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Octane - Definition and Overview |
| Related Words: Benzine, Briquette, Butane, Carbon, Charcoal, Coal, Coke, Combustible, Dope, Ethane, Ethanol, Fireball, Firing, Flammable, Fuel, Gas, Gasoline, Heptane, Hexane, Inflammable, Isooctane |
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Octane
| General
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| Molecular formula
| C8H18
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| CAS number
| 111-65-9
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| EC number
| 203-892-1
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| Annex I Index number
| 601-009-00-8
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| Physical characteristics
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| Appearance
| Colourless liquid
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| Melting point
| -57° Celsius
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| Boiling point
| 126° Celsius
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| Vapour density
| -
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| Vapour pressure
| 11 mm Hg at 20° Celsius
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| Specific gravity
| 0.703
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| Flash point
| 15° Celsius (closed cup)
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| Explosion limits
| 0.96 - 6.5 %
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| Autoignition temperature
| 220° Celsius
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| Critical temperature
| 295.7° Celsius
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Octane is an alkane hydrocarbon with the chemical formula CH3(CH2)6CH3. It has many isomers.
One of the isomers, the iso-octane 2,2,4-trimethylpentane, is of major importance, as it has been selected as the 100 point on the octane rating scale, with n-heptane as the zero point. Octane ratings are ratings used to represent the anti-knock performance of petrol, given as the percentage of 2,2,4-trimethylpentane in an 2,2,4-trimethylpentane / n-heptane mixture that would have the same performance. It is an important constituent of petrol.
See also
External links
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Example Usage of Octane |
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mailchimp: Very cool! @MailChimp-sters (on the left) featured in this @nytimes photo taken at Atlanta's @OctaneCoffee [Octane is also a MC customer!] |
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coryholland: @mikethemiz I love Octane. Kayla and El covino always play the jams |
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keithweaver: RT @toddfs: So this is Octane. Hmm. Intown living/working is nice. Even better when I'm sharing it with the Weaver Brothers > damn right. |
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