Characteristic

Iridium(IV) Iodide (iridium tetraiodide) is a black compound.

Formula: IrI₄

Formula weight: 699.82

Appearance:Black powder

Melting Point:100 °C (212 °F) decomposes

Sensitivity: Ambient temperatures.

Solubility: Insoluble in water and alcohol. Soluble in aqueous KI

Application

Methanol carbonylation to acetic acid is catalysed with high rates at low water concentrations using an iridium/iodide based catalyst. Iridium(IV)-iodide mixtures participates in the Investigations in platinum metal group electrochemistry. Rhodium- and iridium-iodide catalysts also promote the carbonylation of higher alcohols to linear or branched chain carboxylic acids.