periodic acid

/ˌpɜːɹaɪˈɒdɪk ˈæsɪd/

noun

HIO₄ or H₅IO₆, the oxyacids of iodine in which iodine has the highest oxidation number; H₅IO₆ is a white crystalline substance (HIO₄ is not stable), and both are strong oxidizing agents.

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Meanings

nounperiodic acid (plural periodic acids)

plural periodic acids

  1. chemistryHIO₄ or H₅IO₆, the oxyacids of iodine in which iodine has the highest oxidation number; H₅IO₆ is a white crystalline substance (HIO₄ is not stable), and both are strong oxidizing agents.

Origin

From per- + iodic acid.

Full word history & related roots →
Cite this entry
APA

periodic acid. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/periodic%20acid

MLA

“periodic acid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/periodic%20acid. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “periodic acid,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/periodic%20acid.

Source: periodic acid on Wiktionary, CC BY-SA 4.0.