How do I identify pure eucalyptus oil

This article is based on a text from Merck's dictionary of goods

Eucalyptus oil (lat. Oleum eucalypti, French Essence d'eucalypte, engl. Eucalyptus oil).

There are over 500 species of the eucalyptus plant species. However, only the following types have commercial significance as essential oils:

  • Eucalyptus globulus, Labillardi√®re
  • Eucalyptus citriodora
  • Eucalyptus dives
  • Eucalyptus fructicetorum

Eucalyptus globulus


The main cultivation area has recently been China (3000-4000 tons of eucalyptus oil / year), previously it was Spain, Portugal, Brazil, Argentina. The eucalyptus trees grow back after they have been felled. Steam distillation of the wood gives a crude oil with a proportion of 60% 1,8-cineol and numerous cough-irritating aldehydes. By treatment with lye (lime or sodium hydroxide solution) and rectification - whereby the cough-irritating monoterpenes are separated - one obtains the eucalyptus oil (1,8-cineol content up to 90%). It forms a thin, colorless, pale greenish or pale yellow liquid with an aromatic smell, slightly reminiscent of camphor, a slight clockwise rotation and a specific gravity of 0.910-0.930.

Pure eucalyptus oil consists of 60 to 80% of what used to be Eucalyptol called cineole, and also contains small amounts of right pinene and possibly some camphene and fenchone. The aldehydes of butyric acid, caproic acid and valeric acid, which are irritating to coughing, are found in the crude oil. Another variety of Eucalyptus amygdalina differs from the above by its left-hand rotation, which is based on a content of phellandren. Eucalyptus oil is technically recommended as a solvent for resins for the production of paints and forms the starting material for the preparation of eucalyptol.


Eucalyptus globulus is a remedy according to the European Pharmacopoeia and is used for coughs, flu (influenza), hoarseness in the form of eucalyptus candies (or 3 drops of eucalyptus oil on a piece of sugar) or by inhalation (20 drops) of drops of eucalyptus oil added to a hot water bath rising vapors. It is also recommended for rheumatic complaints and muscle pain.

Ingredients and Antimicrobial Activity

The main compound in eucalyptus oil is 1,8-cineole (over 70%), furthermore 1-pinene (traces up to a maximum of 9%), 2-pinene (0-1.5%), limonene (0-12%), phellandrene (0-1.5%) included. Eucalyptus oil has antimicrobial activity against bacteria such as E. coli, Staphylococcus aureus, Streptococcus faecalis, Mycobacterium avium. It works against fungicides Candida tropicalis, Candida albicans, Aspergillus niger, Aspergillus aegypticus and other.

Similar fungicidal substances

Related oils with fungicidal properties from plants related to tea trees are:

  • Manuka oil
  • Tea tree oil
  • Kanuka oil

From the beehive:

Categories: Essential Oil | Drug