USA – High-Priority Substance Designations Under the Toxic Substances Control Act (TSCA) and Initiation of Risk Evaluation on High-Priority Substances; Notice of Availability

Under the Toxic Substances Control Act (TSCA) and related implementing regulations, EPA is designating five chemicals as High- Priority Substances for risk evaluation. This document provides the identity of five chemical substances for final designation as High-Priority Substances for risk evaluation, EPA’s rationale for final designation as High-Priority Substances, and instructions on how to access the chemical-specific information, analysis, and basis EPA used to support final designations for the chemical substances. A designation of a substance as a High-Priority Substance is not a finding of unreasonable risk. Rather, the designation of these chemical substances as high priority constitutes the initiation of evaluation of associated risk. The designations of High-Priority Substances for risk evaluation in this notice are effective December 18, 2024. 89 Federal Register (FR) 102900, 18 December 2024​ : ​This and other actions notified under the symbol G/TBT/N/USA/2133 are identified by Docket Number EPA-HQ-OPPT-2023-0601. The Docket Folder is available on Regulations.gov at https://www.regulations.gov/docket/EPA-HQ-OPPT-2023-0601/document​ and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number.

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