There are around 700 different species of Eucalyptus in the world, of which at least 500 produceatypeofessential oil. It is produced by steam distillation from the leaves of Eucalyptus species (E. cinerea F. Muell., E. baueriana F. Muell., E. smithii R. T. Baker, E. bridgesiana R. T. Baker, E. microtheca F. Muell., E. foecunda Schau., E. pulverulenta Sims, E. propinqua Deane and Maiden, E. erythrocorys F. Muell.) etc. They are widely used in the preparation of liniments, inhalants, cough syrups, ointments, toothpaste and also as pharmaceutical flavors. The European Pharmacopoeia monograph for Eucalyptus oil sports a chromatographic profile: 1,8-cineole (eucalyptol; not less than70%), limonene (4- 12%), α-pinene (2-8%), α- phellandrene (less than 1.5%), β-pinene (less than 0.5%), camphor (less than 0.1%)