Data / Federal rules / 2025-19673

Modification of Significant New Use Rules of Certain Chemical Substances (23-1.M)

The Environmental Protection Agency published this proposed rule in the Federal Register on October 28, 2025. Comments closed on November 28, 2025.

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What the agency says

EPA is proposing to amend the significant new use rules (SNURs) for certain chemical substances identified herein, which were the subject of one or more premanufacture notices (PMNs), a Microbial Commercial Activity Notice (MCAN) for one substance, and in some cases significant new use notices (SNUNs). This action would amend the SNURs to (1) allow certain new uses reported in the SNUNs or PMNs without additional notification requirements, (2) modify the significant new use notification requirements based on the actions and determinations for the SNUN or PMN submissions or based on the examination of new test data or other information, and (3) make technical amendments to several SNURs. EPA is proposing these amendments based on our review of new and existing data for the chemical substances.

Key facts

Document number: 2025-19673
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: October 28, 2025
Comments due: November 28, 2025
Dates: Comments must be received on or before November 28, 2025.
Docket: EPA-HQ-OPPT-2022-0863; FRL-12967-01
Regulation ID (RIN): 2070-AB27
Code of Federal Regulations: 40 CFR 721; 40 CFR 725
Topics: Chemicals; Environmental protection; Hazardous substances; Reporting and recordkeeping requirements
Pages: 9

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on chemicals · Rules on environmental protection · Rules on hazardous substances · Published in October 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.