9902.11.55 - 1,6-Hexanediamine, N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-polymer with 2,4,6-trichloro-1,3,5-triazine, reaction products with N-butyl-1-butanamine and N-buty-2,2,6,6-tetramethyl-4-piperidinamine (CAS No. 192268-64-7)(provided for in subheading 3911.90.90)

This HTS classification, specifically 9902.11.55, covers a highly specialized chemical product: 1,6-Hexanediamine, N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-polymer with 2,4,6-trichloro-1,3,5-triazine, reaction products with N-butyl-1-butanamine and N-buty-2,2,6,6-tetramethyl-4-piperidinamine, identified by CAS No. 192268-64-7. Its inclusion within Chapter 99 signifies its classification under temporary legislation or special provisions, as indicated by its parenthetical reference to subheading 3911.90.90, which typically covers other non-cellular and non-animal plastic materials in primary forms.

Unlike the broader categories at the HTS database root, which encompass a vast array of goods from live animals to manufactured products, this node is exceptionally specific. It does not concern general chemical compounds, polymers, or plastics. Its placement within Chapter 99 highlights its unique status, often related to specific trade agreements, temporary import restrictions, or other regulatory measures that deviate from standard tariff classifications. This code is designed to track particular chemical formulations that may require special monitoring or fall under unique import protocols.

As a leaf node, HTS code 9902.11.55 has no further subcategories. This indicates that any product meeting the precise chemical description and CAS number is classified directly under this heading. The "provided for in subheading 3911.90.90" notation serves as a crucial cross-reference, suggesting that while this item has a temporary or special classification here, its underlying material composition would otherwise fall under broader polymer categories in the main tariff schedule.