2916.20 - Cyclanic, cyclenic or cycloterpenic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives:

This HTS category, 2916.20, encompasses a specific group of monocarboxylic acids characterized by a cyclic structure, including those with saturated carbocyclic rings (cyclanic), unsaturated carbocyclic rings (cyclenic), and those derived from terpene hydrocarbons (cycloterpenic). It also includes their various derivatives such as anhydrides, halides, peroxides, peroxyacids, and further functionalized compounds through halogenation, sulfonation, nitration, or nitrosation. The defining feature is the presence of a single carboxyl group (-COOH) attached to a cyclic carbon skeleton.

This category is distinguished from its sibling categories by its focus on cyclic structures. Sibling categories cover unsaturated acyclic monocarboxylic acids, which have a carbon chain with double or triple bonds but are not ring-based, and aromatic monocarboxylic acids, where the cyclic structure possesses aromatic properties (e.g., benzene rings). Therefore, goods classified under 2916.20 will always feature a non-aromatic cyclic core, such as cyclohexane carboxylic acid or camphor derivatives.

Within this category, further subdivisions exist to provide more granular classification. The subcategory 2916.20.10.00 specifically identifies Tefluthrin, a complex cyclopropanecarboxylate derivative, indicating a provision for highly specific and often patented chemical compounds. The residual category, 2916.20.50.00, serves as a catch-all for all other cyclanic, cyclenic, or cycloterpenic monocarboxylic acids and their derivatives that do not fall under the more specific provisions.