Significant New Use Rule on a Certain Chemical Substance; Multi-Walled Carbon Nanotubes
What happened
The EPA issued a Significant New Use Rule (SNUR) under the Toxic Substances Control Act (TSCA) for multi-walled carbon nanotubes. Signed by Donald Trump, this rule requires persons to notify EPA at least 90 days before starting new manufacturing or processing activities for this chemical substance. This action was effective on September 22, 2026, and implements a previously proposed rule finalized for P-22-163.
Why it matters
This rule ensures that the EPA evaluates potential new uses of multi-walled carbon nanotubes before they begin, allowing the agency to determine if regulatory actions are needed. It creates a mandatory notification process, preventing immediate commencement of significant new uses until EPA's review and determination are complete. Businesses will incur estimated costs of $45,000 for large businesses and $14,500 for small businesses per notification submission.
Who it affects
- ›Manufacturers of multi-walled carbon nanotubes
- ›Processors of multi-walled carbon nanotubes
- ›Chemical manufacturing industry (NAICS 325)
- ›Petroleum refineries (NAICS 324110)
- ›Importers and exporters of the substance
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