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(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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Sintering temperature Surface area ([m.sup.2]/g) 300 30.82 400 16.42 600 18.67 700 8.98 Table 2: Data obtained by injecting 1.0 [micro]L of the transesterification reaction diluted in heptane (1:1000) using Nb[Cl.sub.5] as catalyst.
Kunrath, "Chemical kinetic modeling study of shock tube ignition of heptane isomers," International Journal of Chemical Kinetics, vol.
Bond Elut N[H.sub.2] 500 mg and 3mL columns (Agilent Technologies, USA) were used as stationary phases and conditioned using 7.5 mL heptane. The samples (500 [micro]L) were applied to the columns, and NLs were eluted into glass vials using 5 mL chloroform, FFAs were eluted using 5 mL 98: 2 diethyl ether: acetic acid (v/v), and PLs were eluted using 5mL of methanol.
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).
The preparation of an analytical reference sample can be made by dissolving a heat treated sample containing all the isomers in a heptane solution containing methyl margarate as reference standard.
The rubber blends have been immersed in acetone, heptane and toluene, respectively, for 23 hours.
We employ the heptane and toluene burning sequences of Figs.
Next week, the WPI team will perform a series of fire tests on the building's third floor, igniting pans of heptane, a liquid fuel that burns hot enough to simulate full burning within a compartment.
The systems with heptane showed several small maxima of considerable lower magnitude than the one of the TBA-water system.