2-Methylheptane
| Names | |
|---|---|
| Preferred IUPAC name
2-Methylheptane | |
| Identifiers | |
3D model (JSmol) |
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| 1696862 | |
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.008.863 |
| EC Number |
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PubChem CID |
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| UNII | |
| UN number | 1262 |
CompTox Dashboard (EPA) |
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| Properties | |
| C8H18 | |
| Molar mass | 114.232 g·mol−1 |
| Appearance | Colourless liquid |
| Odor | Odourless |
| Density | 698 mg mL−1 |
| 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−1 kg−1 |
Refractive index (nD) |
1.395–1.396 |
| Thermochemistry | |
Heat capacity (C) |
252.00 J K−1 mol−1 |
Std molar entropy (S⦵298) |
356.39 J K−1 mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
−256.5–−253.9 kJ mol−1 |
Std enthalpy of combustion (ΔcH⦵298) |
−5466.7–−5464.3 kJ mol−1 |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H225, H304, H315, H336, H410 | |
| P210, P261, P273, P301+P310, P331 | |
| NFPA 704 (fire diamond) | |
| Flash point | 4.4 °C (39.9 °F; 277.5 K) |
| Explosive limits | 0.98–?% |
| Related compounds | |
Related alkanes |
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Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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.