This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In cases of suppuration, such as carbuncle or continued eruption of boils, or discharging wounded surfaces, also in sloughing or gangrene, the chlorate and permanganate have been found useful internally as well as locally, but it is especially in ulceration about the mouth, the gums, and the fauces that chlorate of potash is most valuable. Mr. Hutchinson has recorded many cases occurring in unhealthy children, and very obstinate until this remedy was given in full doses of from 10 to 30 gr. (Medical Times, ii., 1856). Mr. Hunt introduced it as a specific in ulcerative and gangrenous stomatitis ("Medico-Chirurgical Transactions," xxvi.), and I consider it a most valuable remedy when used internally and locally in these affections. In relaxed sore throat and catarrhal pharyngitis the chlorate is often serviceable, and is commonly prescribed in the form of lozenge.
In mercurial stomatitis it has proved useful (Herpin, Hutchinson, etc.), and Ricord administered it with mercury to obviate injurious effects from the latter. Sir T. Watson quotes a formula containing the chlorate 10 gr., with an equal quantity of sulphur, as "almost a specific," but my own experience is rather that of Bartholow and some other observers, viz., that the chlorate does not give, in mercurial maladies, the same good results as in ordinary stomatitis.