EPA is amending the deadline for reporting pursuant to the Toxic Substances Control Act (TSCA) Health and Safety Data Reporting rule, which requires manufacturers (including importers) of 50 specified chemical substances to report certain lists and copies of unpublished health and safety studies to EPA. Specifically, EPA will be amending the deadline from September 27, 2021 to December 1, 2021 for 20 of the 50 chemical substances and to January 25, 2022 for 30 of the 50 chemical substances. The Health and Safety Data Reporting Rule, promulgated pursuant to TSCA section 8(d), requires manufacturers (including importers) of certain chemical substances to submit lists and copies of certain unpublished health and safety studies to EPA.