Iodine-131 (¹³¹I)

Safety Summary

Regulatory Status

Sources

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

• WHO: Chernobyl — Iodine-131 Release and Childhood Thyroid Cancer, 6,000+ Post-Accident Cases in Belarus/Ukraine, Milk Contamination Pathway, Potassium Iodide Distribution Failure, and 20-Year Follow-Up of Thyroid Cancer Cohort (2006) REGULATORY · 2006
• US EPA Radionuclide Basics: Iodine (incl. Iodine-131, ~8-day half-life; thyroid-seeking) REGULATORY · 2020
• where to look IARC Monographs — Monographs available (index) REGULATORY · 2026
• OEHHA Proposition 65 List of Carcinogens or Reproductive Toxicants (CSV, list date 31-Jul-26) REGULATORY
• Permissible Exposure Limits – OSHA Annotated Table Z-1 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: Radiation 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.