FEMA 2795 CAS 9000-50-4
Introduction：Basic information about FEMA 2795 CAS 9000-50-4, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
FEMA 2795 Basic information
| Product Name: | FEMA 2795 |
| Synonyms: | Oils,oakmoss-resinoid;FEMA 2795;OAKMOSS;OAKMOSS ABSOLUTE RESIN;OAKMOSS CONCRETE BROWN MAROC;OAKMOSS CONCRETE GREEN MAROC;OAKMOSS OLIFFAC 924;OAKMOSS ABSOLUTE RESIN - FLAVOR & FRAGRANCE GRADE |
| CAS: | 9000-50-4 |
| MF: | |
| MW: | 0 |
| EINECS: | |
| Product Categories: | |
| Mol File: | Mol File |
FEMA 2795 Chemical Properties
| FEMA | 2795 | OAKMOSS ABSOLUTE (EVERNIA SPP.) |
| color | A green to brownish-green semi-solid or viscous liquid. The chief volatile constituents are α- and /β-thujone |
| Odor | at 100.00 %. sweet green quinoline grassy oily |
| Odor Type | green |
| Cosmetics Ingredients Functions | PERFUMING |
| EPA Substance Registry System | Oils, oakmoss-resinoid (9000-50-4) |
Safety Information
| TSCA | TSCA listed |
| toxicity | The actual oral LD50 in rats was reported as 2.9 (2.6-3.2 g/kg), while the acute dermal LD50 in rabbits exceeded 5 g/kg (Moreno, 1972). |
| Description | Various lichens belonging to the class Cryptogamia; they growunder cool, damp conditions on the trunks and branches of treessuch as oak and fir. The lichens are used to prepare resinoids andconcrete and absolute essences for a total yearly consumption ofapproximately 70 tons. E. prunastri, the true oak moss, grows on the trunks and branchesof oak trees. Like all ascolichens, the moss reproduces by fragmentationof soredia and grows by symbiosis yielding an erect,bushy, vegetative form. Other related lichen-E. furfuracea andUsnea barbata-that grow on spruces and firs are known by themore generic name of tree moss. Oak moss derivatives are lightgreen and exhibit a rich odor, while tree moss derivatives have agrayish-green color and a slight resinous odor. E. prunastri yieldsthe most valuable extraction products, while other tree mossesyield products of inferior quality. Oak moss is harvested mainlyin France, Yugoslavia, Italy, Morocco, and Hungary. The harvestedmoss is pressed into bails and shipped to the extractive sites. Thepart 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 becauseof the very low yields (0.07%). Usually oak moss concrete andoak moss absolute are steam distilled, preferably under reducedpressure. Main constituents of the ether-extracted concrete includeevernic 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. . |
| Chemical Properties | As stated above, the absolute is obtained by alcoholic extraction of the concrete. Extraction requires approximately 5hours. |
| Chemical Properties | 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 inMorocco. Their odors are different from those of the corresponding oakmoss products. The extracts and absolutes are used in perfumery for nuances and as a fixativeto give compositions a dry, sweet base note, for example, in fougére and chypreperfumes. Allergenic responses to oakmoss and tree moss products are probablycaused 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, forexample, ethyl hemmatomate, ethyl chlorohemmatomate, atranol, and chloroatranol. Methods to obtain oakmoss and treemoss products of low allergenic propertieshave been reported. Treemoss extracts may also contain constituentsthat possibly cause allergenic reactions. As tree moss grows on conifers, it may becontaminated with some conifer rosin. This rosin usually contains resinicacids (abietic acid and similar constituents), which are known to be allergenicsubstances. Tree moss products free of these resinic acids can be obtained bytreatment with selected solvents. |
| Physical properties | The absolute is a dark-green liquid. |
| Occurrence | Found in the lichen, E. prunastri (L.) Ach. (Fam. Usneaceae), which occurs on the trunks of oak trees (Guenther, 1952; Naves, 1974). |
| Uses | Oak moss absolute is an extract of oak moss. Extract made mainly from Evernia prunastri (oak moss) and Pseudevernia furfuracea (tree moss). Oak mossconcrete 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. |
| Definition | Extractives and their physically modified derivatives. It is a product which may contain resin acids and their esters, terpenes, and oxidation or polymerization products of these terpenes. (Evernia prunastri, Unseaceae). |
| Preparation | 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 andother monaryl derivatives of depsides. |
FEMA 2795 Preparation Products And Raw materials
| Raw materials | Ethanol-->FIR NEEDLE OIL, CANADIAN-->SPRUCE OIL |
