Certain articles of thallium classified under HTS 8112590000 may be subject to Section 301 tariffs depending on the specific product and the applicable list under the US-China trade action. Importers should verify the current Section 301 list coverage for this HTS line with CBP or a licensed customs broker, as applicability and rates have been subject to ongoing review and modification.

The primary end uses for fabricated thallium articles include infrared optical components (thallium bromoiodide crystals), specialty low-melting-point alloys, and certain semiconductor and photovoltaic research applications. Demand volumes are small relative to most industrial metals, making this a niche market where a single large buyer or research program can meaningfully shift import flows.