2,5-Dimethylhexane is a branched alkane used in the aviation industry in low revolutions per minute helicopters.[2] As an isomer of octane, the boiling point is very close to that of octane, but can in pure form be slightly lower. 2,5-Dimethylhexane is moderately toxic.
Quick Facts Names, Identifiers ...
2,5-Dimethylhexane
Skeletal formula of 2,5-dimethylhexane |
Ball and stick model of 2,5-dimethylhexane |
Names |
Preferred IUPAC name
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Identifiers |
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1696877 |
ChemSpider |
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ECHA InfoCard |
100.008.861 |
EC Number |
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UNII |
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UN number |
3295 |
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InChI=1S/C8H18/c1-7(2)5-6-8(3)4/h7-8H,5-6H2,1-4H3 Y Key: UWNADWZGEHDQAB-UHFFFAOYSA-N Y
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Properties |
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C8H18 |
Molar mass |
114.232 g·mol−1 |
Appearance |
Colourless liquid |
Odor |
Odourless |
Density |
694 mg mL−1 |
Melting point |
−93 to −89 °C; −136 to −128 °F; 180 to 184 K |
Boiling point |
108.1 to 109.9 °C; 226.5 to 229.7 °F; 381.2 to 383.0 K |
Vapor pressure |
7.582 kPa (at 37.7 °C) |
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3.0 nmol Pa−1 kg−1 |
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−98.15·10−6 cm3/mol |
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1.392 |
Thermochemistry |
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249.20 J K−1 mol−1 |
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−262.0 – −259.0 kJ mol−1 |
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−5.4615 – −5.4587 MJ mol−1 |
Hazards |
GHS labelling: |
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Danger |
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H225, H304, H315, H336, H410 |
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P210, P261, P273, P301+P310, P331 |
Flash point |
26 °C (79 °F; 299 K) |
Explosive limits |
0.98–?% |
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).
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