Permanganic anhydride: Manganese heptaoxide (Mn2O7)
KMnO4 (potassium permanganate) reacts nrog txias concentrated sulfuric acid los ua tsaus ntsuab oily manganese heptaoxide (Mn2O7):
5H2SO4 +4KMnO4 → 2K2SO4 + Mn2 (SO4) 3 + Mn2O7 + 5H2O + 2O2 ↑
Nws kub hnyiab thaum ntsib cov teeb meem organic, thiab rhuav tshem cov khoom tawg thaum kub. O2 (oxygen) maj mam tso tawm ntawm chav sov thiab hloov mus rau MnO2 (manganese dioxide). Ib qho me me ntawm ozone kuj tseem yuav tsim tawm thaum lub sijhawm rhuav tshem.