permanganic
/ˌpəːmanˈɡanɪk/ /ˌpəːmaŋˈɡanɪk/Chemistry
adjective
Containing manganese in its highest oxidation state, 7; permanganic acid noun a strong acid, HMnO4, known only as a purple aqueous solution.
Origin
Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. From per- + manganic.