- Origin, by heating on a water bath potassium guaiacol with benzosol-chloride: the impure benzosal-guaiacol formed is purified by recrystallization from alcohol.

Description and Properties. - Colorless, tasteless, and odorless crystalline powder, almost insoluble in water, but readily soluble in ether, chloroform, and hot alcohol.

Dose. - 10-150 grains (0.60-10 Gm.) daily.

Guaiacolis Diiodidum - Guaiacolis Diiodidi - Guaiacol Diiodide. - Origin, by adding a solution of iodine in potassium iodide to an aqueous solution of sodium-guaiacol as long as precipitation continues.

Description and Properties. - Reddish-brown salt, having the odor of iodine, soluble in alcohol and fixed oils, and readily decomposed.

Dose. - 2-15 grains (0. 10-1 Gm.).