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iodine-123
Sign in to saveAlso known as I-123, 123I, iodide ion i-123
Iodine-123 (123I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single-photon emission computed tomography (SPECT) or SPECT/CT exams. The isotope's half-life is 13.223 hours; the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging). In medical applications, the radiation is detected by a gamma camera. The isotope is typically applied as iodide-123, the anionic form.
In the Vinony graph
Within Vinony's link graph, iodine-123 is referenced by 96 other articles, and connects out to electronvolt, isotope of xenon and gamma ray.
It is catalogued under topics including Chemical articles with multiple CAS registry numbers, Chemical articles with multiple PubChem CIDs and Chemical pages without ChemSpiderID.
Its subject is documented across 13 Wikipedia language editions.
Key facts
- Isotope.alternate_names
- radioiodine
- Isotope.symbol
- I
- Isotope.mass_number
- 123
- Isotope.mass
- 122.905590
- Isotope.num_neutrons
- 70
- Isotope.num_protons
- 53
- Isotope.abundance
- 0
- Isotope.halflife
- 13.223 hours
- Isotope.decay_mode1
- electron capture
- Isotope.decay_energy1
- 1.228 MeV
- Isotope.decay_product
- tellurium-123
- Isotope.decay_symbol
- 123Te
- Isotope.parent
- Xenon-123
- Isotope.parent_symbol
- 123Xe
via Wikipedia infobox
Chemical data
- Formula
- I-
- Molecular weight
- 122.90559 g/mol
- IUPAC name
- iodine-123(1-)
- SMILES
- [123I-]
- InChIKey
- XMBWDFGMSWQBCA-AHCXROLUSA-M
- XLogP
- 0.9
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 1
- Formal charge
- -1
via PubChem
Wikidata facts
- Instance of
- isotope of iodine
- Subclass of
- iodine
- Mass
- 122.90558852
Show 10 more facts
- parity quantum number
- 1
- atomic number
- 53
- neutron number
- 70
- half-life
- 13.2235
- spin quantum number
- 2.5
- canonical SMILES
- [I-]
- chemical formula
- I⁻
- isomeric SMILES
- [123I-]
- mass excess
- -87943.727
- binding energy
- 1039251.354
Sources (6)
via Wikidata · CC0
~6 min read
Encyclopedic overview
6 sectionsContents
- Production
- Decay
- Medical applications
- Precautions
- See also
- References
Iodine-123 (123I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single-photon emission computed tomography (SPECT) or SPECT/CT exams. The isotope's half-life is 13.223 hours; the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging). In medical applications, the radiation is detected by a gamma camera. The isotope is typically applied as iodide-123, the anionic form.
==Production==
Excerpted from Wikipedia’s “iodine-123” article, available under the CC BY-SA 4.0 licence.