My watch list  

Iodic acid

Iodic acid
Other names Iodic(V) acid
CAS number 7782-68-5
Molecular formula HIO3
Molar mass 175.91 g/mol
Appearance white solid
Density 4.62 g/cm3, solid
Melting point

110 °C

Solubility in water 269 g/100 ml (20 °C)
Acidity (pKa) 0.75
EU classification not listed
Flash point non flammable
Related Compounds
Other anions Hydriodic acid
Periodic acid
Other cations Potassium iodate
Related oxoacids Chloric acid
Bromic acid
Related compounds Iodine pentoxide
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 insoluble 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.


    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Iodic_acid". A list of authors is available in Wikipedia.
    Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE