2842.90.90.10 - Selenides and tellurides

This HTS category, 2842.90.90.10, specifically covers selenides and tellurides. These are inorganic chemical compounds formed by the combination of selenium or tellurium with one or more other elements, typically metals or nonmetals. Examples include compounds like selenium dioxide (SeO2), tellurium dioxide (TeO2), or metal selenides and tellurides such as cadmium selenide (CdSe) or lead telluride (PbTe). These substances are often utilized in specialized applications within electronics, pharmaceuticals, and materials science.

Within the broader heading of "Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides," this subcategory is distinct. While other provisions at this level might encompass various inorganic salts and compounds, 2842.90.90.10 is precisely targeted at those containing selenium or tellurium as key anionic components.

As this is a leaf node within the HTS classification, there are no further subcategories to introduce. Therefore, classification within 2842.90.90.10 relies on accurately identifying the presence and nature of selenide or telluride compounds, distinguishing them from other inorganic salts and compounds that may fall under different subheadings within the 2842.90.90 range or other chapters entirely.