9902.10.79 - Poly(1,1,2,2-tetrafluoro-2-[(trifluoroethenyl)oxy]ethanesulfonyl fluoride-co-tetrafluoroethylene) (CAS No. 1163733-25-2) (provided for in subheading 3904.69.50)

This HTS category, 9902.10.79, specifically classifies a fluoropolymer known as Poly(1,1,2,2-tetrafluoro-2-[(trifluoroethenyl)oxy]ethanesulfonyl fluoride-co-tetrafluoroethylene). Its Chemical Abstracts Service (CAS) number is 1163733-25-2, and it is designated for customs purposes under subheading 3904.69.50. This classification falls within Chapter 99, which encompasses temporary legislation, modifications to trade agreements, and import restrictions enacted under specific U.S. agricultural legislation.

As a leaf node within Chapter 99, this category does not have further subdivisions. Its specificity is crucial because Chapter 99 provisions are dynamic and often supersede classifications in other chapters. This entry is distinct from the broader classifications found in Chapters 1 through 98, which cover general merchandise. The inclusion in Chapter 99 signifies a temporary or conditional duty rate or import restriction, contingent upon specific legislative or trade policy actions. Professionals should consult the most current regulations and proclamations associated with Chapter 99 to ensure accurate duty assessment and compliance.