2908.99 - Other:

This HTS category, 2908.99, encompasses a broad range of halogenated, sulfonated, nitrated, or nitrosated derivatives of phenols and phenol-alcohols that do not fall into more specific subcategories within heading 2908. It includes compounds where the phenol or phenol-alcohol structure has been modified by the addition of halogen atoms (such as chlorine, bromine, or iodine), sulfo groups (-SO3H), nitro groups (-NO2), or nitroso groups (-NO), and these derivatives are not otherwise specified. This broad classification is a residual category for such chemical compounds when they are not explicitly detailed in other provisions.

To differentiate this category from its siblings, 2908.91 and 2908.92, it is important to note that those specific codes are reserved for Dinoseb (ISO) and its salts, and 4,6-Dinitro-o-cresol (DNOC) (ISO) and its salts, respectively. HTS 2908.99, therefore, covers all other phenol and phenol-alcohol derivatives that meet the general criteria of halogenation, sulfonation, nitration, or nitrosation but are not these specific named compounds. The distinction relies on precise chemical identification and whether the substance is one of the individually listed derivatives or a different compound within the broader group.

Within this category, further sub-classification exists to organize these diverse compounds. The subcategories aim to group derivatives based on the specific functional groups present beyond the basic phenol/phenol-alcohol structure and any qualifying halogens. This allows for a more granular approach to classification, distinguishing between derivatives that primarily contain sulfo groups, their salts and esters, and those that fall into an "other" residual classification, indicating a need to precisely identify the chemical structure to assign the correct tariff.