n-Heptane bottle and sample from it
| IUPAC name
| Other names
|Molar mass||100.21 g/mol|
|Melting point||−91.0 to −90.1 °C (−131.8 to −130.2 °F; 182.2 to 183.1 K)|
|Boiling point||98.1 to 98.7 °C (208.6 to 209.7 °F; 371.2 to 371.8 K)|
|0.0003% (20 °C)|
|Solubility||Miscible with ethanol|
|Vapor pressure||5.33 kPa (at 20.0 °C)|
|328.57 J K−1 mol−1|
Std enthalpy of
|−225.2–−223.6 kJ mol−1|
|Safety data sheet||ScienceLab|
|Flash point||−4.0 °C|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|17,986 ppm (mouse, 2 hr)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Heptane or n-heptane is the straight-chain alkane with the chemical formula C7H16, used as solvent.
Heptane will burn when ignited in air to release carbon dioxide, water vapors and soot.
Heptane is a colorless liquid with a petroleum-like odor.
Certain types of lighter fluids contain heptane.
Car starting fluids contain a mixture of heptane and diethyl ether. Due to the large difference between their boiling points, the mixture can be separated by first distilling the ether, and then the heptane. However, some formulas may also contain other isomers of heptane, making the extraction of the pure n-heptane complicated.
Some barbecue lighter fluids tend to have a mixture of heptane and hexane, with a small addition of naphta, while others can have relative pure heptane.
Heptane can be prepared by reducing heptane derivates. However it is generally much cheaper to simply buy the compound.
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Heptane is flammable and it's vapors may be irritant if inhaled.
Heptane is best stored in closed bottles, kept in cold, dark and well ventilated places.
Heptane can be safely burned in open air or in an incinerator.