Isotopes of bromine

Isotopes of bromine (35Br)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
75Br synth 96.7 min β+ 75Se
76Br synth 16.2 h β+ 76Se
77Br synth 57.04 h β+ 77Se
79Br 50.6% stable
80Br synth 17.68 min β− 80Kr
80mBr synth 4.4205 h IT 80Br
81Br 49.4% stable
82Br synth 35.282 h β− 82Kr
Standard atomic weight Ar°(Br)

Bromine (35Br) has two stable isotopes, 79Br and 81Br, and 35 known radioisotopes, the most stable of which is 77Br, with a half-life of 57.036 hours.

Like the radioactive isotopes of iodine, radioisotopes of bromine, collectively radiobromine, can be used to label biomolecules for nuclear medicine; for example, the positron emitters 75Br and 76Br can be used for positron emission tomography.[4][5] Radiobromine has the advantage that organobromides are more stable than analogous organoiodides, and that it is not uptaken by the thyroid like iodine.[6]

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  2. ^ "Standard Atomic Weights: Bromine". CIAAW. 2011.
  3. ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  4. ^ Coenen, Heinz H.; Ermert, Johannes (January 2021). "Expanding PET-applications in life sciences with positron-emitters beyond fluorine-18". Nuclear Medicine and Biology. 92: 241–269. doi:10.1016/j.nucmedbio.2020.07.003. PMID 32900582.
  5. ^ Welch, Michael J.; Mcelvany, Karen D. (1 October 1983). "Radionuclides of Bromine for Use in Biomedical Studies". Ract. 34 (1–2): 41–46. doi:10.1524/ract.1983.34.12.41.
  6. ^ Lambert, F.; Slegers, G.; Hermanne, α.; Mertens, J. (1 June 1994). "Production and Purification of 77 Br Suitable for Labeling Monoclonal Antibodies Used in Tumor Imaging". Ract. 65 (4): 223–226. doi:10.1524/ract.1994.65.4.223.