On December 30, 2019 (84 FR 71924), the Environmental Protection Agency (EPA) published a notice in the federal register about designating 20 chemical substances as High-Priority Substances for risk evaluation. This document identifies the final designations and the EPA’s rationale for the chemical substances and provides instructions on how to access the chemical-specific information, analysis and basis used by the EPA 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. However, the designation of these chemical substances as high-priority substances constitutes the initiation of the risk evaluations on the substances. The designations of High-Priority Substances for risk evaluation in this notice are effective December 20, 2019.

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EPA 12-30-2019 notice TSCA 20 High-Priority Substance Designations