9902.10.93 - Polyperfluoroethoxymethoxydifluoroethyl polyethylene glycol ether (CAS No. 88645-29-8) (provided for in subheading 3904.69.50)

This HTS classification, 9902.10.93, specifically covers a specialized fluoropolymer identified as Polyperfluoroethoxymethoxydifluoroethyl polyethylene glycol ether (CAS No. 88645-29-8). This designation places it under Chapter 99, which is reserved for temporary legislation, temporary modifications, and additional import restrictions. Notably, this specific provision indicates that while classified here for temporary purposes, its primary classification under the permanent tariff schedule is found in subheading 3904.69.50, pertaining to other fluoropolymers.

Within the broader context of Chapter 99, this code is distinct from other entries that might relate to temporary measures affecting other goods or chapters of the HTS. Its existence signifies a particular trade policy or restriction applicable to this specific chemical compound, rather than a general category of goods. Therefore, it does not have direct siblings in the sense of comparable goods under Chapter 99; its "siblings" would be other temporary provisions that are equally unique in their purpose.

As this is a leaf node within the HTS database, there are no further subcategories or subdivisions for this specific code. Classification at this level is definitive for this particular compound under the stated temporary legislation. Importers should be aware that while 9902.10.93 indicates a temporary tariff treatment or restriction, they must also consult the permanent classification in subheading 3904.69.50 for the underlying material's typical tariff treatment. This dual classification highlights the importance of monitoring temporary trade measures in addition to the standard HTS structure.