ESSENTIAL OILS OF LIBROCEDRUS DECURRENS

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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