Iodine pentoxide

Iodine pentoxide is the chemical compound with the formula I2O5.

This iodine oxide is the anhydride of iodic acid, and one of the few iodine oxides that is stable.

It is produced by dehydrating iodic acid at 200 °C in a stream of dry air:[1] I2O5 is bent with an I–O–I angle of 139.2°, but the molecule has no mirror plane so its symmetry is C2 rather than C2v.

[3] Iodine pentoxide easily oxidises carbon monoxide to carbon dioxide at room temperature: This reaction can be used to analyze the concentration of CO in a gaseous sample.

I2O5 forms iodyl salts, [IO2+], with SO3 and S2O6F2, but iodosyl salts, [IO+], with concentrated sulfuric acid.

NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazard OX: Oxidizer. E.g. potassium perchlorate
Iodine pentoxide
Fresh iodine pentoxide