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Related to Heptane: Nonane


(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.



(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 ?
At the start of the tests, the methane gas was saturated with the heptane distillate, circulated through the loop, and the saturated gas was sampled and analyzed.
In conclusion, based on the results of this study, it can be stated that dominant compounds in dry-cured loins were: aromatic hydrocarbon (toluene); alkanes (hexane, heptane, and 2,2,4-trimethylpentane); aldehyde (hexanal); alcohol (2-furanmethanol); ketone (3-hydroxy-2-butanone); phenol (guaiacol); and terpenes (eucalyptol, cymene, y-terpinen, and limonene).
7 compares various DROPLETD analyses with an Image-Pro analysis for heptane.
In previous paper [27], LLE of benzene + (hexane, heptane and cyclohexane) with 1-ethyl-3-methylimidazolium ethylsulfate, [EMim][EtSO4] at 308.
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.
chemapodicta the typical terpene resin composition has been completely replaced with heptane and other hydrocarbon derivatives, which has allowed this species to deter herbivory from Blepharida schlechtendalli, the specialist of the sympatric sister species B.
For several different dual phase fillers, the free energy of adsorption of heptane was found to be higher than even pure carbon black (figure 4).
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.
Because workers may have been exposed to several chemicals simultaneously, we examined associations of ALS with each chemical among the nonsmokers while adjusting for the five chemicals associated with ALS in the entire population (aliphatic chlorinated hydrocarbons, ethylene/propylene glycols, glycol ethers, heptane, and hexane; one per each model).
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.