Eucalyptus Australiana Oil

#### Eucalyptus Australiana. Of the almost 700 known **Eucalyptus **species, several hundred have been subject to thorough investigation, including experimental distillation of their essential oils. But only a small number of the species have proved interesting with regard to their oils. This book will deal with about one dozen of the eucalyptus oils, and the author hopes that this selection will cover all oils which are of interest to those in the fields of perfumery and flavor, and which are produced regularly, or made available upon demand. The oil of **Eucalyptus**** ****Australiana**** **exists in several "forms" apart from the so-called "type" tree. We shall describe only the "type" and the variety called "B". The two oils are produced in sizeable quantities in southern Australia, and the trees have lately been introduced in the Union of South Africa. The oils are produced locally by steam-distillation of fresh or semi-dry leaf material. Both oils are colorless or pale yellow, mobile liquids. - **Eucalyptus Australiana **"type" is a **Cineole **type of oil, slightly different from the common "pharmaceutical" eucalyptus oils (see also Eucalyptus Globulus), however, it has a peculiar sweet dryout, and has less of the unpleasant "low-aldehydic" topnote, characteristic of most of the "pharmaceutical" cineole-type oils. - **Eucalyptus Australiana**, variety "B" is also called Eucalyptus Phellandra. It is a phelland rene-cineole type of oil, not suitable for pharmaceutical purposes, but of some interest to perfumery because of its great masking effect and low cost. This oil is produced on a large scale in Australia and on a small scale in Belgian Congo. Its odor is fresh, very power full peppery-camphoraceous, and it has a pleasant dryout but little or no fixative effect. These two oils are both produced in large quantities, i.e. from 50 to 200 tons per year, particularly the latter which is used in the mining industry and as a solvent or hardener in paints and lacquers. It finds some use as a perfume material in the so-called industrial perfumes.