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(organic chemistry)
Any of the isomeric hydrocarbons metacymene, paracymene, and orthocymene; paracymene is a liquid that is colorless, has a pleasant odor, and is made from oil of cumin or oil of wild thyme.



(also methyl-isopropyl-benzene), an aromatic hydrocarbon having the structural formula

The meta-, ortho-, and para-isomers of cymene are known; the most important is para-cymene, which is a component of turpentine and many essential oils, including cumin oil and eucalyptus oil. A colorless liquid with a characteristic odor, para-cymene has a boiling point of 177.1°C, a melting point of –67.9°C, and a density of 0.857 g/cm3 at 20°C. Cymene is insoluble in water, but it is miscible with many organic solvents.

The similarity of the carbon skeleton of para-cymene with the skeletons of many cyclic terpenes is a result of their common origin. Thus, para-cymene may be produced by the pyrolysis of α-pinene, the dehydrogenation of limonene, or the heating of camphor with P2O5. In the chemical industry, para-cymene is produced from sulfite turpentine and is used as a raw material and a solvent.

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Due to low solubility of EOLs thymol and p-cymene in water, they were dissolved in dimethyl sulfoxide (DMSO), in which the final concentration never exceeded 0.
Fraction F1 contained mainly phenolic monoterpene carvacrol with monoterpene hydrocarbons p-Cymene and T-Terpinene which together represented a synergistic combination and enhanced antibacterial activity as also reported by Fournomiti et al.
It should be noted that the contribution of p-cymene and 1-octacosanol to the cytotoxicity of the mixture was negligible (Figure 2(b)).
The present study is focused on the investigation of the antioxidant effectiveness and chelating activity of S-(+)-carvone, R-(-)-carvone, p- cumenol, cuminyl alcohol, cuminal, 4- methoxycumene, p-cymene, gamma-terpinene and thymol using a variety of assays.
were [gamma]-terpinene (253), limonene (64), and p-cymene (308) using sporulated surface culture (Scheme 107).
Major components of the essential oil of straw components obviously cleared that limonene and decanal decreased, but y-terpinene and p-cymene increased by foliar spraying, whereas control plants showed the highest percent of limonene and decanal and also gave the lowest of [gamma]-terpinene and p-cymene contents.
Previously, we have demonstrated the analgesic-like property of p-cymene in rodents.
5%), p-cymene (purity 99%), [gamma]-terpinene (purity [greater than or equal to]97.