Iodine pentoxide

Iodine pentoxide
Names
	IUPAC name Iodine pentoxide
	Other names Iodine(V) oxide; Iodic anhydride
Identifiers
CAS Number	12029-98-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:29914 ;
ChemSpider	140179 ;
ECHA InfoCard	100.031.569
PubChem CID	159402;
UNII	UPU35C0Q0N ;
CompTox Dashboard (EPA)	DTXSID40923305 ;
	InChI InChI=1S/I2O5/c3-1(4)7-2(5)6 Key: BIZCJSDBWZTASZ-UHFFFAOYSA-N ; InChI=1/I2O5/c3-1(4)7-2(5)6 Key: BIZCJSDBWZTASZ-UHFFFAOYAR;
	SMILES O=I(=O)OI(=O)=O;
Properties
Chemical formula	I; 2O; 5
Molar mass	333.81 g/mol
Appearance	white crystalline solid ; hygroscopic
Density	4.980 g/cm3
Melting point	300 °C (572 °F; 573 K) (decomposes)
Solubility	soluble in water and nitric acid; ; insoluble in ethanol, ether and CS2
Magnetic susceptibility (χ)	−79.4·10−6 cm3/mol
	Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	-173.0 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	oxidizer
NFPA 704 (fire diamond)	3 0 0 OX
Related compounds
Other anions	iodine pentafluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Iodine pentoxide is the chemical compound with the formula I₂O₅. This iodine oxide is the anhydride of iodic acid, and the only stable oxide of iodine. It is produced by dehydrating iodic acid at 200 °C in a stream of dry air:

2HIO₃ → I₂O₅ + H₂O

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