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Substance:Potassium iodide

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  • Main ChemSpider page
  • Molecular formula: IK
  • Molar mass: 166.003
  • CAS Registry Number: Not available
  • Appearance: Potassium iodide, 99%; Potassium iodide, 99.99% (metals basis); Potassium iodide, 99.9% (metals basis); Potassium iodide, ultra dry, 99.998% (metals basis); Potassium iodide, ACS, 99.0% min; Potassium iodide, 99.995% (metals basis); Potassium iodide, Puratronic®, 99.999% (metals basis); Potassium iodide, 99%; Potassium iodide, 99.99% (metals basis); Potassium iodide, 99.9% (metals basis); Potassium iodide, ultra dry, 99.998% (metals basis); Potassium iodide, ACS, 99.0% min; Potassium iodide, 99.995% (metals basis); Potassium iodide, Puratronic®, 99.999% (metals basis); white granules or crystals
  • Melting point: 681 °C
  • Boiling point: 1420 °C
  • Solubility: Soluble in water, alcohol, acetone, and glycerol
  • Safety sheet: Not available
  • Spectra: Check on SDBS. Add Spectra (Help).

From Wikipedia

Potassium iodide is an inorganic compound with the chemical formula KI. This white salt is the most commercially significant iodide compound, with approximately 37,000 tons produced in 1985. It is less hygroscopic (absorbs water less readily) than sodium iodide, making it easier to work with. Potassium iodide occurs naturally in Kelp. Kelp's iodide content can range from 89 µg/g to 8165 µg/g.

Aged and impure samples are yellow because of the slow oxidation of the salt to potassium carbonate and elemental iodine.

4 KI + 2 CO2 + O2 → 2 K2CO3 + 2 I2

Potassium iodide is medicinally used for thyroid blockade, thyroid storm and also as an expectorant.

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Other names

Potassium iodide (IUPAC Name); iodic acid potassium salt; Potassium monoiodide; Potassium salt of hydriodic acid

References

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