2841 - Salts of oxometallic or peroxometallic acids:

This HTS category, 2841, encompasses a specific group of inorganic chemical compounds classified as salts of oxometallic or peroxometallic acids. These substances are characterized by the presence of a metal atom in a high oxidation state, forming an oxoanion (containing oxygen) or a peroxyanion (containing the O2²⁻ group). Examples within this classification include chromates, dichromates, manganates, permanganates, molybdates, and tungstates. It is important to note that these are salts formed by the reaction of the respective metal oxide acids or peroxides with bases.

Within the broader Chapter 28, which covers inorganic chemicals, Category 2841 is distinct from other entries. For instance, it is differentiated from simple metal oxides or hydroxides (which would fall under different HTS codes) by the presence of the oxo- or peroxometallic acid derivative. It also differs from salts of other inorganic acids (like chlorides, sulfates, or nitrates) by its specific chemical structure involving metal-oxygen bonds in higher oxidation states or peroxide linkages.

The subcategories within 2841 further refine classification based on the specific metal and its associated oxo- or peroxometallic anion. For example, specific entries exist for sodium dichromate, other chromates and dichromates, and manganites, manganates, and permanganates. This granular breakdown allows for precise identification of the chemical composition, crucial for determining applicable duties, trade regulations, and statistical reporting requirements. The distinction between these subcategories hinges on the specific metal (e.g., chromium, manganese, molybdenum, tungsten) and the resultant oxometallic or peroxometallic acid salt formed.