| Aromatic plants possess odorous volatile substances that occur as oil, gum exudate, balsam and natural resin in one or a lot of components, namely, root, wood, bark, stem, foliage, flower and fruit. The
characteristic aroma is due to a variety of advanced chemical compounds. The term oil is concomitant to fragrance or perfumes as a result of these fragrances are oily in nature and they represent the
essence or the active constituents of the plants. they referred to as volatile or ethereal oils as they evaporate when exposed to air at standard temperatures. Essential oils are extremely concentrated, low volume, high value products.