2846.90.40.00 - Yttrium bearing materials and compounds containing by weight more than 19 percent but less than 85 percent yttrium oxide equivalent

This HTS category, 2846.90.40.00, specifically covers yttrium-bearing materials and compounds that contain a precise yttrium oxide equivalent by weight. The specified range is more than 19 percent but less than 85 percent yttrium oxide equivalent. This meticulous percentage-based definition is crucial for classifying these specialized yttrium compounds and differentiates them from other yttrium-related materials.

The primary distinguishing factor for this classification lies in its defined yttrium oxide content range. It is distinct from the "Other" category (2846.90.80) at the same level, which would encompass yttrium-bearing materials that fall outside this specific percentage range. Therefore, the exact quantitative analysis of yttrium oxide equivalent is the key determinant for goods falling under this heading.

As this is a leaf node within the HTS classification system, there are no further subcategories. Classification under 2846.90.40.00 is final once the material meets the specified yttrium oxide content criteria. Importers and exporters must ensure accurate laboratory analysis to confirm that their yttrium-bearing products fall within the defined 19% to 85% yttrium oxide equivalent threshold to ensure correct customs declaration.