EPA Invites Experts for Peer Review of Draft D4 Risk Evaluation

The U.S. Environmental Protection Agency (EPA) is seeking nominations of qualified scientists to serve as peer reviewers for the draft risk evaluation of octamethylcyclotetrasiloxane (D4) under the Toxic Substances Control Act (TSCA). The peer review will be conducted by the Science Advisory Committee on Chemicals (SACC). 

Call for Nominations 

EPA invites nominations of experts by September 25, 2025. Each nomination should include the candidate’s name, affiliation, and contact information, and must be emailed to the OCSPP Peer Review mailbox: OCSPP-PeerReview@epa.gov. 
EPA expects to select seven to eight ad hoc reviewers to assist SACC. 

Areas of Expertise Sought 

EPA is particularly interested in scientists with expertise in: 

Conflict of Interest Review 

Selected reviewers will need to submit confidential financial disclosure forms. EPA will review these to ensure there are no conflicts of interest or prior involvement in relevant scientific analyses. 

Selection and Public Meeting 

EPA’s final reviewer selection will ensure: 

The peer review will take place during a virtual public meeting in December 2025. EPA will announce the official meeting dates soon. 

Contact 

For additional details, please contact: 
Dr. Alaa Kamel 
Designated Federal Official 
Email: kamel.alaa@epa.gov