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Heptane - Definition and Overview |
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Heptane
| General
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| Molecular formula
| C7H16
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| CAS number
| 142-82-5
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| EC number
| 205-563-8
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| Physical characteristics
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| Appearance
| Colourless liquid
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| Melting point
| -91° Celsius
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| Boiling point
| 98° Celsius
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| Vapour density
| 3.5
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| Vapour pressure
| 40 mm Hg at 20° Celsius
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| Specific gravity
| 0.684
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| Flash point
| -1° Celsius
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| Explosion limits
| 1.1 - 7%
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| Autoignition temperature
| 222° Celsius
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Heptane (also known as dipropyl methane, gettysolve-C or heptyl hydride) is an alkane hydrocarbon with the chemical formula CH3(CH2)5CH3. Heptane has nine isomers.
The isomer n-heptane (straight-chain heptane) has been selected as 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
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Example Usage of Heptane |
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smashwolf: @Amethe the patchwork did nor adhere well with the silicone so I am peeling it all back and cleaning thoroughly with Heptane |
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GOKConservator: @rosedaly thanks for the site url. Heptane's not so bad, really. I kinda go for that kind of thing, in the right light! |
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rosedaly: L. Gibson was asked if she was going to make a cologne, ingredients would be deadly-acetic acid, furfural, Heptane, benzaldehyde |
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