Thymol
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
C6H3[CH3][OH][CH(CH3)2]1,3,4 150.22 CAS RN®: 89-83-8. - Colorless, often large, crystals, or a white, crystalline powder. Is affected by light. Has greater density than water, but when liquefied by fusion is less dense than water. Its alcohol solutions are neutral to litmus. One g dissolves in about 1000 mL of water, in 1 mL of alcohol, in 1 mL of chloroform, in 1.5 mL of ether, and in about 2 mL of olive oil.
Soluble in glacial acetic acid and in fixed or volatile oils. Store in tight, light-resistant containers.
Melting Range 〈741〉: between 48° and 51°, but when melted it remains liquid at a considerably lower temperature.
Nonvolatile Matter: Volatilize 2 g on a steam bath, and dry at 105° to constant weight: the residue weighs not more than 1 mg (0.05%).
