Chemical Property of FEMA 2795
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Chemical Property:
- Purity/Quality:
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99%, *data from raw suppliers
Safty Information:
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- Hazard Codes:
- MSDS Files:
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Useful:
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Description
Various lichens belonging to the class Cryptogamia; they grow
under cool, damp conditions on the trunks and branches of trees
such as oak and fir. The lichens are used to prepare resinoids and
concrete and absolute essences for a total yearly consumption of
approximately 70 tons.E. prunastri, the true oak moss, grows on the trunks and branches
of oak trees. Like all ascolichens, the moss reproduces by fragmentation
of soredia and grows by symbiosis yielding an erect,
bushy, vegetative form. Other related lichen-E. furfuracea and
Usnea barbata-that grow on spruces and firs are known by the
more generic name of tree moss. Oak moss derivatives are light
green and exhibit a rich odor, while tree moss derivatives have a
grayish-green color and a slight resinous odor. E. prunastri yields
the most valuable extraction products, while other tree mosses
yield products of inferior quality. Oak moss is harvested mainly
in France, Yugoslavia, Italy, Morocco, and Hungary. The harvested
moss is pressed into bails and shipped to the extractive sites. The
part used is the lichen. Oak moss has a delicate, pleasant, green,
moss-like odor.
An essential oil can be obtained by steam distillation of the lichen;
however, this product is of little commercial importance because
of the very low yields (0.07%). Usually oak moss concrete and
oak moss absolute are steam distilled, preferably under reduced
pressure. Main constituents of the ether-extracted concrete include
evernic acid, orcinol, phenols, acids (formic, acetic, stearic, palmitic,
and oleic), α- and P-thujone, camphor, bomeol, cineol, naphthalene,
ketones, terpene alcohols, and traces of vanillin..
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Physical properties
The absolute is a dark-green liquid.
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Uses
Oak moss absolute is an extract of oak moss. Extract made mainly from Evernia prunastri (oak moss) and Pseudevernia furfuracea (tree moss). Oak moss
concrete is prepared by hydrocarbon solvent extraction of the lichen Evernia Prunastri, collected mainly from oak trees in Yugoslavia,
France, Italy, Corsica, Morocco, Hungary, and various central European countries. Contains atranorin, evernic acid and usnic acid.
