Iodine pentoxide

Iodine pentoxide
Names
IUPAC name
Iodine pentoxide
Other names
Iodine(V) oxide
Iodic anhydride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.031.569 Edit this at Wikidata
UNII
  • InChI=1S/I2O5/c3-1(4)7-2(5)6 checkY
    Key: BIZCJSDBWZTASZ-UHFFFAOYSA-N checkY
  • InChI=1/I2O5/c3-1(4)7-2(5)6
    Key: BIZCJSDBWZTASZ-UHFFFAOYAR
  • O=I(=O)OI(=O)=O
Properties
I
2O
5
Molar mass 333.81 g/mol
Appearance white crystalline solid[1]
hygroscopic
Density 4.980 g/cm3[1]
Melting point 300 °C (572 °F; 573 K)[2] (decomposes)
Solubility soluble in water and nitric acid;
insoluble in ethanol, ether and CS2
−79.4·10−6 cm3/mol
Thermochemistry
-173.0 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 oxidizer
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
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).
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Iodine pentoxide
Fresh 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]

2HIO3 → I2O5 + H2O
  1. ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 851–852. ISBN 978-0-08-037941-8.
  2. ^ Patnaik, P. (2002). Handbook of Inorganic Chemicals. McGraw-Hill. ISBN 0-07-049439-8.