Heptane


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Related to Heptane: Nonane

heptane

[′hep‚tān]
(organic chemistry)
CH3(CH2)5CH3 A hydrocarbon; water-insoluble, flammable, colorless liquid boiling at 98°C; soluble in alcohol, chloroform, and ether; used as an anesthetic, solvent, and chemical intermediate, and in standard octane-rating tests.

Heptane

 

(n-heptane), the hydrocarbon C7H16, a colorless volatile liquid with a slight odor. Boiling point, 98.4° C; density, 0.6838 g/cm3 at 20° C; refractive index (nD20), 1.3876; heat of combustion, 1167.11 kilocalories per mole (25° C); explosion limits in air, 1.10-6.00 volume · percent; flash point, −17° C. Insoluble in water; soluble in ether and other organic solvents.

The dehydrocyclization of heptane to toluene is of great interest, playing an important part in catalytic reforming and the aromatization of petroleum products. Pure heptane can be prepared by the usual methods for synthesis of saturated hydrocarbons; it can also be isolated by fractionation of petroleum or synthetic gasoline. Heptane is used as a primary reference standard in determining the knock rating of carburetor fuels (the octane number of heptane is assumed to be zero). Among the structural isomers of heptane, 2,2,3-trimethylbutane (triptane) is of practical importance, being added to motor fuels.

References in periodicals archive ?
A two-phase morphology is clearly visible in PP copolymer where the EPR phase was extracted by heptane.
The rubber blends have been immersed in acetone, heptane and toluene, respectively, for 23 hours.
7 compares various DROPLETD analyses with an Image-Pro analysis for heptane.
The surface micrograph of the region close to specimen surface after initial immersion in heptane show porous structure due to the elimination of soluble components, while no appreciable changes are observed in the micrograph of the specimen.
After cooling to 55[degrees]C, 3 ml water and 8 ml heptane were added to each flask and the flasks were shaken vigorously.
Gas chromatographic retention times for heptane were measured at 180[degrees]C following the methods described elsewhere (ref.
According to the Massachusetts Department of Environmental Protection Investigation the most probable cause for the explosion was a chemical vapor explosion of overheated heptane vapor.
These VOCs [including benzene, xylene, hexane, heptane, octane, decane, trichloroethylene (TCE), and methylene chloride] have been shown to cause illnesses in people who are exposed to the compounds in indoor spaces.
In this work, heptane, octane, decane, and dodecane were employed as liquid phases.
Pentane, hexane, and heptane are liquid hydrocarbons but not desirable as fuels for internal-combustion engines as they have low ignition temperatures and cause "knocking" or premature combustion that can seriously damage an engine.
5 mol/L triethylamine in heptane, vortex-mixed, and derivatized with 10 [micro]L HFAA at 60[degrees]C for 20 min.