Oil of clove, also known as clove oil, is an essential oil extracted from the clove plant, Syzygium aromaticum. It has the CAS number 8000-34-8. Clove is often found in the aromatherapy section of health food stores, and is used in the flavoring of some medicines. Madagascar and Indonesia are the main producers of clove oil

The essential oil of the lemon-scented gum mainly consists of citronellal (80%), produced largely in Brazil and China. Unrefined oil from the lemon eucalyptus tree is used in perfumery, and a refined form of this oil is used in insect repellents, especially against mosquitoes. The refined oil’s citronellal content is turned into cis- and trans- isomers of p-menthane-3,8-diol (PMD), a process which occurs naturally as the eucalyptus leaves age. This refined oil, which includes related compounds from the essential corymbia citriodora.