U.S. EPA’s IRIS Toxicological Review of Inorganic Arsenic: Non-cancer and Cancer Health Outcomes and Derived Toxicity Values
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Abstract based on final IRIS assessment of inorganic arsenic for poster presentation at 2025 SOT annual meeting.
Inorganic arsenic (iAs, CASRN 7440-38-2) is a naturally occurring compound that can be found in water, food, soil, and air. In addition, iAs can be released into the environment through industrial processes and emissions. Exposure to iAs is possible via ingestion of drinking water and food, inhalation of air, and dermal contact. In January 2025, US Environmental Protection Agency (EPA)’s IRIS program finalized a health assessment for iAs. This assessment was developed at the request of multiple EPA National and Regional Programs.