EPA issues Federal Register notice and EPA webpage update detailing process for expiring TSCA CBI claims beginning June 2026 (CDX extension requests required)

EPA published an official process/timeline update for confidential business information (CBI) claims under TSCA that will begin expiring starting June 2026 (generally 10 years after submission). EPA explains it will post (in early spring) a first public list of submissions with expiring CBI claims, and will send direct notices via EPA’s CDX system. Companies seeking to maintain confidentiality must submit extension requests electronically via CDX no later than 30 days before the specific claim expiration date, including substantiation. This is operationally significant for TSCA compliance teams managing CBI portfolios and ensuring timely substantiation/extension workflows.