is the principal aromatic component of thyme. The chemical composition of
Thymus (thyme) includes a variety of essential oils, flavonoids, phenolic acids, triterpenes, and other compounds. The essential oils found in thyme include
thymol, which is a major component responsible for the plant's antiseptic properties, and carvacrol, another primary component with similar functions. Other essential oils present are p-cymene, γ-terpinene, linalool, and 1,8-cineole.
Gas chromatographic analysis reveals that the most abundant
volatile component of thyme leaves is
thymol, at 8.55mg/g. Other components are
carvacrol,
linalool,
α-terpineol, and 1,8-
cineole. Some of these compounds have beneficial properties. In particular, thymol has been historically used as an
antibiotic and
antiseptic, especially in traditional medicine. Oil of thyme, the
essential oil of common thyme, contains 20–54% thymol. Thymol is an active ingredient in various commercially produced
mouthwashes, such as
Listerine. Flavonoids in thyme include luteolin-7-O-glucoside, a glycoside known for its antioxidant and anti-inflammatory properties, as well as apigenin, quercetin, and kaempferol. Phenolic acids such as rosmarinic acid, == Important species and cultivars ==