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Limonene is a chiral molecule, and biological sources produce one enantiomer: the principal industrial source, citrus fruit, contains (+)-limonene (d-limonene), which is the -enantiomer. [1] (+)-Limonene is obtained commercially from citrus fruits through two primary methods: centrifugal separation or steam distillation.
Common solvents used include D-limonene, aliphatic alkanes, and acetone. Heptane is also used as an adhesive remover by stamp collectors. Since 1974, the United States Postal Service has issued self-adhesive stamps that some collectors find difficult to separate from envelopes via the traditional method of soaking in water.
The major use of d-limonene is as a precursor to S-(+)-carvone. The large scale availability of orange rinds, a byproduct in the production of orange juice, has made limonene cheaply available, and synthetic carvone correspondingly inexpensively prepared. [15] The biosynthesis of carvone is by oxidation of limonene.
It is a common alternative to traditional fumigation methods due to its lower toxicity and the convenience of local chemical injections. Orange oil treatments can be used for termite control. [8] Research also indicates that the d-limonene in orange oil can be useful in exterminating drywood termites (Incisitermes). [8]
Consists of 90% d-Limonene. Used as a fragrance, in cleaning products and in flavoring foods. Oregano oil, contains thymol and carvacrol; Orris oil is extracted from the roots of the Florentine iris (Iris florentina), Iris germanica and Iris pallida. It is used as a flavouring agent, in perfume, and medicinally. [23] Palo Santo
Some collectors of used stamps have discovered that although not readily removable by water, the self-adhesives can be removed with Bestine (a heptane solvent), benzine (petroleum ether), or a natural based citrus solvent containing d-limonene (e.g., Pure Citrus Orange is an air freshener product that works for this purpose). [7]
Solvent strippers may also have formulations with limonene (obtained from orange peels) (or other terpene solvents). Nitromethane is another commonly used solvent. Dimethyl sulfoxide is a less toxic alternative solvent used in some formulations. Unfortunately, these alternative stripping formulas are less effective compared to those based on ...
D-Limonene, a terpene. Solvents in a diverse class of natural substances called terpenes are obtained by extraction from certain parts of plants. All terpenes are structurally presented as multiples of isoprene with the gross formula (C 5 H 8) n. D-limonene, a monoterpene, is one of the best known solvents in this class, as is turpentine.
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