Public CommentProposedPublic CommentGuidance Update
NIOSH requests public comment on draft IDLH Value Document for lewisite (CAS 541-25-3)
NIOSHNational Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), U.S. Department of Health and Human Services (HHS)US
Announced
Mar 18, 2026
Description
NIOSH published a Federal Register notice requesting public comment on a draft Immediately Dangerous to Life or Health (IDLH) Value Document for lewisite (CAS 541-25-3). While not a binding rule, IDLH values are widely used in industrial hygiene and emergency response planning (e.g., respiratory protection selection, confined space and incident response procedures). Stakeholders should review the draft IDLH rationale and submit technical comments by the stated deadline.