Title: Carvacrol
CAS Registry Number: 499-75-2
CAS Name: 2-Methyl-5-(1-methylethyl)phenol
Additional Names: 2-p-cymenol; 2-hydroxy-p-cymene; isopropyl-o-cresol; isothymol
Molecular Formula: C10H14O
Molecular Weight: 150.22
Percent Composition: C 79.95%, H 9.39%, O 10.65%
Literature References: Found in oil of origanum, thyme, marjoram, summer savory: E. Guenther, The Essential Oils vol. 2 (Van Nostrand, New York, 1949) p 503; Carpenter, Easter, J. Org. Chem. 20, 401 (1955). Prepn by chlorination of a-pinene with tert-butyl hypochlorite: Ritter, Ginsburg, J. Am. Chem. Soc. 72, 2381 (1950); from 2-bromo-p-cymol: Strubell, Baumgartel, Arch. Pharm. 291, 66 (1958). Toxicity data: Kochmann, Arch. Exp. Pathol. Pharmakol. 161, 196 (1931).
Properties: Liquid; thymol odor. d420 0.976; d2525 0.9751. bp760 237-238°; bp18 118-122°; bp3 93°. mp ~0°. nD20 1.52295. uv max (95% ethanol): 277.5 nm (log e 3.262). Volatile with steam. Practically insol in water. Freely soluble in alc or ether. LD orally in rabbits: 100 mg/kg (Kochmann).
Melting point: mp ~0°
Boiling point: bp760 237-238°; bp18 118-122°; bp3 93°
Index of refraction: nD20 1.52295
Absorption maximum: uv max (95% ethanol): 277.5 nm (log e 3.262)
Density: d420 0.976; d2525 0.9751
Toxicity data: LD orally in rabbits: 100 mg/kg (Kochmann)
Use: As disinfectant; in organic syntheses.
Therap-Cat: Has been used as anti-infective; anthelmintic (Nematodes).
Keywords: Anthelmintic (Nematodes); Antiseptic/Disinfectant; Phenols.

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