and ammonium triiodide ([NH₄]⁺[I₃]^-). Triiodide is observed to be a red colour in solution.

Nomenclature

Other chemical compounds with "triiodide" in their name contain three separate or independent iodide centers rather than a single unit that consists of three iodine atoms. The prefix "tri" in that situation is a multiplicative prefix for iodide--a 3:1 stoichiometric ratio--rather than part of the

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