Chemical Component Summary

NameIODIDE ION
Identifiersiodide
FormulaI
Molecular Weight126.90
TypeNON-POLYMER
Isomeric SMILES[I-]
InChIInChI=1S/HI/h1H/p-1
InChIKeyXMBWDFGMSWQBCA-UHFFFAOYSA-M

Chemical Details

Formal Charge-1
Atom Count1
Chiral Atom Count0
Chiral Atomsn/a
Bond Count0
Aromatic Bond Count0
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB09420 Different stereochemistry
NameSodium iodide I-123
Groupsapproved
DescriptionSodium Iodide I-123 is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland. After incorporation, a gamma camera is used to detect the decay by electron capture to tellurium-123. Iodine is commonly used in thyroid function diagnostic tests as this gland normally absorbs iodine through the diet for formation of the thyroid hormones triiodothyronine (T3) and its prohormone, thyroxine (T4). Radioactive I-123 in particular is effective for this use as its half-life of approximately 13.13 h (hours) is ideal for the 24-h (hour) iodine uptake test and it has a reduced radiation burden as compared to I-131.
Synonyms
  • 123I−
  • I 123
  • I-123
  • Iodine 123
  • Iodine-123
Brand NamesSodium Iodide I 123
IndicationAdministration of Sodium Iodide I 123 Capsules is indicated as a diagnostic procedure to be used in evaluating thyroid function and/or morphology.
Mechanism of actionSodium Iodide I-123 is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland. After incorporation, a gamma camera is used to detect the decay by electron capture to tellurium-123. Iodine is commonly used in thyroid function diagnostic tests as this gland normally absorbs iodine through the diet for formation of the thyroid hormones triiodothyronine (T3) and its prohormone, thyroxine (T4).
Route of administrationOral
CAS number69239-56-1