Thuja is a general term for trees of the genus Thuja, which belongs to the Cupressaceae or cypress family. This oil is used in pharmaceutical products because of its therapeutic properties. Apart from this, it also finds usage in toiletries, cosmetics, soaps and detergents perfume due to aromatic properties. Crushed Thuja leaves emit a pleasant smell which is somewhat like that of crushed Eucalyptus leaves, but sweeter. This smell comes from some of the components of its essential oil, predominantly some variants of thujone. The woody part of the plant is steam distilled which is widely used for perfumery compositions.