2816.40.20.00 - Of barium

This HTS classification, 2816.40.20.00, specifically covers **oxides, hydroxides, and peroxides of barium**. These compounds are inorganic chemical substances characterized by their barium content and the presence of oxygen in oxide form, hydroxyl groups in hydroxide form, or peroxide groups. Examples include barium oxide (BaO), barium hydroxide (Ba(OH)₂), and barium peroxide (BaO₂). These materials find applications in various industrial processes, such as in the production of ceramics, glass, and as reagents in chemical synthesis.

This category is distinguished from its sibling, 2816.40.10.00, by the specific metal element. While both are within the broader classification of "Oxides, hydroxides and peroxides, of strontium or barium," 2816.40.10.00 pertains to strontium compounds, whereas this classification exclusively addresses barium compounds. The distinction is crucial for accurate tariff application and duty assessment, relying on the elemental composition of the chemical substance.

As this classification represents a leaf node within the HTS, there are no further subcategories. Therefore, the primary focus for classification within 2816.40.20.00 is to confirm the presence of barium as the key metallic component within an oxide, hydroxide, or peroxide chemical structure. When determining classification, one should ensure the material is not a compound of barium with other elements that would lead it to be classified elsewhere in Chapter 28 or other chapters of the Harmonized Tariff Schedule.