9902.03.52 - 2,4,4-Trimethyl-1,6-hexanediamine (CAS No. 25620-58-0) (provided for in subheading 2921.29.00)

This HTS category, 9902.03.52, specifically addresses 2,4,4-Trimethyl-1,6-hexanediamine (CAS No. 25620-58-0). It is important to note that this provision is made "for" subheading 2921.29.00, indicating that while it falls under Chapter 99's temporary or special provisions, its primary classification resides within Chapter 29, which covers organic chemicals. This particular diamine is a specific organic chemical compound, typically used as an intermediate in the production of polymers and other chemical products.

The inclusion of this code within Chapter 99 signifies a temporary measure or special classification, distinct from the permanent listings in the earlier chapters of the Harmonized Tariff Schedule. While siblings within Chapter 99 might represent other temporary trade measures, tariff rate quotas, or special provisions for specific goods, this entry is precisely defined by its chemical identity. Unlike broader categories at the root level which may encompass entire classes of goods like live animals (as seen in the sibling examples), 9902.03.52 is narrowly focused on a single, identifiable chemical compound.

As a leaf node, this category does not possess subcategories. Therefore, the focus for classification purposes rests entirely on the accurate identification of the imported chemical as 2,4,4-Trimethyl-1,6-hexanediamine, with its associated CAS number serving as a key identifier. Any entry falling under this provision must be this specific chemical, and its classification under Chapter 99 implies it is subject to the temporary or special rules outlined for this particular HTS code.