Significant New Use Rule on a Certain Chemical Substance; Multi-Walled Carbon Nanotubes
EPA issued a Significant New Use Rule (SNUR) for multi-walled carbon nanotubes, requiring 90-day advance notice before manufacturing, importing, or processing for a significant new use.
Aforeworn detected this change in the Environmental & Emissions Compliance (EPA) space on July 29, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated High urgency. Manufacturers, importers, and processors of multi-walled carbon nanotubes subject to the SNUR. should confirm how it applies to their specific situation before acting. There is a time constraint attached: 90 days before commencing the significant new use activity.. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Environmental & Emissions Compliance (EPA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
Any person intending to manufacture, import, or process multi-walled carbon nanotubes for a significant new use must submit a Significant New Use Notice (SNUN) to EPA at least 90 days before commencing that activity.
Who it affects
Manufacturers, importers, and processors of multi-walled carbon nanotubes subject to the SNUR.
What you must do
Submit a SNUN to EPA at least 90 days before starting any significant new use of multi-walled carbon nanotubes.
Deadline
90 days before commencing the significant new use activity.
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