Digest Number 2066

[Guest guest]

At 05:15 AM 6/11/2005, you wrote:

 

>First question is about the Geraniol. Is this just plain ol' geranium

>EO, or is geraniol just one chemical constituant of geranium EO?

 

it's one of the chemical constituents...of geranium and many other eo's.

 

http://www.ibiblio.org/herbmed/eclectic/bpc1911/geraniol.html

 

 

GERANIOL.

 

Related entry:

<http://www.ibiblio.org/herbmed/eclectic/bpc1911/citral.html>Citral,

<http://www.ibiblio.org/herbmed/eclectic/bpc1911/linalool.html>Linalool,

Oil of rose, Palmarosa oil

 

C10H18O = 154.144.

Synonym.­Rhodinol.

 

Geraniol, C10H18O, is a primary alcohol, isomeric with linalool, and

constitutes the chief part of oil of rose and palmarosa oil; it also occurs

in appreciable quantities in geranium, citronella, lemon, and many other

oils. It is found both in the free state and in the form of esters, and may

be obtained by making use of its property of combining with calcium

chloride to form a crystalline compound, thus:­The oil is triturated with

an equal weight of anhydrous calcium chloride, and the mixture, which

becomes heated to 30° to 40°, is cooled in a desiccator. The solid mass

thus obtained is triturated with anhydrous ether or benzene, filtered under

pressure, washed with ether or benzene, and decomposed with water, the oily

liquid which separates washed with warm water, and finally distilled in a

current of steam. Geraniol occurs as a colourless, somewhat oily liquid,

having a sweet rose-like odour, and becoming oxidised on exposure to the

air. Specific gravity, 0.880 to 0.883; boiling-point, 230°; refractive

index, 1.4766; optically inactive. On oxidation, it is converted into its

aldehyde geranial or citral. By heating with acetic anhydride it yields the

acetic ester, CH3COOC10H17, which is a fragrant oil of specific gravity

0.917. Geraniol may be changed to linalool by heating with water to 200°

under pressure, whilst it may be obtained from linalool by heating the

latter for some time with acetic anhydride.

 

Use.­Geraniol is used largely in perfumery. It must be distinguished from

its aldehyde geranial, C10H16O, which is identical with citral.

 

 

 

 

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