2842.90.90 - Other

This HTS category, 2842.90.90, encompasses "Other" inorganic salts not specifically enumerated in preceding subheadings of 2842. This classification covers a broad range of inorganic salts derived from various inorganic acids or peroxoacids. Crucially, it includes aluminosilicates, whether or not they possess a precisely defined chemical composition. These substances can be found in numerous industrial applications, ranging from catalysts and adsorbents to components in ceramics and building materials, and often exhibit varied physical forms such as powders, granules, or crystalline structures.

Distinguishing this "Other" category from its sibling, 2842.90.10.00 (Fulminates, cyanates and thiocyanates), is essential. While both fall under the broader heading of other salts of inorganic acids or peroxoacids, the sibling specifically isolates compounds containing fulminate, cyanate, and thiocyanate anions. Therefore, any inorganic salt of an inorganic acid or peroxoacid that does not possess these specific anionic groups, and is not otherwise specifically classified, will fall into the 2842.90.90 category.

Within the "Other" classification of 2842.90.90, further subdivisions exist to provide more granular categorization. These subcategories, such as 2842.90.90.10 (Selenides and tellurides) and 2842.90.90.50 (Other), acknowledge the distinct chemical properties and applications of specific compound groups. The presence of selenides and tellurides as a separate subdivision highlights their unique characteristics and potential uses, often in semiconductor technology and specialized chemical synthesis. The remaining "Other" subcategory serves as a residual classification for all remaining inorganic salts and aluminosilicates that do not fit into the more specific subdivisions.