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Assessing and Managing Chemicals under TSCA

Industry Testing Requirements under TSCA Section 4

Under the Toxic Substances Control Act (TSCA), EPA has broad authority to issue regulations designed to require manufacturers (including importers) or processors to test chemical substances and mixtures (TSCA Section 4: Test Requirements). EPA also works with members of the U.S. chemical industry to develop needed data via TSCA Section 4 Enforceable Consent Agreements (ECAs).

This testing is required to develop data about health or environmental effects when there is insufficient data for EPA risk assessors to be able to determine whether a chemical substance or mixture presents an unreasonable risk to health or the environment.

Read EPA’s regulations governing testing requirements under Section 4 of TSCA.

View a list of all chemicals and mixtures that are presently, or have been, subject to final TSCA Section 4 test rules or TSCA Section 4 enforceable consent agreements/orders (ECAs).