Silver permanganate is an inorganic compound with the chemical formula AgMnO<sub>4</sub>. This salt is a purple crystal adopting a monoclinic crystal system. It decomposes when heated or mixed with water, and heating to high temperature may lead to explosion.
It can be produced through the reaction of silver nitrate and potassium permanganate:
Silver permanganate is an oxidizing agent for carbon monoxide when deposited on metallic oxide carriers. As a result, it was investigated for use in gas masks but was ultimately abandoned due to its expense and it being consumed in the reaction rather than acting as a catalyst.
A caesium silver permanganate with the formula Cs<sub>3</sub>Ag[MnO<sub>4</sub>]<sub>4</sub> has been characterized.