This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
A volatile oil distilled from the leaves of Rosmarinus officinalis Linne (nat. ord. Labiatae).
Basin of the Mediterranean; cultivated.
A colorless or pale yellow, limpid liquid, having the characteristic pungent odor of Rosemary, and a warm, somewhat camphora-ceous taste. Sp. gr., 0.895 to 0.915.
The chief constituents are - (1) The terpene, Pinene, C10H16, 80 per cent. (2) Cineol, C10H18O. (3) Borneo!, C10H16O, an alcohol isomeric with Geraniol (q. v.). (4) Linalool (see p. 545). (5) Menthol (see p. 547).
Oil of Rosemary is contained in Linimentum Saponis and Tinctura Lavandulae Composite.
Dose, 1 to 5 m.; .06 to .30 c.c.
Oil of rosemary has an action similar to that of other aromatic volatile oils. It is very commonly used to give a pleasant scent to lotions and other preparations which are used externally.