Carvacrol is also called isothymol, a natural monoterpene derivative of cymene. It is a colorless to pale yellow liquid with a spicy odor as thymol. Carvacrol is naturally found in many essential oils especially in thyme oil. It is prepared by the sulfonation reaction of p-Cymene. With a special aroma, Carvacrol is widely used in fragrance formulation, oral product, spice, medicine etc. It’s used as a disinfectant and fungicide due to its capability of killing bacteria and intestinal parasites.