9902.11.15 - Heat-curable epoxy resin mixture containing more than 30 percent by weight of 4,4'-(9H-fluorene-9,9-diyl)bis(2-chloroaniline) (CAS No. 107934-68-9) as a curing agent (provided for in subheading 3907.30.00)

This HTS category, 9902.11.15, specifically covers a heat-curable epoxy resin mixture characterized by a significant content (over 30% by weight) of 4,4'-(9H-fluorene-9,9-diyl)bis(2-chloroaniline) (CAS No. 107934-68-9). This particular chemical acts as a curing agent within the epoxy resin formulation. The classification is situated within Chapter 99 of the Harmonized Tariff Schedule, which deals with temporary legislation, modifications pursuant to trade agreements, and additional import restrictions.

Distinguishing this specific classification from its numerous siblings within the broader HTS system is crucial. Unlike the numerous headings starting with "0101" for live animals or other material-based headings for common goods, 9902.11.15 is a highly specialized provision within the "Special Classification Provisions" chapter. Its existence is tied to specific trade or legislative actions, rather than a general description of goods. The parenthetical reference "(provided for in subheading 3907.30.00)" indicates that while this is a temporary or special provision, the underlying material would generally fall under the standard classification for epoxy resins in Chapter 39.

As this is a leaf node within the HTS database, there are no subcategories to introduce. The classification is definitive for the described mixture and its specific curing agent. Classification under this heading relies on a precise chemical composition exceeding 30% by weight of the specified chloroaniline compound and its intended use as a heat-curable epoxy resin mixture. This level of specificity ensures that only the precisely defined product is captured under this particular temporary tariff provision.