Eucalyptole

Ciaeole or eucalyptol [470-82-6] is the principal component. 4-Methyl-2-pentanol [108-11-2],... 

Rectified oils have been redistilled to improve a particular property or characteristic, such as flavor or aroma. Eor example, natural oil of peppermint is frequently rectified to remove dimethyl sulfide, which has a powerful and objectionable cooked vegetable note deleterious to the use of the oil in cmme de menthe Hqueurs. Distillation is also used to remove psoralens, which are harmful photosensitizing agents present in natural bergamot oil. Color may be removed, eg, from cassia oil, by vacuum steam distillation. A desirable component, such as 1,8-cineole (eucalyptol) 85% in eucalyptus oil, may be... 

Active agents vary according to use. For controlling bad breath, 2iac salts, sodium lauryl sulfate, and flavors are used. To destroy oral microorganisms, chlorhexidine, cetylpyridinium chloride [123-03-5] and ben2alkonium chloride [68391-01-5] are valuable. Essential oils, such as thymol [89-83-8] eucalyptol [470-82-6] menthol, and methyl salicylate [119-36-8] reduce plaque-related gingivitis (see Oils, essential). Sodium fluoride aids ia caries coatrol. 

The oil ooDtaiiiB about d per cent, ot geranyl acetate, pineue, cymene, Iree gerauiol. eucalyptol, traces of pbunol fcarvaerol ), and au aldehyde whieh is probably cuminic aldehyde. 

The second-hour s distillate and ihe third-hour s distillate are quite similar to Cuuh other. They contain about )i0 per cent, of eucalyptol, toifcthei with the less desii-able constituents of the oil. 

Thia true is fcha Bastard Stringy Bark of New Soulh Wales. Tha oil eontaiua eucalyptol, piperitone, and eudeamol, with a large amoont of phellandrene, and haa the followuig charaetera —... 

This tree is kuown io New South Wales as Buotted ftum The oil nontaina pinene and eucalyptol, and has Ihe followinM eliaruccera -... 

This tree is a Black Peppermint of New South Wales. Us oil uou-laina piucue, pbellaudrenc. eucalyptol, and aromadendrene. It bas the foliow iug chartkcters —... 

It coDcams eucalyptol, aromadeodrcDC, aromadcndral, and an alco This tree ia known in New South Walea as a Bastard Mahoga... 

This body, CjoHjgO, has been described under several names, the best known being that now usually adopted, viz. cineol also cajuputol (from its occurrence in oil of cajuput) and eucalyptol (from its occurrence in oil of eucalyptus). It is found in nature in very large quantities in the above-mentioned oils, as well as in many others, notably wormseed, lavender (English), and spike-lavender oils. It results also by the... 

According to all reliable observations, the oxygen atom in cineol does not possess alcoholic, ketonic, aldehydic, or acid functions. Apparently it is quite indifferent, which accounts for the isolated nature, chemically speaking, of the compound. In commerce, this body finds considerable employment under its name, eucalyptol. 

The above method is applicable directly to all oils containing above 50 per cent, of cineol in oils containing lower proportions of cineol the precipitate is not solid enough to permit convenient handling and if the cineol-content drops below 25 per cent, the separation of cineol arsenate is not quantitative. It was found that the addition of an equal volume of eucalyptol to such oils (i.e. mixing 5 c.c. of the oil with 5 c.c. of eucalyptol) successfully overcomes this difficulty it then only becomes necessary to subtract from the volume of cineol, as observed in the neck of the flask, 5 c.c., and to multiply the difference by 10, in order to obtain the percentage of cineol in the oil. 

Self-Test F.3B Use the information in Self-Test F.lA to find the relative amounts of C, H, and O atoms present in eucalyptol. 

Sfi f-Tfst F.4A Use the molar composition of eucalyptol calculated in Self-Test F.3B to determine its empirical formula. 

Self-Test 4.11A The oil produced from eucalyptus leaves contains the volatile organic compound eucalyptol. At 190.°C and 60.0 Torr, a sample of eucalyptol vapor had a density of 0.320 g-L . Calculate the molar mass of eucalyptol. 

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