Uranium-235 (²³⁵U) and natural uranium

Safety Summary

Regulatory Status

Sources

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

• US EPA Radionuclide Basics: Uranium (natural/depleted/enriched; alpha emitter; nephrotoxic) REGULATORY · 2020
• ATSDR: Toxicological Profile for Uranium — Renal Proximal Tubule Damage, Pediatric GI Absorption (2-4× Adults), Depleted Uranium Veterans Studies, Western US Groundwater Geology, Gulf War DU Exposure Assessment, and EPA MCL Basis (2013) REGULATORY · 2013
• § 141.66 Maximum contaminant levels for radionuclides. REGULATORY
• Federal Register :: National Primary Drinking Water Regulations; Radionuclides; Final Rule REGULATORY
• 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): uranium is Group 1 ONLY via the internally-deposited alpha-emitter category. IARC found LIMITED evidence in humans for the carcinogenicity of mixtures of uranium isotopes (sufficient in animals) — uranium is NOT individually a settled Group-1 human carcinogen. 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.