United States of America
Significant New Use Rules on Certain Chemical Substances (19-5.B)

AGENCY: Environmental Protection Agency (EPA)

ACTION: Final rule

SUMMARY: EPA is issuing significant new use rules (SNURs) under the Toxic Substances Control Act (TSCA) for chemical substances which are the subject of premanufacture notices (PMNs). This action requires persons to notify EPA at least 90 days before commencing manufacture (defined by statute to include import) or processing of any of these chemical substances for an activity that is designated as a significant new use by this rule. The required notification initiates EPA's evaluation of the chemical under the conditions of use within the applicable review period. Persons may not commence manufacture or processing for the significant new use until EPA has conducted a review of the Significant New Use Notice (SNUN), made an appropriate determination on the SNUN, and has taken such actions as are required as a result of that determination.

DATES: This rule is effective on 2 October 2020. For purposes of judicial review, this rule shall be promulgated at 1 p.m. (e.s.t.) on 17 August 2020.

This final rule and the proposed rule notified as G/TBT/N/USA/1525 are identified by Docket Number EPA-HQ-OPPT-2019-0495.  The Docket Folder is available on at, and provides access to primary and supporting documents as well as comments received. Documents are also accessible from by searching the Docket Number.

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Chemical substances

Substances chimiques; Protection de l'environnement (ICS 13.020), Production dans l'industrie chimique (ICS 71.020), Chimie minérale (ICS 71.060), Chimie organique (ICS 71.080), Produits de l'industrie chimique (ICS 71.100)
Sustancias químicas; Protección del medio ambiente (ICS: 13.020); Producción de la industria química (ICS: 71.020); Productos químicos inorgánicos (ICS: 71.060); Productos químicos orgánicos (ICS: 71.080); Productos de la industria química (ICS: 71.100).
Version Products covered Interpreted
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Products covered Interpreted
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Notification objective

Notified Under Article


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