What does iodic mean?
Iodic is a technical adjective meaning relating to iodine in its +5 oxidation state. Its best-known use is in the term iodic acid, a chemical compound with the formula HIO3. In an iodic compound, iodine has an oxidation state of +5, distinguishing it from compounds in which iodine has lower oxidation states. The word is chiefly encountered in chemistry textbooks, laboratory documentation, and discussions of inorganic reactions; it has little use in general conversation. Iodic acid is a stable solid when pure and is generally encountered as an aqueous solution. Because the adjective is specialized and relatively uncommon, context usually clarifies its meaning, especially in phrases involving iodic acid. It should not be confused with iodous, which describes a lower oxidation state of iodine.
adjectiveRelating to iodine in its +5 oxidation state, especially to iodic acid or compounds derived from it.
- Relating to iodine in its +5 oxidation state, especially to iodic acid or compounds derived from it.
"The label warned that the bottle contained concentrated iodic acid."
"The label warned that the bottle contained concentrated iodic acid."
"The reaction between iodic acid and the reducing agent was studied under controlled conditions."
Iodic acid contains iodine in its uncommon +5 oxidation state, the most oxidized form commonly encountered in elementary chemistry.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of iodic
The word was formed in English from iodo-, a combining form associated with iodine, and the adjective-forming suffix -ic. The element name iodine comes from Greek iṓdē, meaning violet-coloured, a reference to the colour of iodine vapour. Iodate, iodide, and iodize belong to the same family of English terms based on the element's name and designation.
Related word forms
How iodic is actually used
A technical chemistry term found chiefly in the name iodic acid and in descriptions of iodine compounds in the +5 oxidation state.
Easily confused with iodic
Iodic describes iodine in the +5 oxidation state, whereas iodous refers to a lower oxidation state, commonly +1.