9902.11.02 - Polyvinyl formal resin (ethenol; [(ethenyloxy)methoxy]ethene (CAS Nos. 63450-15-7, 63148-64-1, and 9003-33-2) (provided for in subheading 3905.91.10)

This HTS category, 9902.11.02, specifically addresses polyvinyl formal resin. This designation encompasses a particular type of polymer identified by CAS numbers 63450-15-7, 63148-64-1, and 9003-33-2. It is important to note that this classification is found within Chapter 99, which pertains to temporary legislation and special provisions, indicating that its application may be subject to time-limited or specific trade agreement-related regulations. The description explicitly states that these resins are "provided for in subheading 3905.91.10," signifying a reference to a more permanent classification under Chapter 39, which covers plastics and articles thereof.

As a leaf node within Chapter 99, HTS 9902.11.02 does not have further subcategories. Its uniqueness lies in its specific detailing of polyvinyl formal resin, distinguishing it from the broader categories that precede it in the HTS. While siblings at the root level might cover live animals or other broad product groups, this node's focus is narrowly on a specific chemical compound within a chapter dedicated to temporary tariff measures. The intent of this classification is to apply specific tariff treatments or restrictions to this particular resin, likely in alignment with trade policies or temporary modifications.