Chemistry
Thymol is only slightly soluble in water at neutral pH, but it is extremely soluble in alcohols and other organic solvents. It is also soluble in strongly alkaline aqueous solutions due to deprotonation of the phenol.
Synonyms include isopropyl-m-cresol, hydroxycymene, 1-methyl-3-hydroxy-4-isopropylbenzene, 2-hydroxy-1-isopropyl-4-methylbenzene; 3-hydroxy-p-cymene, 3-methyl-6-isopropylphenol, 5-methyl-2-(1-methylethyl)phenol, 5-methyl-2-isopropyl-1-phenol, 5-methyl-2-isopropylphenol, 6-isopropyl-3-methylphenol, 6-isopropyl-m-cresol, Apiguard, NSC 11215, NSC 47821, NSC 49142, thyme camphor, m-thymol, and p-cymen-3-ol.
Thymol has a refractive index of 1.5208 and an experimental dissociation exponent (pKa) of 10.59 ± 0.10. Thymol absorbs maximum UV radiation at 274 nm.
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