9902.11.08 - Poly(ethyl acrylate-co-methyl methacrylate-co-trimethylammonioethyl methacrylate chloride) (CAS No. 33434-24-1) (provided for in subheading 3906.90.50)

This HTS category, 9902.11.08, covers specific copolymer resins, namely Poly(ethyl acrylate-co-methyl methacrylate-co-trimethylammonioethyl methacrylate chloride) (CAS No. 33434-24-1). These are identified as being provided for under subheading 3906.90.50 of the Harmonized Tariff Schedule. This temporary or special classification likely applies due to specific trade agreement provisions or temporary import restrictions that supersede the general classification under Chapter 39. The material is a synthetic polymer characterized by its unique chemical structure and the presence of quaternary ammonium groups, which impart specific functional properties.

Given that this is a leaf node, there are no further subcategories within 9902.11.08. Its distinctiveness lies in its highly specific chemical composition and its placement within Chapter 99, indicating special trade conditions. Unlike the broad range of goods found under the primary HTS chapters, such as live animals (Chapter 01), this category is reserved for precisely defined chemical substances subject to particular regulatory treatment. The parent context of Section XXII signifies its role within special classification provisions and temporary legislation, setting it apart from standard tariff classifications that focus on the inherent nature and use of goods.