Periodic acid (pronounced per-iodic /ˌpɜːr.aɪˈɒdᵻk/ PURR-eye-OH-dik, rather than /ˌpɪəriˈɒdᵻk/ PEER-ee-OD-ik as in periodic table) is the highest oxoacid of iodine, in which the iodine exists in oxidation state VII. Like all periodates it can exist in two forms: orthoperiodic acid, with the chemical formula H5IO6 and metaperiodic acid, which has the formula HIO4.
Periodic acid was discovered by Heinrich Gustav Magnus and C. F. Ammermüller in 1833.
== Synthesis ==
Modern industrial scale production involves the electrochemical oxidation of iodic acid, on a PbO2 anode, with the following standard...