Eucalyptus leaf oil, also known as Melaleuca and eucalyptus, is a colorless oily liquid extracted from eucalyptus oil, Yushu oil, bay leaf oil. It is widely used in medicine, preparation of toothpaste and essence. Colorless or yellowish liquid.

It has a unique cool and sharp eucalyptus leaf aroma, with a bit of  smell and some medicinal gas. It has a spicy and cool feeling. The aroma is strong but not lasting. It has certain anti mildew and antiseptic effect. Almost insoluble in water, soluble in ethanol, anhydrous ethanol, oil and fat. The flash point is 50 ºC.