4KMnO4 + KH2PO2 + 6KOH → 4K2MnO4 + K3PO4 + 4H2O
Potassium permanganate react with potassium and hypophosphite potassium hydroxide to produce potassium manganate, tripotassium phosphate and water. Potassium permanganate and potassium hydroxide - concentrated solutions.