Heptane
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 | |
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IUPAC name
Heptane[1] | |
Other names
Septane[2] | |
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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SMILES
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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 |
3
1
0
|
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). | |
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Infobox references | |
References
- "n-heptane – Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 2 January 2012.
- 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.
- Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 3.290. ISBN 1439855110.
- NIOSH Pocket Guide to Chemical Hazards. "#0312". National Institute for Occupational Safety and Health (NIOSH).
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