2846.90 - Other:

This HTS category, 2846.90, encompasses inorganic or organic compounds of rare-earth metals, yttrium, or scandium, as well as mixtures of these metals, that are not specifically classified under other headings within Chapter 28. It serves as a residual category for a diverse range of compounds containing these unique metallic elements.

Distinguishing this category from its sibling, 2846.10.00 (Cerium compounds), is straightforward: 2846.10.00 is exclusively for compounds of cerium. This current category, 2846.90, is for compounds of other rare-earth metals, yttrium, scandium, or mixtures thereof, provided they are not specifically provided for elsewhere. The key differentiator is the elemental composition beyond cerium, or the presence of mixtures.

Within this residual category, further subdivisions exist to provide more granular classification. The subcategory 2846.90.20 specifically addresses mixtures of rare-earth oxides or of rare-earth chlorides. This highlights the importance of the specific form (oxide or chloride) and the fact that these are mixtures, separating them from single-element compounds or other compound types that might fall under the broader "Other" designation.