2903.89.70 - Other

This HTS category, 2903.89.70, encompasses "Other" halogenated derivatives of cyclanic, cyclenic, or cycloterpenic hydrocarbons that do not fall under more specific subheadings. It serves as a residual category for brominated cyclohydrocarbons when they are not specifically named or defined elsewhere within the 2903.89 grouping.

Distinguishing this category from its siblings, 2903.89.40.00 (1,3,5,7,9,11-Hexabromocyclododecane) and 2903.89.60.00 (Tetrabromocyclooctane), is crucial. While those siblings cover precisely defined compounds, 2903.89.70.00 is for brominated cyclohydrocarbons that do not match the exact chemical structures of the named siblings, even if they share similar chemical functionalities or origins. This includes isomers, mixtures, or less common brominated cyclohydrocarbons.

The subcategories under 2903.89.70.00 further refine the classification. 2903.89.70.10 specifically addresses "Other hexabromocyclododecanes (HBCDs)," accounting for variations or mixtures of HBCDs not precisely aligned with the general hexabromocyclododecane mentioned in the sibling category. The residual 2903.89.70.90 category captures any remaining brominated cyclohydrocarbons that do not fit the more specific subdivisions.