Prep. Made by dissolving one pound of the prepared tersul-phuret in four pints of hydrochloric acid with the aid of heat, and reducing the solution to two pints.

Prop. & Comp. A heavy liquid, of a yellowish-red colour; sp. gr. 1.47. A little of it dropped into water gives a white precipitate, which becomes orange when treated with sulphuretted hydrogen. The solution, filtered from the white precipitate, gives rise to a copious deposit when treated with nitrate of silver. These reactions show that antimony and chlorine are present in the solution. One drachm, mixed with a solution of a quarter of an ounce of tartaric acid in four ounces of water, gives a precipitate with sulphuretted hydrogen, which, when washed and dried at 212°, weighs at least 22 grains, indicating the amount of antimony.

Therapeutics. This solution of terchloride of antimony is a powerful caustic and escharotic. It is applied sometimes to cancerous growths, and also to poisoned wounds, to the bites of venomous serpents, etc. It is never administered internally, but is used in the preparation of the oxide of antimony.