# Nuclide record at-211 (isotope). Data CC BY-NC 4.0, attribute "Data from Nuclide (nuclide.cc)". Whole corpus: https://nuclide.cc/api/v1/nuclide.nt
@prefix schema: <https://schema.org/> .
@prefix nuclide: <https://nuclide.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://nuclide.cc/isotopes/at-211/>
  a schema:ChemicalSubstance ;
  nuclide:kind "isotope" ;
  schema:identifier "at-211" ;
  schema:name "Astatine-211"@en ;
  schema:alternateName "211At"@en, "At-211"@en ;
  schema:description "A radioactive halogen, chemically similar to iodine, that gives off a single powerful short-range particle as it decays. It has to be made in a particular kind of accelerator and used within hours, which is why only a handful of centres worldwide can supply it."@en ;
  schema:url <https://nuclide.cc/isotopes/at-211/> ;
  schema:dateModified "2026-09-22"^^xsd:date ;
  schema:citation <https://pmc.ncbi.nlm.nih.gov/articles/PMC3503149/>, <https://pmc.ncbi.nlm.nih.gov/articles/PMC12929731/>, <https://ionetix.com/2026/09/01/ionetix-begins-shipping-astatine-211-to-support-preclinical-and-clinical-trials/> ;
  nuclide:status "phase-1" ;
  nuclide:tag "therapy", "alpha emitter", "halogen", "supply-constrained" ;
  nuclide:related <https://nuclide.cc/technologies/astatine-211-alpha-therapy/>, <https://nuclide.cc/technologies/targeted-alpha-therapy/>, <https://nuclide.cc/technologies/cyclotron-isotope-production/>, <https://nuclide.cc/ideas/idea-reg-alpha-emitter-portfolio/> .