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KI

Potassium iodide

IUPAC : Potassium iodide
HalideSaltPharmaceuticalLaboratoryFood

The most common iodide salt in pharmacy. Distributed as thyroid-protection tablets in the event of a nuclear accident (saturation of the thyroid with stable iodine to block uptake of radioactive iodine).

3D ball-and-stick representation of Potassium iodide (formula KI). Constituent atoms: K, I.
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Physical properties

Molar mass166.003 g/mol
State at 20 °Csolid
Density3.123 g/cm³
Melting point954.00 K (681 °C)
Boiling point1603.00 K (1330 °C)
Solubility (H₂O)140 g/100 mL à 20 °C

Structure

Crystal systemCubic
3D render modeBall-and-stick

Uses and applications

  • Thyroid protection in case of nuclear accident
  • Iodised table salt (prevention of iodine deficiency)
  • Laboratory reagent (starch test, Lugol's solution)
  • Silver-halide photography (preparation of AgI emulsions)
  • Medical expectorant (at pharmacological dose)

Constituent elements

19K
Potassium
53I
Iodine

References

PubChem CID4875
CAS7681-11-0
SMILES[K+].[I-]
Sources : PubChem CID 4875 · CRC Handbook of Chemistry and Physics