9902.04.32 - N,N'-Hexamethylenebis(3,5-di-tert-butyl-4-hydroxyhydrocin- namamide) (3,3'-bis(3,5-di-tert-butyl-4-hydroxyphenyl)-N,N'-hexa- methylenedipropionamide) (CAS No. 23128-74-7) (provided for in subheading 2924.29.31)

This classification, HTS Code 9902.04.32, pertains to a specific chemical compound: N,N'-Hexamethylenebis(3,5-di-tert-butyl-4-hydroxyhydrocinnamide), also identified by its CAS No. 23128-74-7. This substance is a complex amide derivative of hydrocinnamic acid, characterized by the presence of tert-butyl groups and phenolic hydroxyl groups on the phenyl rings. The official description further clarifies its chemical structure as 3,3'-bis(3,5-di-tert-butyl-4-hydroxyphenyl)-N,N'-hexamethylenedipropionamide. For customs purposes, this classification is utilized for this particular chemical when it is imported under specific trade agreement provisions or temporary modifications.

Given that this is a leaf node within Chapter 99, it does not possess subcategories for further subdivision. Instead, its significance lies in its designation as a temporary or special provision within the Harmonized Tariff Schedule. Its distinction from sibling categories at the same level, such as the general HTS codes for various live animals or other merchandise, is evident by its placement within Chapter 99, which is reserved for temporary legislation and special import restrictions. Unlike the broad classifications of goods in other chapters, this code addresses a very specific chemical compound under particular, often time-limited, import regulations.

The primary function and classification criterion for this HTS code are the precise chemical identity of the substance itself. It is important to note that this item is "provided for in subheading 2924.29.31," indicating its primary classification under the permanent chemical sections of the HTS. However, the use of HTS code 9902.04.32 signifies a special or temporary import status, likely related to trade agreements, quotas, or specific import relief measures. Therefore, classification hinges on both the chemical identity and the prevailing temporary import regulations indicated by the Chapter 99 designation.