2846.90.20.82 - Containing yttrium or scandium as the predominant metal

This HTS subcategory, 2846.90.20.82, specifically classifies inorganic or organic compounds that contain yttrium or scandium as the predominant metal. These substances are within the broader group of compounds of rare-earth metals, yttrium, or scandium, or mixtures thereof. The key characteristic for classification here is the presence of either yttrium or scandium in a quantity that exceeds other rare-earth metals, if any are present. This category encompasses a variety of chemical forms, including oxides, salts, and organometallic compounds where yttrium or scandium is the primary metallic component.

This classification is distinct from its sibling category, 2846.90.20.84, which covers "Other" mixtures of rare-earth oxides or chlorides not falling under the specific predominant metal criteria of 2846.90.20.82. Therefore, if a mixture primarily consists of rare-earth oxides or chlorides but does not have yttrium or scandium as the predominant metal, it would be classified under the sibling. Conversely, any compound where yttrium or scandium clearly outweighs other rare-earth metals, regardless of whether it's an oxide or chloride, falls into this specific subcategory.

As this is a leaf node in the HTS classification, there are no further subcategories to introduce. The classification is definitive at this level, based on the presence of yttrium or scandium as the predominant metal in the compound. Practical classification hinges on laboratory analysis or manufacturer specifications confirming the dominant metallic element. Examples might include yttrium oxide with trace amounts of other rare earths, or scandium chloride where scandium is the primary component.