2819.10.00.00 - Chromium trioxide

This HTS category, 2819.10.00.00, specifically covers chromium trioxide, also known as chromic acid. It is a powerful oxidizing agent and a key chromium compound used in various industrial applications, including metal finishing (chromic acid plating), wood preservation, and as a component in the production of other chromium chemicals. Its classification here is within Chapter 28, which deals with inorganic chemicals.

Distinguishing this category from its sibling, 2819.90.00.00, is straightforward. While 2819.90.00.00 encompasses "Other" chromium oxides and hydroxides not specifically enumerated, 2819.10.00.00 is exclusively for chromium trioxide, a distinct chemical compound with the formula CrO₃. This specificity ensures that pure chromium trioxide is accurately classified without being grouped with less defined or different chromium oxide/hydroxide derivatives.

As a leaf node, this HTS code does not have further subcategories. Therefore, the classification relies on the precise identification of the substance as chromium trioxide. Importers and exporters should ensure that the material being declared matches the chemical properties and formula of chromium trioxide to correctly apply this classification. Any mixtures or compounds containing chromium trioxide alongside other substances would need to be evaluated for their primary constituent and potential classification under different HTS codes.