2836.99.50.10 - Zirconium carbonates

This HTS category, 2836.99.50.10, specifically designates zirconium carbonates. These are inorganic chemical compounds characterized by the presence of zirconium and carbonate ions. Their classification falls under Chapter 28, which encompasses a broad range of inorganic chemicals. Within this chapter, they are grouped with other carbonates and related compounds, reflecting their chemical nature.

Distinguishing this category from its sibling, 2836.99.50.50 "Other," is crucial for accurate tariff application. While both are sub-classifications of "Other" carbonates, 2836.99.50.10 is exclusively for zirconium carbonates. The "Other" sibling category would encompass carbonates of metals not specifically enumerated in preceding subheadings within the 2836.99.50 range, excluding zirconium. Therefore, the defining characteristic here is the presence of zirconium as the metallic component.

As this is a leaf node in the HTS structure, there are no further subcategories to introduce. Classification at this level requires a definitive identification of the imported or exported merchandise as a zirconium carbonate. This typically relies on chemical analysis and the established nomenclature within the Harmonized Tariff Schedule, ensuring that only products meeting the specific definition of zirconium carbonates are assigned to this code.