Gourt Home::Gourt :: Heptane
| Heptane | |
|---|---|
| General | |
| Molecular formula | C7H16 |
| SMILES | CCCCCCC |
| Molar mass | 100.21 g/mol |
| Appearance | colorless liquid |
| CAS number | * |
| Properties | |
| Density and phase | 0.684 g/ml, liquid |
| Solubility in water | Immiscible |
| Melting point | −90.61 °C (182.55 K) |
| Boiling point | 98.42 °C (371.58 K) |
| Viscosity | 0.386 cP at 25 °C |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Flammable (F) Harmful (Xn) Dangerous for the environment (N) |
| NFPA 704 | |
| R-phrases | , , , , |
| S-phrases | , , , , , , , |
| Flash point | −4 °C |
| Autoignition temperature | 285 °C |
| Explosive limits | 1.1–6.7% |
| RTECS number | MI7700000 |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Related alkanes | Hexane Octane |
| Related compounds | Methylcyclohexane |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Chemical infobox | |
Heptane (also known as dipropyl methane, gettysolve-C or heptyl hydride) is an alkane with the chemical formula H3C(CH2)5CH3. Heptane has nine isomers:
- Heptane (n-heptane)
- 2-Methylhexane
- 3-Methylhexane
- 2,2-Dimethylpentane
- 2,3-Dimethylpentane
- 2,4-Dimethylpentane
- 3,3-Dimethylpentane
- 3-Ethylpentane
- 2,2,3-Trimethylbutane
The straight-chain isomer n-heptane is the zero point of the octane rating scale. It is undesirable in petrol, as it burns explosively, causing engine knocking, as opposed to branched-chain octane isomers, which burn more slowly and give better performance. Its choice for the zero point of the scale was due to the availability of very high purity n-heptane, unmixed with other isomers of heptane or other alkanes, distilled from the resin of Jeffrey pine. Other sources of heptane and octane, produced from crude oil, contain a mixture of different isomers with greatly differing ratings, so do not give a precise zero point.
External links
- International Chemical Safety Card 0657 (n-heptane)
- International Chemical Safety Card 0658 (2-methylhexane)
- NIOSH Pocket Guide to Chemical Hazards
- Material Safety Data Sheet for Heptane
- Phytochemical database entry
هيبتان | Heptan | Heptano | Heptano | Heptane | Heptaan | ヘプタン | Гептан | Хептан | Heptaani | Heptan
"Heptane"