9902.11.20 - Dimethyl carbonate polymer with 1,6-hexanediol copolymer and 2-oxepanone (CAS No. 282534-15-0) (provided for in subheading 3907.99.50)

This HTS classification covers a specific type of polymer, identified by its chemical composition: a copolymer formed from dimethyl carbonate and 1,6-hexanediol, further reacted with 2-oxepanone (CAS No. 282534-15-0). This particular material is designated under Chapter 99, which signifies temporary legislation, modifications pursuant to trade agreements, or additional import restrictions proclaimed under specific agricultural acts. Its inclusion in Chapter 99 means it is subject to special, often time-limited, import rules beyond the standard tariff classifications.

Unlike the vast majority of HTS categories that classify goods based on their inherent nature (e.g., live animals, manufactured articles, raw materials), this entry, and others within Chapter 99, are distinct because they represent specific regulatory treatments applied to certain goods. The primary distinction lies in the regulatory overlay; while the chemical substance itself might otherwise fall under a more permanent chapter (in this case, noted as provided for in subheading 3907.99.50), its presence here indicates a unique import status dictated by temporary trade policies or restrictions.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, the classification is definitive for the described polymer under the current temporary provisions. Importers should pay close attention to the specific directives and expiration dates associated with Chapter 99 entries to ensure compliance, as the provisions are subject to change and may require specific documentation or adherence to quotas or duties not found in the permanent tariff schedule.