Thymolum

Description Thymol is obtained from Thyme oil by fractional distilla- lion, at 225°. It forma about one-half of Thyme oil. The more volatile parta of Thyme oil (Thymene and Cymene) likewise contain a considerable quantity of Thymol, which may be obtained by agitating the liquid with Boda-lye, separating the undissolved oil, diluting the alkaline solution with water.

Supersaturate (his with Hydrochloric acid and Thymol will be precipitated. Thymol is purified by crystailiEation from an alcoholic eolntion. The crystals are transparent rhomboid tables. It has a mild odor and an aromatic, peppery taste.

Somewhat heavier than water. It dissolves in about 300 parts water, and is easily soluble in alcohol and ether. Water does not precipitate it from the alcoholic solution.

Preparation. — Thymol, 1 parti ali:ohol, 10 parts; glycerin, 20 parts; water, 1000 parts. Used as an antiseptic.

See ''Therapeutics of New Kemodies."