A Guide to Importing Chemical Substances Under TSCA – and a Warning

Short summary

This legal guide explains TSCA section 13 requirements for importing chemical substances into the U.S., including Inventory checks, PMN filings for new substances, and available exemptions. A June 2025 Executive Order (EO 14411) strengthens customs enforcement, increasing scrutiny on chemical importers. Importers must verify whether substances are on the TSCA Inventory and comply with premanufacture notice rules or face strict liability violations.

• •EO 14411 strengthens customs enforcement, increasing scrutiny on chemical imports
• •Importers must check TSCA Inventory; new substances require PMN or exemption
• •Even good-faith mistakes about Inventory status can be strict liability violations

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