9902.11.28 - 1,2-Benzenedicarboxylic acid, 3,4,5,6-tetrabromo-, polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, hexanedioic acid, 2,2-((1-methylethylidene)bis(4,1-phenyleneoxymethylene)) bis(oxirane) and 1,2-propanediol in toluene (CAS No. 68568-64-9) (provided for in subheading 3907.99.50)

This HTS code, 9902.11.28, specifically classifies a complex brominated polymer resin. The composition includes 1,2-Benzenedicarboxylic acid, tetrabromo-, a polymer formed with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, hexanedioic acid, a bisphenol A-based epoxy resin (2,2-((1-methylethylidene)bis(4,1-phenyleneoxymethylene)) bis(oxirane)), and 1,2-propanediol, all dissolved in toluene. This particular designation under Chapter 99 indicates a temporary tariff modification or restriction.

As a leaf node within the HTS database, this category does not have further subdivisions. Its specificity lies in the precise chemical composition and its designation under temporary legislation. Goods classified here are distinct from other temporary tariff provisions (other 99xx codes) by their unique chemical makeup, which is designed for specific flame-retardant properties or other specialized applications, and its provision for tariff treatment under subheading 3907.99.50 of the permanent tariff schedule. The inclusion of CAS No. 68568-64-9 further aids in precise identification.