Manganese Heptoxide

2019923manganesevii oxide, also known as permanganic acid and manganese heptoxide, is a chemical compounde manganese is in its 7 oxidation states chemical formula is mn 2 o 7this is about the only 7 oxidation state compound of manganese that is not a permanganates chemical formula is mn 2 o 7 is either a dark red or green oil.