# Nuclide record specific-activity (term). 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/terms/specific-activity/>
  a schema:DefinedTerm ;
  nuclide:kind "term" ;
  schema:identifier "specific-activity" ;
  schema:name "Specific activity and molar activity"@en ;
  schema:description "A measure of how much of a radioactive drug is genuinely radioactive versus how much is ordinary, non-radioactive filler of the same molecule. Higher specific activity means more radioactive atoms are packed onto the targeting molecules, so fewer 'cold' (non-radioactive) copies compete for the same receptors."@en ;
  schema:url <https://nuclide.cc/terms/specific-activity/> ;
  schema:dateModified "2026-09-22"^^xsd:date ;
  schema:citation <https://www-pub.iaea.org/MTCD/Publications/PDF/TE-1856web.pdf>, <https://pmc.ncbi.nlm.nih.gov/articles/PMC5852186/> ;
  nuclide:related <https://nuclide.cc/terms/no-carrier-added/>, <https://nuclide.cc/terms/chelator-term/>, <https://nuclide.cc/isotopes/f-18/>, <https://nuclide.cc/isotopes/zr-89/> ;
  nuclide:technologies <https://nuclide.cc/technologies/pet-tracer-manufacturing/>, <https://nuclide.cc/technologies/radiopharmaceutical-gmp-release/>, <https://nuclide.cc/technologies/sstr-pet/>, <https://nuclide.cc/technologies/psma-pet/> .