2914.29 - Other:

This HTS category, 2914.29, encompasses ketones that possess a cyclanic, cyclenic, or cycloterpenic structure and do not feature any other oxygen-containing functional groups besides the ketone. These are organic compounds characterized by a carbonyl group (C=O) bonded to two carbon atoms within a cyclic structure, which can be saturated (cyclanic), unsaturated (cyclenic), or derived from terpenes. This heading serves as a residual category for such cyclic ketones that are not specifically enumerated in more precise subheadings.

Distinguishing this category from its siblings is crucial for accurate classification. Unlike 2914.22, which specifically addresses cyclohexanone and its methyl derivatives, or 2914.23.00.00, which is dedicated to ionones and methylionones, 2914.29.00.00 captures a broader range of cyclic ketones. The key differentiator lies in the specific structural features and common usage of the excluded sibling categories, leaving this subheading to cover less common or more generally defined cyclic ketone structures.

Within this category, further subdivision is provided for specific, commonly traded cyclic ketones. Subheading 2914.29.10.00 specifically classifies isophorone, a widely used solvent and intermediate. Another significant subdivision is for camphor (not explicitly numbered in the provided snippet but implied as a subcategory), a well-known bicyclic ketone. Finally, the residual subheading 2914.29.50.00 captures all other cyclic ketones that do not meet the criteria for the more specific subheadings, ensuring comprehensive coverage for this class of organic chemicals.