Origin. - A phenol, C6H3.(CH3).(OH)(C3H7) 1:3:4, occurring in the volatile oils of Thymus vulgaris L., and in some other volatile oils.

Description and Properties - Large, colorless, translucent crystals of the hexagonal system, having an aromatic, thyme-like odor and a pungent, aromatic taste, with a very slight caustic effect upon the lips. Its specific gravity as a solid is 1.030, but when liquefied by fusion it is lighter than water. It is soluble in about 1100 parts of water and in less than its own weight of alcohol, ether, or chloroform; also readily soluble in carbon disulphide, glacial acetic acid, and in fixed or volatile oils. When triturated with about equal quantities of camphor, menthol, or chloral, it liquefies.

Dose. - 1-5 grains (0.06-0.3 Gm.) [2 grains (0.125 Gm.), U. S. P.].

Thymolis Iodidum - Thymolis Iodidi - Thymol