Silver permanganate is an inorganic compound, with the chemical formula AgMnO4. It is a purple crystal that adopts a monoclinic crystal system. The crystallization is achieved by the action of potassium permanganate on conceiltrated silver nitrate solution. This is a autocatalytic process.
During thermal decomposition, silver permanganate decomposes to a relatively insoluble amorphous product. The thermal decomposition process was studied at 100 degC and the decomposition products were investigated for their chemical and structural properties. Moreover, the effects of zinc oxide on the decomposition of silver permanganate were evaluated.
Silver permanganate is generally available immediately. However, its availability is subject to impurities and additives. Generally, the product is produced to pharmaceutical grade and food grade standards.
Unlike the aqueous solution, the permanganate salt does not oxidize silver. Besides, the permanganate salt is reducing cation. Consequently, the decomposition rate of the permanganate salt is influenced by the addition of end products. In addition, the permanganate salt loses its crystalline silver salt fraction quickly.
A comparison between the thermal decomposition and the aqueous solution of the permanganate salt was made. Both methods produced similar results, namely, the degradation of the silver salt was stoichiometric. Moreover, the chemical analysis of the decomposition products confirmed the stoichiometric reaction.
Further studies showed that the thermal decomposition of the permanganate salt could be delayed by the application of zinc oxide. Furthermore, the zinc oxide carrier is much more stable than the beryllium oxide carrier.
Nevertheless, the chemical analysis of the decomposition product indicated that the product was manganese dioxide. This is consistent with the findings of thermal decomposition and aqueous solution.