This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Cadmii Iodidiim. - Iodide of Cadmium. CdI2.
Characters. - Flat white micaceous crystals, of a pearly lustre. Solubility, 1 in 1 1/2 of water.
Impurity. - Zinc, and general impurities.
Preparation. Unguentum Cadmii Iodidi. - 1 in 8.
Cadmium closely resembles zinc in its action, both locally and specifically, but is even more irritant, and is not given internally. The iodide, in the form of the ointment or in aqueous solution, is applied as a local stimulant to enlarged joints and glands, to promote absorption, instead of the iodide of lead which stains the skin yellow.