Heptane
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| Names | |
|---|---|
| IUPAC name
Heptane[1] | |
| Other names
Septane[2] | |
| Identifiers | |
| |
3D model (JSmol) |
|
| 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 |
|
| 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 | |
| GHS labelling: | |
| Template:GHS flame Template:GHS exclamation mark Template:GHS health hazard Template:GHS environment | |
| Danger | |
| H225, H304, H315, H336, H410 | |
| P210, P261, P273, P301+P310, P331 | |
| NFPA 704 (fire diamond) | |
| Flash point | −4.0 °C (24.8 °F; 269.1 K) |
| 223.0 °C (433.4 °F; 496.1 K) | |
| Explosive limits | 1.05–6.7% |
| Lethal dose or concentration (LD, LC): | |
LC50 (median concentration) |
17,986 ppm (mouse, 2 hr)[5] |
LCLo (lowest published) |
16,000 ppm (human) 15,000 ppm (mouse, 30 min)[5] |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 500 ppm (2000 mg/m3)[4] |
REL (Recommended) |
TWA 85 ppm (350 mg/m3) C 440 ppm (1800 mg/m3) [15-minute][4] |
IDLH (Immediate danger) |
750 ppm[4] |
| Related compounds | |
Related alkanes |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is  ?) | |
| Infobox references | |
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.
References
[change | change source]- ↑ "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. Archived from the original on 28 April 2018. Retrieved 3 April 2018 – via rspl.royalsocietypublishing.org.
- 1 2 3 4 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 3.290. ISBN 1439855110.
- 1 2 3 4 NIOSH Pocket Guide to Chemical Hazards. "#0312". National Institute for Occupational Safety and Health (NIOSH).
- 1 2 "n-Heptane". Immediately Dangerous to Life or Health Concentrations. National Institute for Occupational Safety and Health.