The EPA administers asbestos import controls under the Toxic Substances Control Act (TSCA). Most uses of asbestos are prohibited or severely restricted in the US, and importers must ensure compliance with applicable TSCA rules before shipment. Certain legacy or research-related imports may require specific EPA review.

Crocidolite, or blue asbestos, is a sodium iron silicate amphibole fiber classified separately under 252410 because of its distinct mineralogy and recognized hazard profile. All other asbestos varieties — including chrysotile (white asbestos) and amosite (brown asbestos) — fall under 252490. Mineralogical testing or supplier documentation is typically required to confirm fiber type at entry.