Hops
Title: Hops
Literature References: Carefully dried strobiles of Humulus lupulus L., Moraceae, bearing their glandular trichomes. Habit. Europe, Asia, North America, cultivated widely. Constit. Volatile oil (0.3-1%), bitter acids incl. lupulone, humulone; flavonoids incl. xanthohumol; ferulic, caffeic and chlorogenic acids; tannins, resins. Review of chemistry and constituents: R. Stevens, Chem. Rev. 67, 19-71 (1967); of botany, chemistry and use in beer brewing: M. Moir, J. Am. Soc. Brew. Chem. 58, 131-146 (2000); of medicinal uses: J. Barnes et al., Herbal Medicines (Pharmaceutical Press, London, 2nd Ed., 2002) pp 290-292.
 
Derivative Type: Volatile oil
CAS Registry Number: 8007-04-3
Additional Names: Oil of hops
Literature References: Constit. Complex mixture of more than 100 terpenoid components, primarily humulene, b-caryophyllene, farnescene.
Properties: Light yellow to green-yellow liquid. Darkens and becomes viscous with aging. d2525 0.825-0.926. nD20 1.470-1.494. Acid value not more than 11.0. Saponification value between 14 and 69. Sol in most fixed oils. Practically insol in glycerin, propylene glycol. Keep well closed, cool and protected from light.
Index of refraction: nD20 1.470-1.494
Density: d2525 0.825-0.926
 
Use: In beer brewing; oil in hair rinses and bath prepns.
Therap-Cat: Sedative.

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