9902.11.43 - 1,4:5,8-Dimethanonaphthalene, 2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro-, polymer with 3a,4,7,7a-tetrahydro-4,7-methano-1H-indene, hydrogenated (CAS No. 881025-72-5), presented in pellet form (provided for in subheading 3911.90.25)

This HTS classification, 9902.11.43, specifically designates a hydrogenated polymer presented in pellet form. The polymer is derived from the reaction of 1,4:5,8-Dimethanonaphthalene, 2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro- with 3a,4,7,7a-tetrahydro-4,7-methano-1H-indene. This unique chemical composition and physical form are key identifiers for this particular classification.

This classification stands apart from the preceding HTS codes (0101 through 0105) which deal exclusively with live animals. Its placement within Chapter 99 indicates its status under temporary legislation or special provisions, differentiating it from permanent classifications found in earlier chapters of the HTS. The explicit mention of its provision "for in subheading 3911.90.25" further refines its context, suggesting it relates to polymers of cyclic hydrocarbons, not otherwise specified.

As this is a leaf node, there are no further subcategories to explore. The classification is highly specific, focusing on a particular chemical compound in a particular physical state. Importers encountering this HTS code should confirm that the imported material precisely matches the chemical description and physical form (pellets) as outlined, ensuring accurate declaration and compliance with any associated temporary legislation or import restrictions.