8106.10.00.00 - Containing more than 99.99 percent of bismuth, by weight

This HTS category, 8106.10.00.00, specifically covers bismuth when it is present in a highly purified form, containing more than 99.99 percent of bismuth by weight. This classification applies to the refined metal itself, in various forms such as ingots, powders, or bars, as long as it meets the stringent purity requirement. The principal use of such high-purity bismuth is often in specialized applications within the electronics, pharmaceutical, or chemical industries where minimal impurities are critical for performance.

This category is distinguished from its sibling category, 8106.90.00.00, which covers all other bismuth and articles thereof not meeting the purity threshold defined here. Essentially, 8106.10.00.00 is for the extremely pure form of the metal, while the "Other" category encompasses less refined bismuth, bismuth alloys, or articles manufactured from bismuth that do not meet the 99.99% purity specification.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification decisions under this heading will therefore hinge solely on the precise bismuth content by weight. Importers and exporters must ensure their documentation accurately reflects the purity of the bismuth being declared to correctly fall under this specific code or the residual "Other" category.