Chloride of tin is prepared by heating tin and hydrochloric acid together, and has been recommended for local application in purulent discharges. According to M. Mallez, chloride of tin has a direct action upon purulent secretions from mucous surfaces, without any substitutive action, like nitrate of silver for instance. Placed in contact with pus globules, under the microscope, these are seen to immediately disappear. In purulent diseases of the eye, also it was successful. A solution, consisting of Formula 780 of the salt in of distilled water, is used for injections.