Heptane
linear chemical compound
Heptane is an organic compound with the chemical formula C
7H
16. It is an alkane with seven carbon atoms. It is used in fuels and is in gasoline.
| Names | ||
|---|---|---|
| IUPAC name
Heptane[2]
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| Other names
Septane[1]
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| Identifiers | ||
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3D model (JSmol)
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| Beilstein Reference | 1730763 | |
| ChEBI | ||
| ChEMBL | ||
| ChemSpider | ||
| ECHA InfoCard | 100.005.058 | |
| EC Number |
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| Gmelin Reference | 49760 | |
| MeSH | n-heptane | |
PubChem CID
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| RTECS number |
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| UNII | ||
| UN number | 1206 | |
CompTox Dashboard (EPA)
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| Properties | ||
| C7H16 | ||
| Molar mass | 100.21 g·mol−1 | |
| Appearance | Colourless liquid | |
| Odor | Petrolic | |
| Density | 0.6795 g cm−3[3] | |
| Melting point | −90.549[3] °C (−130.988 °F; 182.601 K) | |
| Boiling point | 98.38[3] °C (209.08 °F; 371.53 K) | |
| 0.0003% (20 °C)[4] | ||
| log P | 4.274 | |
| Vapor pressure | 5.33 kPa (at 20.0 °C) | |
| kH | 12 nmol Pa−1 kg−1 | |
| -85.24·10−6 cm3/mol | ||
Refractive index (nD)
|
1.3855[3] | |
| Viscosity | 0.386 mPa·s | |
| 0.0 D | ||
| Thermochemistry | ||
| Std enthalpy of formation ΔfH |
−225.2–−223.6 kJ mol−1 | |
| Std enthalpy of combustion ΔcH |
−4.825–−4.809 MJ mol−1 | |
| Standard molar entropy S |
328.57 J K−1 mol−1 | |
| Specific heat capacity, C | 224.64 J K−1 mol−1 | |
| Hazards | ||
| NFPA 704 |
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| Explosive limits | 1.05–6.7% | |
| U.S. Permissible exposure limit (PEL) |
TWA 500 ppm (2000 mg/m3)[4] | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | ||
 verify (what is   ?)
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| Infobox references | ||
References change
- ↑ Hofmann, August Wilhelm Von (1 January 1867). "I. On the action of trichloride of phosphorus on the salts of the aromatic monamines". Proceedings of the Royal Society of London. 15: 54–62. doi:10.1098/rspl.1866.0018. S2CID 98496840. Retrieved 3 April 2018 – via rspl.royalsocietypublishing.org.
- ↑ "n-heptane – Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 2 January 2012.
- ↑ 3.0 3.1 3.2 3.3 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 3.290. ISBN 1439855110.
- ↑ 4.0 4.1 NIOSH Pocket Guide to Chemical Hazards. "#0312". National Institute for Occupational Safety and Health (NIOSH).