2933.99.82 - Other

This HTS category, 2933.99.82, encompasses "Other" heterocyclic compounds containing nitrogen hetero-atoms, which are not specifically enumerated in preceding subheadings and are aromatic or modified aromatic in nature. These compounds are characterized by their ring structures that include nitrogen atoms, contributing to their chemical properties and applications. They represent a broad residual category for nitrogen-containing heterocyclic compounds that do not fit into more narrowly defined classifications within the 2933.99 subtree.

It is important to distinguish this category from its sibling, 2933.99.79.00, which is reserved for products specifically described in additional U.S. note 3 to section VI. Therefore, classification under 2933.99.82.xx is appropriate when the heterocyclic compound does not meet the criteria outlined in that specific additional U.S. note, while still fulfilling the general requirements of aromatic or modified aromatic nitrogen-containing heterocycles.

The subcategories within 2933.99.82.xx provide further specificity for commonly encountered compounds. Heading 2933.99.82.10 designates Benzotriazole, a well-known corrosion inhibitor and chemical intermediate. Similarly, 2933.99.82.20 covers Tolyltriazole, another important corrosion inhibitor. The residual subheading, 2933.99.82.90, is designated for all other aromatic or modified aromatic heterocyclic compounds with nitrogen hetero-atoms only, not otherwise specified.