2846.90.80 - Other

This HTS classification covers compounds, inorganic or organic, of rare-earth metals, of yttrium, or of scandium, as well as mixtures of these metals, that do not fall under more specific provisions within heading 2846. It is intended for materials where the rare-earth, yttrium, or scandium metal content does not meet the precise compositional requirements of other subheadings, or where the specific form or application is not otherwise enumerated.

Distinguishing this category from its sibling, 2846.90.40.00 (Yttrium bearing materials and compounds containing by weight more than 19 percent but less than 85 percent yttrium oxide equivalent), is crucial. The sibling category specifically addresses yttrium compounds with a defined yttrium oxide equivalent percentage range. This "Other" category encompasses all other rare-earth, yttrium, or scandium compounds and mixtures thereof that fall outside this specific yttrium concentration threshold.

The subcategory 2846.90.80.90, "Other," further refines this classification by capturing any remaining materials that fit under the broader 2846.90.80 heading but are not specifically designated as "Mixtures of rare-earth carbonates other than of cerium carbonate." This highlights the hierarchical nature of classification, ensuring that even specialized subgroups are accounted for.