OILS OF LIBROCEDRUS DECURRENS
Librocedrus decurrens, a tree found in California and known as the Incense
cedar, yields a leaf and twig oil and a bark oil. The leaf and twig oil has the
following characters:
Specific gravity 0,865
to 0,874
Optical rotation - 3°20' to + 36,68°
Ester value 18,5 to 27,8
“ “ (after acetylation) 28'6 to
48,2
It contains furfural, α-pinene, sylvestrene,
limonene, dipentene, borneol, esters, and a sesquiterpene, which has been named
librocedrene, having the following characters:
Specific gravity at 20° .................. 0,929
Boiling-point .............................. 270°
(approximate)
Refractive index ..........................
1,4994
Optical rotation ............................+
6,4°
The bark oil has the following characters :
Specific gravity .........................0,862
Refractive index ..................... 1,4716 at 15°
Optical rotation ........................+ 1,1°
Ester value ..................................3,2
“ “ (after acetylation) ......9,5
The oil contains furfural, α-pinene,
dipentene, and borneol.
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