9902.11.78 - Potassium methacrylate-divinylbenzene copolymer (Polacrilin potassium) (CAS No. 65405-55-2) (provided for in subheading 3914.00.60)

This HTS classification, 9902.11.78, pertains to specific temporary import provisions related to Potassium methacrylate-divinylbenzene copolymer, also known as Polacrilin potassium. This material, identified by CAS Number 65405-55-2, falls under special classification rules. It's important to note that the "99" chapter in the Harmonized Tariff Schedule generally designates temporary legislation, modifications related to trade agreements, or additional import restrictions. The reference to subheading 3914.00.60 indicates its underlying classification as a synthetic polymer within Chapter 39, but this specific 9902 code indicates a distinct temporary treatment or restriction.

While the broader HTS database contains numerous sibling categories covering a vast array of goods (e.g., live animals in Chapter 01), HTS 9902.11.78 operates within a distinct area of temporary and special provisions. Its purpose is not to describe general merchandise but to apply specific regulatory overlays to a particular chemical compound. Therefore, comparisons to sibling categories at the same level are not directly relevant in terms of product type, as this node addresses a unique regulatory context rather than a general commodity.

As this HTS code is a leaf node, there are no further subcategories or subdivisions. The classification is specific to Polacrilin potassium under the temporary legislation provisions of Chapter 99. Understanding this classification requires consulting the relevant trade agreements, temporary legislation, and Section 22 of the Agricultural Adjustment Act, as these are the legal frameworks that govern the application of this specific HTS code. Importers must be aware of any specific requirements, duties, or restrictions associated with this temporary classification.