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(organic chemistry)
C10H16 A terpene with a lemon odor that is optically active and is found in oils from citrus fruits and in oils from peppermint and spearmint; a colorless, water-insoluble liquid that boils at 176°C.



1-methy1–4-isopropenylcyclohexene-1, a terpene hydrocarbon; colorless liquid with a lemony odor. Oxidizes readily in air. Boiling point, 176°C; density, 0.8411 g/cm3 at 20°C. Limonene exists in two optically active (+) and (-) forms, as well as a (±)-form (racemic mixture) commonly called dipentene.

Limonene is a component of many essential oils. For example, citrus oils contain mainly (+)-limonene (approximately 90 percent), which may be extracted by rectification processes. Dipentene is also found in turpentine. Limonene is used as an odoriferous substance in perfume and cosmetics manufacture.

References in periodicals archive ?
The bioassays were carried out in 50 mL Erlenmeyer flask by adding 20 ml of the sterile YM medium with adjusted pH and d-limonene (2%, v/v).
The 7 chemicals were ethyl propionate, ethyl butyrate, ethyl 2-methylbutyrate, D-limonene, benzoic acid, methyl anthranilate, and dimethyl anthranilate.
D-Limonene mechanistic data and risk assessment: absolute species-specific cytotoxicity, enhanced cell proliferation, and tumor promotion.
Sorensen and Weschler (2002) studied the reaction between ozone and d-limonene with a hypothetical product and surface deposition of ozone in a 2D CFD domain.
For reference, the odor threshold of d-limonene is 440 ppb (Devos et al.
Q: What experience do you have with d-limonene in the treatment of GERD?
The sorbent bed breakthrough curve described by the model matched well with corresponding experimental data for the VOCs tested, including toluene, decane, hexane, butanone, iso-butonal, tetracholorothylene, and d-limonene under relatively high concentration levels (ppm).
Crowell PL, Chang RR, Ren Z, Elson CE, Gould MN (1991) Selective inhibition of isoprenylation of 21-26-kDa proteins by the anticarcinogen d-Limonene and its metabolites.
The VertecBio DLR solvent has the potential to replace the use of d-limonene.
The composition is comprised of an active agent; a non-functional perfume component; and a FPC mixture comprising isononyl acetate and a second FPC selected from the group consisting of dihydro myrcenol, linalool, geraniol, d-limonene, benzyl acetate, isopropyl mystristate, and combinations thereof, wherein said FPC mixture is present in an amount from about 15% to about 95%, by weight of said composition.
Tests were conducted for VOCs including hexane, decane, toluene, tetrachloroethylene, 2-butanone, isobutanol, and D-limonene.