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Request for Public Comment on the Draft Immediately Dangerous to Life or Health (IDLH) Value Document for Lewisite

Health and Human Services Department / Centers for Disease Control and Prevention

Federal Register summary (shortened to 600 characters)

The National Institute for Occupational Safety and Health (NIOSH) in the Centers for Disease Control and Prevention (CDC), an Operating Division of the Department of Health and Human Services (HHS), requests public comment on the draft Immediately Dangerous to Life or Health (IDLH) Value Profile document for the chemical lewisite (CAS# 541-25-3). NIOSH develops IDLH values for workplace chemical concentrations and conditions carrying immediate, unacceptable health risks. IDLH values are based on health effects considerations determined through a critical assessment of toxicology and human…

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Document number
2026-05288
Published
Wed, Mar 18, 2026
Comments close
Mon, May 18, 2026Closed
First on the line
Oct 10, 2026, 10:00 PM