2836.99.50 - Other

This HTS code, 2836.99.50, falls under the broader category of "Other" carbonates within the "Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate" heading. It serves as a residual classification for inorganic carbonate compounds that are not specifically enumerated in preceding subheadings. Essentially, it captures various metal or non-metal carbonates that do not fit into more specific classifications, provided they meet the general requirements of Chapter 28 for inorganic chemical products.

To differentiate this category from its siblings, it's important to note that 2836.99.50 is distinct from the explicitly listed cobalt carbonates (2836.99.10.00), bismuth carbonate (2836.99.20.00), commercial ammonium carbonate and other ammonium carbonates (2836.99.30.00), and lead carbonates (2836.99.40.00). This subheading is intended for any other carbonate compounds not covered by these specific entries.

The subcategories under 2836.99.50 provide further refinement. 2836.99.50.10 specifically classifies zirconium carbonates. The remaining items within this broader "Other" classification, which do not qualify as zirconium carbonates, are then placed under the more specific residual subheading 2836.99.50.50, ensuring a comprehensive and hierarchical classification of all remaining inorganic carbonate compounds.