2852.10.90.00 - Other

This HTS classification, 2852.10.90.00, covers all inorganic or organic compounds of mercury that are chemically defined but are not explicitly listed under other subheadings within 2852.10. This includes a broad spectrum of mercury compounds possessing a defined chemical structure and purity, used across various industrial, laboratory, and specialized applications. The key criterion for inclusion here is that the compound must be chemically identifiable, meaning its molecular formula and composition are precisely known, and it is not a simple mixture of mercury with other elements.

This category serves as a residual classification for chemically defined mercury compounds, differentiating itself from the specific exclusions found in the sibling category, 2852.10.10.00. The sibling category specifically enumerates mercuric oxide, mercuric cyanide, mercuric oxycyanide, and mercuric potassium cyanide. Therefore, any chemically defined mercury compound that does not fall into the precise chemical definitions of those listed siblings would be classified under this "Other" subheading.

As this is a leaf node, there are no further subcategories to explore under 2852.10.90.00. Classification decisions for this code would rely on confirming that a mercury compound is chemically defined and does not precisely match the descriptions of the more specifically enumerated compounds at the 2852.10 level. Examples might include specific organomercury compounds with applications in research or specialized industrial catalysts, provided they are chemically defined and not otherwise specified.