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Periodic Acid

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  • There are two oxoacids referred to as periodic (pronounced per-iodic) or iodic (VII) acid:

    1. Molecular formula: HIO4
    Structural formula:

    2. Molecular formula: H5IO6, also shown as HIO4 • 2 H2O
    Structural formula:

    Hydration of HIO4 gives H5IO6 and dehydration of H5IO6 gives HIO4.

    The commercially available periodic acid is usually H5IO6.

    Periodic acid is a strong oxidizing agent, commonly used to oxidize glycols.


    see also periodate ester, hydroxylation

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