.3. [6]
