Chemical Component Summary

Name IODIDE ION
Identifiers iodide
Formula I
Molecular Weight 126.90 g/mol
Type non-polymer
Isomeric SMILES [I-]
InChI InChI=1S/HI/h1H/p-1
InChI Key XMBWDFGMSWQBCA-UHFFFAOYSA-M

Chemical Details

Formal Charge -1
Atom Count 1
Chiral Atom Count 0
Chiral Atoms
Bond Count 0
Aromatic Bond Count 0

Drug Info: DrugBank

DrugBank ID DB09420   (Different stereochemistry)
Name Sodium iodide I-123
Groups approved
Description Sodium 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 Names Sodium Iodide I 123
Indication Administration of Sodium Iodide I 123 Capsules is indicated as a diagnostic procedure to be used in evaluating thyroid function and/or morphology.
Mechanism of action Sodium 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 administration Oral
CAS number 69239-56-1
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID: 21059682