9902.10.82 - Poly(1,1,2,2-tetrafluoro-2-[(trifluoroethenyl)oxy]ethanesulfonyl fluoride-co-tetrafluoroethylene) ammonium salt (CAS No. 1126091-34-6) (provided for in subheading 3904.69.50)

This HTS category, 9902.10.82, specifically covers a specialized fluoropolymer salt: Poly(1,1,2,2-tetrafluoro-2-[(trifluoroethenyl)oxy]ethanesulfonyl fluoride-co-tetrafluoroethylene) ammonium salt (CAS No. 1126091-34-6). This designation falls under Chapter 99, which pertains to temporary legislation, modifications to trade agreements, and additional import restrictions. Therefore, the classification of this particular polymer is subject to specific, potentially time-limited, regulatory provisions that supersede its classification under the standard HTS chapters.

The scope of this category is highly distinct from its sibling categories, which are generally organized by live animals or other broad commodity groups. Unlike the general merchandise found in the initial chapters of the HTS, this entry addresses a single, precisely defined chemical compound. Its presence within Chapter 99 signifies that its import is governed by unique rules or quotas, rather than by the general tariff treatment applied to common goods. The detailed chemical name and CAS number are crucial identifiers, ensuring that only this exact material is classified under this provision.

As a leaf node, this category does not have further subcategories. The specific nature of this provision within Chapter 99 indicates that it is a precise directive for a particular chemical substance, intended for a specific regulatory purpose. Any goods falling under this classification will be subject to the precise requirements of the temporary legislation or restrictions associated with HTS code 9902.10.82, which are detailed in the official U.S. Harmonized Tariff Schedule.