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

Document 2026-14994 is a Final Rule published by the Environmental Protection Agency in the Federal Register on July 24, 2026, with an effective date of September 22, 2026. 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. View the original at https://www.federalregister.gov/documents/2026/07/24/2026-14994/significant-new-use-rule-on-a-certain-chemical-substance-multi-walled-carbon-nanotubes.

No. Document 2026-14994 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.