Iodoform

Iodoform (CHI₃) is a lemon-yellow crystalline substance, having a saffron-like odour and an unpleasant iodine-like taste. Its odour is most persistent, and can hardly be removed. It is of interest as having a composition similar to that of Chloroform (q.v.), from which it only differs in having iodine in the place of chlorine. It may be prepared by the action of iodine on alcohol in the presence of carbonate of potash. It is almost insoluble in water, but dissolves in alcohol, ether, and chloroform. It is readily volatile when heated, and in the form of vapour has anaesthetic properties. It is employed externally as an application to painful ulcers, and it often gives relief in uterine cancer. In the form of iodoform gauze it is used in antiseptic surgery.