Ginger oil and ginger oleoresin are produced from the ginger plant Zingiber officinale Roscoe (Zingiberaceae). Ginger oil is produced by steamdistillation of dried, ground rhizomes. It is a light yellow to yellow liquid with the aromatic, persistent odor of ginger, but lacking the pungency usually associated with ginger.The citrus note of ginger oil is produced by citral. d2525 0.871–0.882; n20D 1.4880–1.4940; α20D ?45 ° to ?28 °; saponification number: max. 20; soluble in ethanol, solutions are usually turbid. The major components of the oil are β-sesquiphellandrene and zingiberene.