Indium in 111 chloride?

Do you mean Indium-111 chloride (In-111 chloride), the radioactive form used in nuclear medicine? Here’s a quick overview:

- What it is: A radiopharmaceutical where indium-111 (a beta+/gamma emitter) is in the +3 oxidation state as indium(III) chloride. It’s used as a source to make various In-111– labeled imaging agents.

- Half-life and decay: Half-life about 2.8 days (67 hours). It emits gamma rays at energies suitable for gamma cameras/SPECT, notably around 171 keV and 245 keV.

- Common clinical uses:
- Octreoscan: In-111 labeled octreotide (In-111 pentetreotide) for imaging neuroendocrine tumors.
- Leukocyte labeling: In-111 can be used (via chelators like oxine) to label white blood cells for infection/inflammation imaging.
- Radioimmuno- and peptide-based imaging: In-111 can be chelated to antibodies or peptides for tumor imaging.

- How it’s used in practice: Not something you buy off the shelf. It’s prepared and administered by licensed radiopharmacy services in a clinical setting, typically as part of a specific radiopharmaceutical kit or protocol.

- Safety notes: As with all radiopharmaceuticals, it requires appropriate facilities, shielding, dose calculation, and patient monitoring under regulatory guidelines. Not used in pregnancy.

If you can share what you want to know specifically (chemical properties, imaging uses, typical doses, how it’s prepared, or regulatory considerations), I can tailor the details.