5382. Laurel

Nomenclature

Bay laurel; Roman laurel; Turkish laurel; sweet bay.

Description and references

Evergreen shrub, Laurus nobilis L., Lauraceae, bearing pale yellow flowers, shiny black berries and glossy aromatic foliage. Known since ancient times as a medicinal plant and spice; often used as a symbol of victory or achievement. Habit. Mediterrean region. Constit. Leaves: volatile oil (1-3%), costunolide, laurenobiolide, catechins, proanthocyanidins, alkaloids, plant acids. Fruit: fatty oil (25-55% ), sesquiterpine lactones, volatile oil (1-4%). Comprehensive description: S. Kumar et al. in Handbook of Herbs and Spices, Vol. 1, K. V. Peter, Ed., (Woodhead Publishing, Cambridge, 2001) pp 52-61. Composition of essential oil: M. Ozcan, J.-C. Chalchat, J. Med. Food, 8, 408 (2005). Reviews of composition and uses: A. Y. Leung, S. Foster, Encyclopedia of Common Natural Ingredients, (Wiley-Interscience, Hoboken, 2nd Ed., 2003) pp 69-72; J. Gruenwald et al., PDR for Herbal Medicines (Medical Economics, Montvale, 3rd Ed., 2004) p 500.

Derivative

Laurel berry oil.

Nomenclature

CAS number: 8002-41-3

Description and references

Fixed oil from fresh fruit. Constit. Chiefly lauric, palmitic, oleic acids, volatile oil, sesquiterpene lactones.

Properties

Greenish, fatty solid. d ≈0.88. mp ≈40°. nD25 1.4783. Sapon no. 198-199. Iodine no. 68-80. Insol in water. Sparingly sol in alcohol; sol in benzene, ether, carbon disulfide.

Derivative

Laurel leaf oil.

Nomenclature

Oil of sweet bay; bay leaf oil; volatile oil of laurel.

Description and references

Obtained by steam distillation from leaves of Laurus nobilis L., Lauraceae. Constit. Eucalyptol (30-60%), α- and β-pinene, α-terpineol, sabinene, linalool.

Properties

Light yellow to yellow liquid with aromatic spicy odor. d2525 0.905-0.929. nD20 1.465-1.470. Rotation: 10° to 19°. Acid no. not >3.0. Sapon no. 15-45; 36-85 after acetylation. Sol in most fixed oils, in 1 vol 80% alcohol, with cloudiness in mineral oil, propylene glycol. Insol in glycerin. Keep well closed, cool and protected from light.

Note

Should not be confused with West Indian bay, Pimenta racemosa, or California laurel, Umbellularia californica.

Use

Culinary herb (bay leaf), component of bouquet garni; flavoring agent. Fragrance component in soaps, creams, lotions, detergents, perfumes.

Therapeutic Category

Rubefacient; in treatment of rheumatism and gout; carminative.