Strontium-90 (⁹⁰Sr)

Safety Summary

Regulatory Status

Sources

These citations are the ones recorded for the human adult context.

• US EPA Radionuclide Basics: Strontium-90 (~29-yr half-life; beta emitter; bone-seeking) REGULATORY · 2020
• CDC: Radiation Emergencies — Strontium-90 Radiological Fact Sheet, Dietary Exposure Routes, Bone Incorporation Mechanism, Calcium Competitive Inhibition, Post-Chernobyl and Post-Fukushima Food Monitoring Programs (2018) REGULATORY · 2024
• where to look IAEA Chernobyl Forum: Environmental and Health Consequences of the Chernobyl Accident — Cs-137 Long-Term Surface Contamination REGULATORY · 2006
• Permissible Exposure Limits – OSHA Annotated Table Z-1 REGULATORY
• OEHHA Proposition 65 List of Carcinogens or Reproductive Toxicants (CSV, list date 31-Jul-26) REGULATORY

The IARC classification shown under Regulatory Status is cited to the source below. It is a record-wide citation for that classification, not a source for the adult risk band.

• IARC Monographs Volume 100D (2012): Strontium-90 is Group 1 via the internally-deposited beta-particle-emitter category / fission-product mixtures. IARC found LIMITED individual evidence for strontium-90 alone — the Group-1 basis is the category, not the standalone nuclide. REGULATORY · 2012

Same data as the API response, which is open and needs no key. The full per-record source list is available to authenticated callers.