Iodic acid

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Template:Chembox header | Iodic acid
Iodic acid
Ball-and-stick model of iodic acid Space-filling model of iodic acid
Template:Chembox header | General
Other names Iodic(V) acid
Molecular formula HIO3
Molar mass 175.91 g/mol
Appearance white solid
CAS number [7782-68-5]
Template:Chembox header | Properties
Density and phase 4.62 g/cm3, solid
Solubility in water 269 g/100 ml (20 °C)
Melting point 110 °C
Boiling point ? °C (? K)
Acidity (pKa) 0.75
Template:Chembox header | Structure
Molecular shape ?
Dipole moment ? D
Template:Chembox header | Hazards
MSDS External MSDS
EU classification not listed
NFPA 704
Flash point non flammable
Template:Chembox header | Supplementary data page
Structure and
n, εr, etc.
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Template:Chembox header | Related compounds
Other anions Hydriodic acid
Periodic acid
Other cations Potassium iodate
Related oxoacids Chloric acid
Bromic acid
Related compounds Iodine pentoxide
Template:Chembox header | Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Iodic acid, HIO3, can be obtained as a white solid. It is an isolable compound, unlike chloric acid or bromic acid.


Iodic acid can be produced by oxidizing I2 with chlorine in an aqueous solution


Iodic acid is a relatively strong acid with a pKa of 0.75. It is strongly oxidizing in acidic solution, less so in basic solution.


Iodic acid is used as a standard strong acid in analytical chemistry. It may be used to standardize solutions of both weak and strong bases, with methyl red or methyl orange as the indicator.

External links


cs:Kyselina jodičná de:Iodsäure it:Acido iodico fi:Jodihappo Template:WikiDoc Sources