2830.90 - Other:

This category, HTS Code 2830.90, encompasses sulfides and polysulfides, whether or not chemically defined, that are not specifically provided for under the preceding subheadings of Chapter 28. It serves as a residual category for a range of inorganic sulfur compounds.

Distinguishing itself from its sibling category, 2830.10.00.00 (Sodium sulfides), this subheading includes sulfides of elements other than sodium. For instance, while sodium sulfide is explicitly classified under 2830.10, this "Other" category accounts for a broader spectrum of sulfur-containing inorganic compounds.

The subcategories within 2830.90 further refine the classification of these diverse compounds. This includes specific provisions for Zinc sulfide, both luminescent grade with high purity (2830.90.10.00) and other forms (2830.90.15.00), as well as Cadmium sulfide (2830.90.20.00). The residual category, "Other" (2830.90.90.00), captures any remaining sulfides and polysulfides not meeting the criteria of the more specific subheadings within this group.