9902.10.77 - Poly(dibutyl (2Z)-2-butenedioate-co-vinyl chloride-co-2-hydroxypropyl acrylate) (CAS No. 114653-42-8) (provided for in subheading 3904.40.00)

This HTS code, 9902.10.77, designates a specific, temporary provision for a complex polymer material: Poly(dibutyl (2Z)-2-butenedioate-co-vinyl chloride-co-2-hydroxypropyl acrylate) identified by CAS Number 114653-42-8. This classification is established under Chapter 99 of the Harmonized Tariff Schedule, which pertains to temporary legislation, modifications to trade agreements, and import restrictions enacted under specific agricultural legislation. The provision for this material is explicitly linked to its primary classification under subheading 3904.40.00, indicating it is a copolymer of vinyl chloride and other monomers.

As a temporary provision within Chapter 99, this code's primary function is to either introduce specific tariff treatments, quotas, or other regulatory measures that deviate from the permanent classification under Chapter 39. Its existence signifies a unique trade policy consideration for this particular polymer at the time of its classification. It is crucial to understand that Chapter 99 codes are generally dynamic and subject to change based on legislative and trade policy updates, unlike the more stable classifications found in the main body of the HTS.

Since this node is a leaf node, there are no further subcategories to explore within this specific HTS code. Its classification is definitive, and importers must ensure that the material precisely matches the chemical description and CAS number provided to correctly utilize this temporary provision. Any deviation in the polymer's composition or identification would necessitate re-evaluation under the relevant permanent HTS chapters, likely Chapter 39 for plastics and articles thereof.