2921.22.10.00 - Derived in whole or in part from adipic acid

This HTS code, 2921.22.10.00, specifically classifies hexamethylenediamine that is derived, either entirely or partially, from adipic acid. Hexamethylenediamine is a diamine compound with six carbon atoms between the two amine groups, commonly used as a monomer in the production of nylon and other polymers. The key classification criterion here is the origin of the hexamethylenediamine, specifically its production pathway involving adipic acid, which distinguishes it from other forms or derivatives.

This category is distinguished from its sibling, 2921.22.50.00, which covers "Other" hexamethylenediamine and its salts. While both fall under the broader heading of hexamethylenediamine and its salts, the "Other" category would encompass hexamethylenediamine not specifically derived from adipic acid, or other related salts not meeting the specific criteria of this sub-subheading. Therefore, the distinction lies solely in the manufacturing origin of the chemical.

As this is a leaf node in the HTS classification system, there are no further subcategories. Classification under 2921.22.10.00 is final, and goods falling under this designation will not be further broken down into more specific HTS codes. Importers and exporters should ensure that documentation clearly indicates the derivation of their hexamethylenediamine from adipic acid to accurately apply this classification.