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Related to periodic acid: Periodic acid Schiff
A white, crystalline inorganic acid, HIO4·2H2O, used as an oxidizer.
(Elements & Compounds) any of various oxyacids of iodine containing a greater proportion of oxygen than iodic acid and differing from each other in water content, esp either of the crystalline compounds HIO4 (metaperiodic acid) and H5IO6 (paraperiodic acid)
[C19: from per- + iodic]
per′i•od′ic ac′id(ˈpɜr aɪˈɒd ɪk, ˌpɜr-)
any of a series of acids derived from I2O7 by the addition of water molecules, as HIO4 or H5IO6.