Terpeneless Petitgrain Oil

#### Petitgrain Oil, terpeneless. This oil is prepared from **Petitgrain**** ****"Paraguay"**** ****Oil**** **(see following monograph) or, more rarely, from **Petitgrain Bigarade Oil**. The two natural oils do not produce identical terpeneless oils. The deterpenation may be a "topping" of the oil by simple vacuum distillation and removal of only the light, low-boiling and harsh-smelling monoterpenes, or it may be a total deterpenation by one of the methods described in Part One of this work (see **Terpeneless**** ****Oils**). The most common type is the one obtained from Paraguay petitgrain oil by total vacuum distillation. This yields a practically colorless oil with a loss of about 18 to *35% *by weight, calculated upon a good, commercial grade of Paraguay petitgrain oil. Since the production of a deterpenized perfume oil is often a question of esthetics, rather than a question of physical specifications, there are countless types of terpeneless petitgrain oil. The perfumer who selects the fractions to be used in the bulked terpeneless oil from the vacuum distillation, will decide according to his personal experience which of the fractions should be included. This selection is rarely, if ever, done by instrumental specifications and data. The typical "bitter" note of petitgrain should remain perceptible in the deterpenized oil, and it is quite possible that this note is partly due to terpenic compounds. The deterpenized oil will, however, mainly consist of linalyl acetate, methyl anthranilate, linalool, traces of geraniol, nerol, esters of same, etc. **Terpeneless Petitgrain Oil **is one of the most indispensible materials in the creation of neroli notes, or in the "creation" or duplication of neroli oils (artificial). For this purpose it is particularly important that the starting material has been a good petitgrain oil, and a bigarade oil is preferable, by far. Ironically enough, in neroli oil it is again the small amounts of certain terpenes which impart the characteristic topnote of this expensive oil. Terpeneless petitgrain oil is furthermore used in citrus colognes, and as a fresh-floral blender in numerous other perfume types. It is an excellent modifier-freshener in Oriental perfume bases, and it is actually used so widely that it would be misleading to point out specific uses of this versatile raw material. It is very stable and offers accordingly an advantage over the natural petitgrain oil. The latter is often used as such in soap, while the terpeneless oil shows inferior power when incorporated in a soap. The greater solubility of the terpeneless oil places it immediately among the useful and versatile materials for alcoholic lotions, aerosols, etc. **Terpeneless Petitgrain Oil **finds some application in flavors where it lends sweetness and natural "fond" in peach and apricot, gooseberry, black- currant, etc. and as a modifier in ginger ale flavors, honey-candy flavors, etc.