A chemical agent, menthol is extracted from the leaves and stems of Mentha haplocalyx. Its white crystal, molecular formula c10h2o, is the main component of the essential oil of menthol and menthol. In the world, India is the main natural mint producer. Menthol and racemic menthol can be used as toothpaste, perfume, beverages and sweets. In medicine, it can be used as an irritant, acting on the skin or mucous membrane, having the effect of cooling and relieving itching; in internal use, it can be used as an anti wind medicine, for headache and nose; pharynx; laryngitis, etc. Its esters are used in perfumes and medicines.<br>
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