Below are the prepublication version of "High-Priority Substance Designations under the Toxic Substances Control Act (TSCA) and Initiation of Risk Evaluation on High-Priority Substances; Notice of Availability" and the Response to Comments document.

Return to the Chemical Substances Undergoing Prioritization: High Priority page.

• Prepublication Version of High-Priority Substance Designations (PDF)(44 pp, 808 K)
• Response to Comments on the Initiation of Prioritization and the Proposed High-Priority Substance Designations (PDF)(37 pp, 461 K)