Eucalyptus is primarily known for its eucalyptol (monoterpenoid), also known as cineole.
Eucalyptol is the major component of the essential oil derived from Eucalyptus globulus leaves. It gives eucalyptus its characteristic scent and has several potential therapeutic effects. Eucalyptol is known for its expectorant and decongestant properties, making it commonly used in products for respiratory conditions such as cough, cold, and sinus congestion.
In addition to eucalyptol, the essential oil of Eucalyptus globulus contains other bioactive compounds, including alpha-pinene, limonene, and camphene, which contribute to its overall fragrance and potential benefits.