9902.10.97 - 1-Propamine, 3-(triethoxysilyl)-, reaction products with Etesters of reduced polymd. oxidized poly(tetrafluoroethylene) (CAS No. 223557-70-8) (provided for in subheading 3904.69.50)

This HTS classification, 9902.10.97, pertains to specific chemical reaction products. It covers "1-Propamine, 3-(triethoxysilyl)-, reaction products with E-esters of reduced polymd. oxidized poly(tetrafluoroethylene) (CAS No. 223557-70-8)". These are specialized chemical compounds derived from the interaction of silane-functionalized propylamine with modified polytetrafluoroethylene (PTFE) esters. The CAS number provides a unique identifier for this precise chemical entity.

The primary distinction for this category lies in its precise chemical composition and its placement within Chapter 99, which is reserved for temporary legislation and special provisions. Unlike the vast array of sibling categories starting with Chapters 01 and higher, which classify goods by their primary physical form and material (e.g., live animals, plants, mineral products, or manufactured goods), this entry is designated for specific, potentially tariff-modified or restricted, chemical substances subject to temporary trade measures.

As this is a leaf node, there are no subcategories to introduce. The classification is final at this level, indicating that further subdivision is not applicable under the current HTS structure. Classification under this specific code is contingent on the chemical identity precisely matching the description and its inclusion under the prevailing temporary legislation or special provisions associated with Chapter 99. Importers must verify that the goods meet all criteria for entry under this temporary classification.