Triiodide

Triiodide
Names
	IUPAC name Triiodide anion
Identifiers
CAS Number	14900-04-0 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1233501 ;
ChemSpider	94786 ;
PubChem CID	105054;
UNII	DA1N05631Q ;
CompTox Dashboard (EPA)	DTXSID40164150 ;
	InChI InChI=1S/I3/c1-3-2/q-1 Key: WRTMQOHKMFDUKX-UHFFFAOYSA-N ;
	SMILES I[I-]I;
Properties
Chemical formula	I−; 3
Molar mass	380.71341 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

In chemistry, triiodide usually refers to the triiodide ion, I⁻
₃. This anion, one of the polyhalogen ions, is composed of three iodine atoms. It is formed by combining aqueous solutions of iodide salts and iodine. Some salts of the anion have been isolated, including thallium(I) triiodide (Tl⁺[I₃]⁻) and ammonium triiodide ([NH₄]⁺[I₃]⁻). Triiodide is observed to be a red colour in solution.

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