9902.11.65 - Ion-exchange resin consisting of poly(acrylic acid-co-2,2'-oxydiethanol-co-ethenoxyethene), acid form (CAS No. 359785-58-3) (provided for in subheading 3914.00.60)

This HTS category, 9902.11.65, specifically classifies an ion-exchange resin identified by its chemical composition: poly(acrylic acid-co-2,2'-oxydiethanol-co-ethenoxyethene) in its acid form, with CAS Number 359785-58-3. This classification falls under Chapter 99, which pertains to temporary legislation and modifications related to trade agreements and agricultural adjustments. The resin's primary function as an ion-exchange material is key to its identification and use.

While sibling categories at the HTS Database Root level encompass a vast array of goods, from live animals (Chapters 01) to various manufactured products, this specific entry is distinguished by its specialized nature as a chemical resin. Unlike broader categories that might include raw materials or finished goods from different sectors, 9902.11.65 targets a precise chemical compound with a defined industrial application, further contextualized by its temporary tariff or regulatory treatment. Its inclusion within Section XXII highlights its status as a subject of specific trade policy measures.

As a leaf node, HTS Code 9902.11.65 does not have further subcategories. Therefore, the classification ends at this detailed description of the ion-exchange resin. For practical classification purposes, importers and exporters must ensure that the imported or exported material precisely matches the chemical description and CAS number provided, as the specific designation within Chapter 99 signifies a particular set of customs requirements or allowances that may differ from its standard classification under Chapter 39 (Plastics and articles thereof), where it is noted as being "provided for in subheading 3914.00.60."