What is "permanganic acid"

n. (context chemistry English) the acid, HMnO₄, known only as its salts, the permanganates

n. an unstable purple acid (HMnO4) known only in solution or of permanganate salts

Permanganic acid is the inorganic compound with the formula H MnO. This strong oxoacid has been isolated as its dihydrate. It is the conjugate acid of permanganate salts. It is the subject of few publications and its characterization as well as its uses are very limited.