Potassium periodate

Potassium periodate is an inorganic salt with the molecular formula KIO4. It is composed of a potassium cation and a periodate anion and may also be regarded as the potassium salt of periodic acid. Note that the pronunciation is per-iodate, not period-ate.

Potassium periodate
Names
IUPAC name
Potassium periodate
Other names
potassium metaperiodate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.269
EC Number
  • 232-196-0
UNII
  • InChI=1S/HIO4.K/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 Y
    Key: FJVZDOGVDJCCCR-UHFFFAOYSA-M Y
  • InChI=1/HIO4.K/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1
    Key: FJVZDOGVDJCCCR-REWHXWOFAS
  • [K+].[O-]I(=O)(=O)=O
Properties
KIO4
Molar mass 230.00 g mol−1
Appearance white crystalline powder
Odor odourless
Density 3.618 g/cm3
Melting point 582 °C (1,080 °F; 855 K) (decomposes)
0.17 g/100 mL (0 °C)
0.42 g/100 mL (20 °C)
4.44 g/100 mL (80 °C)
7.87 g/100 mL (100 °C)
Structure
tetragonal
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Oxidant
NFPA 704 (fire diamond)
1
0
0
OX
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
 Potassium iodide
Potassium iodate
Other cations
 Sodium periodate
Related compounds
 Periodic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Unlike other common periodates, such as sodium periodate and periodic acid, it is only available in the metaperiodate form; the corresponding potassium orthoperiodate (K5IO6) has never been reported.

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