FEMA 2795

FEMA 2795 속성

FEMA 2795 C화학적 특성, 용도, 생산

개요

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.
.

화학적 성질

Tree moss concretes and absolutes are prepared from Pseudevernia furfuracea (L.) Zopf (syn. Evernia furfuracea (L.) Mann; Parmelia furfuracea (L.) Arch.), a lichen growing on barks of Pinaceae, for example, on Cedrus species in Morocco. Their odors are different from those of the corresponding oakmoss products.
The extracts and absolutes are used in perfumery for nuances and as a fixative to give compositions a dry, sweet base note, for example, in fougére and chypre perfumes. Allergenic responses to oakmoss and tree moss products are probably caused by aromatic aldehydes such as atranorin and chloroatranorin and the corresponding products formed during the workup process as a result of transesterification and decarboxylation reactions, for example, ethyl hemmatomate, ethyl chlorohemmatomate, atranol, and chloroatranol.
Methods to obtain oakmoss and treemoss products of low allergenic properties have been reported. Treemoss extracts may also contain constituents that possibly cause allergenic reactions. As tree moss grows on conifers, it may be contaminated with some conifer rosin. This rosin usually contains resinic acids (abietic acid and similar constituents), which are known to be allergenic substances. Tree moss products free of these resinic acids can be obtained by treatment with selected solvents.

물리적 성질

The absolute is a dark-green liquid.

출처

Found in the lichen, E. prunastri (L.) Ach. (Fam. Usneaceae), which occurs on the trunks of oak trees (Guenther, 1952; Naves, 1974).

용도

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.

제조 방법

By solvent extraction of E. prunastri; the solvent is evaporated and removed, usually under vacuum, and the resultant product is normally dispersed in benzyl benzoate or a similar diluent to facilitate handling. Commercially available oakmoss preparations are frequently compounded products (Chatelain, 1953).

Essential oil composition

Extract of lichen contains camphor, α- and β-thujone, depsides, orcinol, sparassol, atranol, divarine and other monaryl derivatives of depsides.

FEMA 2795 준비 용품 및 원자재

원자재

준비 용품

FEMA 2795 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Shaanxi Dideu Medichem Co. Ltd	18192627656	1012@dideu.com	China	3422	58
Hebei Yanxi Chemical Co., Ltd.	+8617531190177	peter@yan-xi.com	China	5993	58
Career Henan Chemica Co	+86-0371-86658258 15093356674;	laboratory@coreychem.com	China	30255	58
ANHUI WITOP BIOTECH CO., LTD	+8615255079626	eric@witopchemical.com	China	23556	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	29220	58
LUYUNJIA CHEMISTRY XIAMEN LIMITED	+86-592-5360779 +86-13055435203		China	5996	58
Hebei Kingfiner Technology Development Co.Ltd	+86-15532196582 +86-15373005021	lisa@yibangte.com	China	2987	58
Shenzhen Sendi Biotechnology Co.Ltd.	0755-23311925 18102838259	Abel@chembj.com	CHINA	3191	55
Shenzhen Sendi Biological Technology Co., Ltd.	18124570582 TEL：0755-23574479 2355327139	siliao02@yccreate.com	China	6120	58
Wuhan Runzeweiye Technology Co., Ltd.	027-50779735 15172337137	runzeweiye999@163.com	China	734	55

FEMA 2795 관련 검색: