9902.11.07 - Poly(butyl methacrylate-co-(2-dimethylaminoethyl) methacrylate-co-methyl methacrylate) 1:2:1 (CAS No. 24938-16-7) (provided for in subheading 3906.90.50)

This HTS code, 9902.11.07, specifically classifies a copolymer designated as Poly(butyl methacrylate-co-(2-dimethylaminoethyl) methacrylate-co-methyl methacrylate) in a 1:2:1 ratio, identified by CAS No. 24938-16-7. This category falls under Temporary Legislation and Modifications, indicating it is subject to specific, potentially time-limited trade provisions or restrictions beyond the standard classification under Chapter 39. The "provided for in subheading 3906.90.50" notation directs users to the primary classification for synthetic primary plastics, polymers, and artificial resins, thereby linking this temporary provision to its underlying commodity classification.

As this is a leaf node, there are no direct subcategories to introduce. Instead, the focus is on the unique nature of this provision. Unlike the broad sibling categories that cover live animals, this HTS code pertains to a specific synthetic polymer. The classification within Chapter 99 signifies that the importation of this particular polymer is subject to special rules, potentially including quotas, specific duties, or other trade measures, that differ from its general classification under Chapter 39. Importers must consult the notes and any associated proclamations within Chapter 99 to fully understand the applicable trade requirements.