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

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-07-24 |
| Effective | 2026-09-22 |
| Significant | No |
| CFR parts | 40 CFR 721 |
| Summary | 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 |
| Document number | 2026-14994 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/24/2026-14994/significant-new-use-rule-on-a-certain-chemical-substance-multi-walled-carbon-nanotubes). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.