It is the volatile oil from leaves of Ocimum basilicum L./Ocimum sanctum.
The major constituents are methyl chavicol, cineol, linalool, eugenol and small amounts of methyl eugenol and sesquiterpenes. Basil oil has high anti-bacterial anti-depressant, anti-infectious, anti-spasmodic, anti-viral stimulant and anti-inflammatory properties. It is used in spice and flavor applications, in perfumery and in aromatherapy.