9902.06.21 - N-Butyl-2,2,6,6-tetramethylpiperidin-4-amine (CAS No. 36177-92-1) (provided for in subheading 2933.39.91)

This HTS classification, 9902.06.21, pertains to N-Butyl-2,2,6,6-tetramethylpiperidin-4-amine (CAS No. 36177-92-1). This chemical compound is specifically designated for temporary tariff treatment, as indicated by its placement within Chapter 99 of the Harmonized Tariff Schedule. Such provisions are typically enacted under special circumstances, such as trade agreements or agricultural adjustment legislation, and are subject to periodic review and modification. While the chemical itself falls under the permanent classification of subheading 2933.39.91, this 9902 code signifies a distinct, temporary import status.

As a leaf node within Chapter 99, this classification does not have further subcategories. Its uniqueness lies in its specific designation for this chemical under a temporary provision. Unlike other entries within Chapter 99 that might cover broader categories of goods or temporary modifications to existing tariff rates, 9902.06.21 is narrowly focused on this particular amine. It stands apart from the more general provisions of Chapter 99 and the permanent classifications found in earlier chapters, such as live animals or other basic commodities, due to its specialized nature and the temporary legislative context it operates within.