2620.91.00.00 - Containing antimony, beryllium, cadmium, chromium or their mixtures

This HTS category, 2620.91.00.00, encompasses slag, ash, and residues, other than those derived from the manufacture of iron or steel, that specifically contain antimony, beryllium, cadmium, chromium, or mixtures thereof. These materials are typically byproducts of various industrial processes, such as smelting or refining of non-ferrous metals. The presence and significant content of these specific metals or their compounds are the defining characteristics for classification under this heading.

While other categories within 2620.91 address different compositions of slag, ash, and residues, this subcategory is exclusively for those where antimony, beryllium, cadmium, or chromium are the primary metallic constituents or are present in combination. It is crucial to differentiate these from other "other" residues (2620.99) which may contain different combinations of metals or primarily non-metallic components. The focus remains on the defined set of heavy metals.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, the classification of goods under 2620.91.00.00 hinges entirely on the accurate identification and quantification of antimony, beryllium, cadmium, or chromium as principal metallic components within the slag, ash, or residue. This necessitates careful analysis of the material's composition.