Public CommentProposedPublic CommentProposed Regulation
OEHHA proposes NSRL safe harbor levels for 1‑bromopropane and diethanolamine (dermal) and extends comment deadline
California Proposition 65California Environmental Protection Agency – Office of Environmental Health Hazard Assessment (OEHHA)US (California)
Announced
Sep 19, 2025
Description
OEHHA issued a proposed rulemaking to amend Title 27, California Code of Regulations, section 25705 (No Significant Risk Levels for carcinogens) to add new safe harbor NSRLs: 1‑bromopropane at 54 µg/day and diethanolamine (dermal exposure only) at 6.4 µg/day. OEHHA also issued an extension notice moving the public comment deadline to November 7, 2025. If finalized, these NSRLs would affect Proposition 65 warning determinations and risk assessments for products or workplaces involving these substances, particularly for dermal exposure scenarios for diethanolamine.
Sources
- OfficialProposed Rulemaking: Title 27 California Code of Regulations, Section 25705 No Significant Risk Level for 1-Bromopropane and Diethanolamine (Dermal) - OEHHA
- Official[PDF] Notice of Proposed Rulemaking Amendment to Section 25705
- Official[PDF] Extension Notice 1-BP and DEA NSRLs
- Official[PDF] Initial Statement of Reasons: 1-Bromopropane and Diethanolamine (dermal)
- Official[PDF] Proposed regulatory text 1-BP and DEA NSRLs