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(sī'kləhĕk`sān), C6H12, colorless liquid hydrocarbon. It is a cyclic alkane that melts at 6°C; and boils at 81°C;. It is nearly insoluble in water. Cyclohexane is found naturally to some extent in petroleum but is prepared commercially by catalytic hydrogenation of benzene. It is widely used as a solvent and in making certain compounds used in the preparation of nylon.



a saturated alicyclic hydrocarbon. A cycloalkane, cyclohexane has the structural formula

It is a colorless liquid with a characteristic odor. It has a melting point of 6.55°C, a boiling point of 80.74°C, and a density of 0.778 g/cm3 at 20°C. Insoluble in water, cyclohexane is miscible with ether, acetone, and benzene. It has two possible conformations —the “boat” and “chair” forms; the latter predominates at normal temperatures.

Cyclohexane is a component of virtually all petroleums, but it is present only in small amounts. It is therefore produced in industry mainly by the catalytic hydrogenation of benzene. It is used as a raw material for the production of cyclohexanol and cyclohexanone (by oxidation with oxygen), nitrocyclohexane (by the action of 30-percent nitric acid or nitrogen dioxide), and cyclohexanone oxime (by nitrosation using NOCl); all of these substances are intermediates in the production of caprolactam and adipic acid by catalytic oxidation. Both caprolactam and adipic acid are used in the production of polyamides.


(organic chemistry)
C6H12 A colorless liquid that is a cyclic hydrocarbon synthesized by hydrogenation of benzene; used in organic synthesis. Also known as hexamethylene.
References in periodicals archive ?
e lipase and phospholipase while diisopropyl ether and cyclohexane were found to be moderator solvents with respect to activation of enzymes.
Browse 118 market data tables and 33 figures spread through 218 pages and in-depth TOC on "Benzene Market & Its Derivatives (Ethylbenzene, Cumene, Cyclohexane, Nitrobenzene, and Alkylbenzene) Market by Application & Geography Trends and Forecasts to 2018"
A mixture of acetone, petroleum ether, and cyclohexane (1:1:1, v/v/v) was added, and the mixture was allowed to sit for at least 10 hours.
One milliliter of spectral grade cyclohexane was added to the 50 megalopae and 1 ml of spectral grade cyclohexane was added to the water that was removed.
Cyclohexane industry supply scenario in Argentina from 2005 to 2019, comprising plant capacity growth and installed plant capacity by production process and technology
In the current work this method was used to measure the solubility and diffusivity in polyethylene of water and of 1-octene and cyclohexane at different water activities and low pressure.
The topics include preparing and characterizing different syntactic foams filled with hollow microspheres, side-chain liquid-crystalline polysiloxanes containing cholesteric cyclohexane, a easy method for improving the process of preparing porous anodic aluminum oxide film, and the influence of particle size on the rheology of magneto-rheological elastomers.
Lone oxygen atoms then repeatedly attack and latch onto a hexagon-shaped carbon molecule, cyclohexane, until the ring breaks open, forming adipic acid.
Figure shows that cyclohexane requires the minimum energy among the other working fluids.
Tracer ID Ortho-perfluoro, dicyclohexane o-PDCH Perfluoro, methyl, cyclohexane PMCH Perfluoro, methyl, cyclopentane PMCP Iso-perfluoro, propyl, cyclohexane i-PPCH Perfluoro, trimethyl, cyclohexane PTCH Perfluoro, dimethyl, cyclobutane PDCB Tracer Location Ortho-perfluoro, dicyclohexane Indoor atrium Perfluoro, methyl, cyclohexane North designated smoking area Perfluoro, methyl, cyclopentane South designated smoking area Iso-perfluoro, propyl, cyclohexane North unofficial Smoking area Perfluoro, trimethyl, cyclohexane South unofficial smoking area #1-outdoor seating Perfluoro, dimethyl, cyclobutane South unofficial smoking area #2-north wing exit Release Normalized Rate Rate (*) Tracer (nL/min) Ortho-perfluoro, dicyclohexane 1.
The list details 626 chemicals harmful to human health and provides alternatives, such as cyclohexane and heptane, safer solvents similar to benzene.
6 methyl, smoking area cyclohexane Perfluoro, PMCP South designated 11.