Potassium periodate
| Names | |
|---|---|
| IUPAC name
Potassium periodate
| |
| Other names
Periodic acid potassium salt
Potassium metaperiodate | |
| Properties | |
| KIO4 | |
| Molar mass | 230.00 g/mol |
| Appearance | White crystalline solid |
| Odor | Odorless |
| Density | 3.618 g/cm3 |
| Melting point | 582 °C (1,080 °F; 855 K) (decomposition) |
| Boiling point | 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) | |
| Vapor pressure | ~0 mmHg |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Flash point | Non-flammable |
| Related compounds | |
| Related compounds
|
Potassium iodide Potassium iodate |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Potassium periodate is an inorganic salt with the molecular formula KIO4.
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.
Contents
Properties
Chemical
Potassium periodate decomposes at 582 °C to form potassium iodate and oxygen.
- KIO4 → KIO3 + ½ O2
Manganese dioxide can be used to decompose KIO4, by heating its aqueous solution.
Potassium periodate can be used to prepare copper(III) compounds.
Physical
Potassium periodate is a white crystalline solid, poorly soluble in water.
Availability
It is sold by chemical suppliers.
Preparation
Potassium periodate can be prepared by the oxidation of an aqueous solution of potassium iodate by chlorine and potassium hydroxide.[1]
- KIO3 + Cl2 + 2 KOH → KIO4 + 2 KCl + H2O
Projects
- Determination of potassium and cerium
- Oxidizing agent
- Preparation of Cu(III) compounds
Handling
Safety
Potassium poriodate is irritant and a strong oxidizer.
Storage
In closer, airtight containers.
Disposal
Cane be reduced to potassium iodide and recycled.
References
- ↑ Riley, edited by Georg Brauer ; translated by Scripta Technica, Inc. Translation editor Reed F. (1963). Handbook of preparative inorganic chemistry. Volume 1 (2nd ed.). New York, N.Y.: Academic Press. p. 325
