2804.50.00.20 - Tellurium

This HTS category, 2804.50.00.20, specifically covers tellurium. Tellurium is a metalloid element with the chemical symbol Te and atomic number 52. It is typically found in a silvery-white crystalline form and is known for its semiconductor properties. In its elemental form, it is used in various industrial applications, including metallurgy, semiconductors, solar cells, and as an alloying agent to improve the machinability and properties of metals like copper and stainless steel.

At this level of classification, 2804.50.00.20 is distinct from its sibling category, 2804.50.00.10, which covers boron. While both are nonmetallic elements classified under the broader heading of "Hydrogen, rare gases and other nonmetals," boron possesses different chemical and physical properties and finds application in distinct industries, such as in ceramics, detergents, and as a component in nuclear reactors. This specific classification ensures accurate distinction between these two unique elemental substances.

As this is a leaf node within the HTS structure, there are no further subcategories under 2804.50.00.20. Therefore, the classification for tellurium ends at this specific HTS code, encompassing all forms and purities of elemental tellurium. Classification relies on the identity of the substance as tellurium, irrespective of its specific physical form (e.g., powder, lump, ingot) or grade, provided it is the pure element.