An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Assessing and Managing Chemicals under TSCA

Final Scope Documents for High-Priority Chemicals Undergoing Risk Evaluation

In December 2019, EPA designated 20 High-Priority substances to undergo risk evaluation under the Toxic Substances Control Act (TSCA). The final scope documents for these substances are available below. Also below is EPA's response to comments received on the draft scope documents, released in April 2020.  You can find additional information in the docket relevant to this action (EPA-HQ-OPPT-2019-0131) or in the individual dockets for each of the chemicals. View the final list of businesses subject to fees for these 20 risk evaluations.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.