Producing a uniform oil of pale yellow or pale olive yellow liquid, usually crystal clear, free from dirt and water. The odor is somewhat different from that of the Reunion geranium oil in that it is lighter, more rosy leafy, less minty and usually free from the sulfide, topnotes The herbaceous and powerful tone is subdued in the Algerian oil and the rich, sweet rosy dryout backnote is more pronounced. There are no traces of earthy or potato like notes. tsca definition 2008: extractives and their physically modified derivatives. pelargonium graveolens or pelargonium radula, geraniaceae.