Strontium Sr-89

**Semantic type:** Element, Ion, or Isotope|Pharmacologic Substance

**Definition:** A radioisotope of strontium, a heavy metal found naturally as a non-radioactive element. With a half-life of 50 days, strontium-89 is a beta emitter that is metabolized much like calcium. This agent is preferentially absorbed by osteoblastic bone metastases. (NCI04)

**Synonyms:** - STRONTIUM SR-89 - Strontium-89 - strontium-89