EPA posts latest TSCA Inventory update notice (page updated Jan. 23, 2026)

EPA posted a notice that the latest biannual TSCA Chemical Substance Inventory update has been released. The notice indicates updates to Inventory-related metadata (e.g., activity data/unique identifiers/regulatory flags) and continued movement of some substances from the confidential to the public portion as part of TSCA CBI review efforts. Compliance teams should refresh internal Inventory reference datasets used to confirm Inventory status and related flags when screening substances for U.S. manufacture/import.