Historical reference: Do not rely on this information. It is very old. About this collection
Iodides are the salts of Hydriodie Acid (q.v.), i.e. are hydriodie acid in which the hydrogen has been replaced by a metal, or equivalent group of elements. Of these the most important is potassium iodide, which is very largely employed for chemical and other purposes, while many iodides are used to a great extent in medicine and photography. Other compounds of iodine with elements other than metals are also termed iodides, as, e.g., iodide of phosphorus, etc.