Latin Name: Eucalyptus Globulus Part of the Plant Used: Leaves and Twigs Origin: China Extraction Method: Steam Distillation. Eucalyptus essential oil is a concentrated liquid containing volatile aromatic compounds from the eucalyptus globulus tree. It is usually distilled, sometimes expressed or extracted with solvent. Eucalyptus essential oil is said to be antibacterial, disinfectant and analgesic. It has been used to relieve coughs, colds, and other respiratory problems. It relieves muscle and joint pain, and helps heal wounds, burns, ulcers and insect bites. In aromatherapy, eucalyptus is said to promote activity, vitality and energy.