Otto of rose

Ototoxicity Otto engine Otto ofRose Otto of rose Oturanic... 

Sometimes a skilled peifumei detects a sandalwood-musky note in authentic Bulgarian otto of rose. This note has been identified (11) as the trace iagredient, 7-methoxy-3,7-dimethyl-2-octanol [41890-92-0] (17), which has been commercially available for some time as Ossyrol (trademark of Bush, Boake, Aken Inc). This compound had never before been identified ia nature, but demonstrates how, sometimes, synthetic fragrance chemists can anticipate nature. 

Twenty-four years before its detection in nature PEA was first synthesized in 1876 (56) by reducing phenylacetaldehyde [122-78-1] with sodium amalgam. Then, in 1900, it was independently identified in otto of rose (57) and rose water (58). Subsequently, PEA has been identified in numerous flower oils such as ylang-ylang, narcissus, hyacinth, lily, neroH, and geranium as well as various other natural products like tea, tobacco, orange juice, beer, cigarette smoke, etc. 

Adulteration of Bulgarian otto of rose is so common as to render it a matter of the highest iniporlance to purchase this expeusivu product from dealers of tiqiuie. as the adult -iaiioii practised h-as Ijeen raised to... 

Anatolia, Hnngury, Hussia, and Spain also pvodnee a small amount of otto of rose, but apart fiom Jiulgaria, France i.s the ouly importaru rose-growing coiintrv. 

It is obvious fiotn the above llgufcs that the locality of productiou must he oonsidcrnd iii forming an opic iou as to the purity of otto of rose. 

Phenyl i-ibyl alcohol has recentlv beeii shown to he a normal constituent of otto of rose, but it appears to he mostly, if not entirely lust or dsstroveil by the Bulgarian method of rlisiillation. Nerol ifi also present in small amount as well as, probably, faroesol. a sesquiterpene alcohol CijH.,0, present in oil of cassie flowers. Eiigeuol, linalol, and nonyliu aldehyde arc also present in traces. 

Geraniol, Cj(,Hj-OH, is a constituent of many essential oils, both in the free state and in the form of esters. It is present to a very large extent in palmarosa oil, ginger-grass oil, and citronella oil, principally in the free state, and in geranium oil, to some extent in the free state, but principally in the form of esters. It is also an important constituent of otto of rose, and is present in numerous other oils belonging to the most distantly related groups. 

Citronellol occurs so frequently associated -with geraniol, and is. -absolutely necessary as an ingredient of artificial otto of rose and similar... 

Another separation of a mixture of alcohols is often necessary, namely, that of geraniol, citronellol, and phenyl-ethyl-alcohol, all of which occur in admixture in artificial otto of rose. In this case advantage may be taken of the fact that phenyl-ethyl alcohol is easily soluble in 30 per cent, alcohol, which is not the case with geraniol or citronellol. 

Phenyl-ethyl alcohol, CgH. CHj. CHjOH, is the next highest homologue of the benzyl alcohol series. It is found naturally in rose -and neroli oils but as it is very soluble in water, it practically disappears from the distilled otto of rose and is dissolved in the rose water. Hence otto of rose with its beautiful perfume does not truly represent the odour of the rose. By the use of various isolated and synthetic bodies an artificial otto can be prepared which more closely resembles the rose odour than does the natural otto itself. But it is doubtful whether any really good artificial otto of rose can be prepared without some natural otto as its basis. 

The odour of the ester varies slightly, according as it is made from the dextro-rotatory or the laevo-rotatory variety of the alcohol. That of the former is rather fuller and deeper in its rose odour than that of the latter. Both esters blend excellently with the corresponding citronellols, and are very useful in preparing synthetic otto of rose. 

To 10 c.c. of the oil (otto of rose or rose-geranium oil) 10 c.c. of formic acid 100 per cent, (specific gravity 1 22) is added, and the mixture gently boiled under a reflux condenser for one hour. The mixture is cooled, 100 c.c. of water added, and the whole transferred to a separator. The aqueous layer is rejected, and the oil washed with successive quantities of water as in the acetylation process. The formylated oil is dried with anhydrous sodium sulphate, and about 2 grams neutralised and saponified with alcoholic potash in the usual manner. The percentage of citronellol is then calculated from the following formula —... 

Pure PEA possesses an extremely mild roselike odor. Commercial grades of PEA which are >99% pure vary in odor because of the impurities present which depend on the method of manufacture. The common impurities are benzaldehyde [100-52-7]y benzylacetone [2550-26-7]y 1-phenyl-2-propanol [14898-87-4]y and phenylacetaldehyde. It is claimed that the presence of phenylacetaldehyde imparts a honeylike by-odor resembling the odor of dried rose leaves with a faint suggestion of otto of rose which has a honey by-note. However, the presence of phenylacetaldehyde above 0.01% greatly distorts the delicate rose odor of PEA. 

Lmalool [78-70-6] - [PERFUMES] (Vol 18) - [TERPENOIDS] (Vol 23) -in anise star oil [OILS, ESSENTIAL] (Vol 17) -aroma chemical [PERFUMES] (Vol 18) -in Bergamot oil [OILS, ESSENTIAL] (Vol 17) -in caraway oil [OILS, ESSENTIAL] (Vol 17) -m Geranium Bourbon oil [OILS, ESSENTIAL] (Vol 17) -in jasmin oil [OILS, ESSENTIAL] (Vol 17) -in lavender [OILS, ESSENTIAL] (Vol 17) -in lavender [OILS, ESSENTIAL] (Vol 17) -in lime oil [OILS, ESSENTIAL] (Vol 17) -odor of [FLAVORCHARACTERIZATION] (Vol 11) -in oilbanum [OILS, ESSENTIAL] (Vol 17) -in orange oil [OILS, ESSENTIAL] (Vol 17) -m osmanthus flowers [OILS, ESSENTIAL] (Vol 17) -in otto of rose [OILS, ESSENTIAL] (Vol 17) -in sweet basil oil [OILS, ESSENTIAL] (Vol 17) -in wine [WINE] (Supplement)... 

Rose (attar of rose, otto of rose) Rosa damascena, gallica, R. alba, and R. R. centifolia (Rosaceae) fresh flowers 0.02-0.03... 

Typical aromatic alcohols are shown in Figure 6. Phenylethyl alcohol is the most important member of this family. It is the main constituent of French rose and is also present in Otto of rose. Phenylethyl alcohol has a heavy, sweet odor reminiscent of rose petals. It blends well with other floral odors and is widely used in many floral fragrances. Phenylethyl alcohol is one of the chemical pillars of perfumery because, in addition to its fine odor qualities, it is relatively inexpensive and readily available. 

SYNS ATTARROSED ATTARofROSE ESSENCE of ROSE OIL OF ROSE OIL OF ROSE BLOSSOM OIL OF ROSE BULGARIAN OTTO ROSE OTTO of ROSE ROSE de GR. SSE ROSE de MAI ROSEN OEL (GERMAN) ROSENOL ROSE OIL BULGARIAN ROSE OTTO... 

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