2903.89 - Other:

This HTS category, 2903.89, encompasses halogenated derivatives of cyclanic, cyclenic, or cycloterpenic hydrocarbons that are not specifically listed under preceding subheadings within 2903.8. These compounds feature a cyclic hydrocarbon structure where hydrogen atoms have been substituted by halogen atoms (such as chlorine, bromine, or iodine). The "Other" designation signifies that it serves as a residual category for these types of halogenated cyclic hydrocarbons that do not fall into the more precisely defined sibling categories.

Unlike its siblings, 2903.81.00.00 (which covers 1,2,3,4,5,6-Hexachlorocyclohexane, including lindane), 2903.82.00.00 (Aldrin, chlordane, and heptachlor), and 2903.83.00.00 (Mirex), this category is not limited to these specific named organochlorine pesticides. Instead, it captures a broader range of halogenated cyclic compounds. The distinction lies in the specific chemical structure and the absence of their inclusion in the more granular, named categories.

Within this category, further subdivisions are made to distinguish between compounds derived from aromatic hydrocarbons and other cyclic structures. The subcategory for derivatives from benzene or other aromatic hydrocarbons would include halogenated compounds where the cyclic structure is based on an aromatic ring system. The subsequent "Other" subcategory would then encompass halogenated cyclanic, cyclenic, or cycloterpenic hydrocarbons that are not derived from aromatic precursors, thereby providing a comprehensive classification for all remaining halogenated cyclic hydrocarbons.