The salt is not very soluble in water
(6 4 g/100 g of water at 293 K), but when heated it decomposes at 513 K 2KMnO4 ® K2MnO4 + MnO2 + O2
It has two physical properties of considerable interest: its intense colour
and its diamagnetism along with temperature-dependent weak
paramagnetism These can be explained by the use of molecular orbital
theory which is beyond the present scope