Peppermint oil is obtained from mentha arvensis :

The major component is menthol and have local anesthetic and counter irritant qualities.
it is the component of the products meant to relieve sore throat and minor mouth or throat irritation, muscle aches, sprains, and similar conditions.

It has been proved as anti fungal and antibacterial agent.
it is widely used in confectionery, perfumery, mouth fresheners, cough drops, goods, medicated oils tooth pastes analgesic balms, lotions, shampoos, chewing gums, candies.

Technical details :

Botanical namementha arvensis
Familylabiatae
Part usedleaves and aerial parts
Originindia
Mode of extractionsteam distillation
Main constituentsalpha-pinene, limonene, beta-pinene, citral, geraniol, neral and other sesqueterpenes
Descriptionclear transparent liquid
Appearencecolorless to pale yellow liquid
Organoleptic propertiesstrong penetrating peppermint odour and pungent taste
Refractive index at 20 c1.460-1.471
Specific gravity at 20 c0.896-0.908
Solubilityinsoluble in water and soluble in other organic solvents

Uses:as a fragrance and flavor ingredient, as a herbal ingredient in cosmetic and medicinal products
Storage: well closed in air tight containers away from sunlight and heat preferably in amber color glass containers.