Data / Federal rules / 2026-14994

Significant New Use Rule on a Certain Chemical Substance; Multi-Walled Carbon Nanotubes

The Environmental Protection Agency published this final rule in the Federal Register on July 24, 2026. It took effect on September 22, 2026.

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What the agency says

EPA is issuing a significant new use rule (SNUR) under the Toxic Substances Control Act (TSCA) for a certain chemical substance that was the subject of a premanufacture notice (PMN) and is also subject to an Order issued by EPA pursuant to TSCA. The SNUR requires persons to notify EPA at least 90 days before commencing the manufacture (defined by statute to include import) or processing of this chemical substance for an activity that is designated as a significant new use in the SNUR. The required notification initiates EPA's evaluation of the conditions of that use for that chemical substance. In addition, the manufacture or processing for the significant new use may not commence until EPA has conducted a review of the required notification; made an appropriate determination regarding that notification; and taken such actions as required by that determination.

Key facts

Document number: 2026-14994
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: July 24, 2026
Takes effect: September 22, 2026
Dates: This rule is effective on September 22, 2026. For purposes of judicial review, this rule shall be promulgated at 1 p.m. (EST) on August 7, 2026.
Docket: EPA-HQ-OPPT-2025-2169; FRL-13126-02-OCSPP
Regulation ID (RIN): 2070-AB27
Code of Federal Regulations: 40 CFR 721
Topics: Chemicals; Environmental protection; Hazardous substances; Reporting and recordkeeping requirements
Pages: 5

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 July 2026

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.