2824.90 - Other:

This HTS category, 2824.90, encompasses "Other" lead oxides, excluding lead monoxide (litharge, massicot) which is classified under 2824.10. It broadly covers various compounds of lead and oxygen that do not fall into the specific monoxide classification. The primary focus is on the chemical compounds themselves and their inherent properties as lead oxides.

Distinguishing this category from its sibling, 2824.10, is crucial. While 2824.10 is exclusively for lead monoxide, this residual category captures other forms of lead oxides that are not pure monoxide. This distinction is based on the precise chemical composition and structural form of the lead-oxygen compounds being imported or exported.

The subcategories within 2824.90 further refine the classification of these "other" lead oxides. Specifically, 2824.90.10.00 covers lead suboxide (also known as leady litharge), a distinct compound with a higher lead content than monoxide. Meanwhile, 2824.90.20.00 is designated for red lead and orange lead, which are specific lead oxides (Pb₃O₄ and Pb₂O₃ respectively) with characteristic colors and applications. The final subcategory, 2824.90.50.00, serves as a catch-all for any remaining lead oxide compounds not specifically defined in the preceding subcategories, ensuring comprehensive coverage within the broader classification of lead oxides.