9902.10.71 - C12-C18 alkenes, polymers with 4-methyl-1-pentene (CAS Nos. 25155-83-3, 81229-87-0 and 103908-22-1) (provided for in subheading 3902.90.00)

This HTS category, 9902.10.71, specifically addresses certain alkene polymers. It covers products derived from C12-C18 alkenes that have been polymerized with 4-methyl-1-pentene. The presence of the specified CAS numbers (25155-83-3, 81229-87-0, and 103908-22-1) serves as a definitive identifier for these particular polymer compositions, ensuring precise classification. These materials are generally used in industrial applications, often as components in plastics or other chemical formulations.

As this is a leaf node within Chapter 99, which pertains to temporary legislation and special provisions, it does not have further subcategories. Its purpose is to provide a specific, temporary tariff treatment or restriction for these particular chemical compounds, overriding or modifying the general classification that would otherwise apply under Chapter 39 (Plastics and articles thereof). The parenthetical reference to subheading 3902.90.00 indicates that these goods would typically fall under general provisions for other polymers of alpha-olefins, but are now subject to the specific conditions outlined in this Chapter 99 provision. This distinction is crucial for importers to correctly declare their goods and adhere to any associated duties or limitations.