2853.90.50.00 - Of other metals or nonmetals

This HTS category, 2853.90.50.00, encompasses various inorganic compounds of metals or nonmetals, specifically excluding those already classified under other subheadings within 2853. This broad category captures a diverse range of chemical substances that do not fit into more specific classifications. The key criterion for inclusion is the absence of classification elsewhere, particularly concerning amalgams of precious metals or specific copper phosphides.

It is crucial to differentiate this category from its sibling, 2853.90.10.00. The sibling category is narrowly defined for copper phosphides (phosphor copper) that contain a specific proportion of phosphorus, exceeding 15 percent by weight. Therefore, 2853.90.50.00 serves as a residual category for other phosphides and inorganic compounds, provided they do not meet the detailed composition and material requirements of the sibling.

As this is a leaf node in the HTS database, there are no further subcategories. Classification under 2853.90.50.00 hinges on thoroughly reviewing the chemical composition and intended use of the product. If a substance is identified as an inorganic compound or amalgam and is not explicitly described or accounted for in more specific HTS codes within Chapter 28, this subheading is the appropriate designation, provided it does not fall under the specific exclusion of amalgams of precious metals.