Ajwain oil is eracted by steam distillation of the crushed seeds of ajwain. This valued considerably in medicine on account of the presence of thymol. The oil of ajwain is an almost colourless to brownish liquid with characteristic odour and a sharp hot taste. Ajwain is called omam in the southern part of india.
The United States is a principal producer of Peppermint, and the largest markets for Peppermint Oil are manufacturers of chewing gum, toothpaste, mouthwash, and pharmaceuticals.
It is fresh, floral, sweet, somewhat similar to geranium oil.the oil is extensively used as a substitute for attar of rose and as a base for perfumes and cosmetics. As a soap perfume, it is used for imparting a pronounced and lasting rose note.
The essential oil of davana is widely used in food flavouring and perfumery industries. It is extensively used in flavorings of food, liquor and pastry industries besides perfumery.