9902.04.51 - 2,5-Bis(acetoacetylamino)benzenesulfonic acid (CAS No. 70185-87-4) (provided for in subheading 2924.29.71)

This HTS category, 9902.04.51, pertains to the specific chemical compound 2,5-Bis(acetoacetylamino)benzenesulfonic acid, identified by CAS Number 70185-87-4. This classification is placed under Section XXII of the Harmonized Tariff Schedule, which deals with Special Classification Provisions, temporary legislation, and temporary modifications proclaimed pursuant to trade agreements legislation. Importantly, the note "provided for in subheading 2924.29.71" indicates that while this compound is subject to temporary provisions, its primary classification falls within Chapter 29, specifically relating to organic compounds.

Within the broader Chapter 99, which encompasses temporary measures and special import restrictions, this particular code designates a specific chemical for targeted tariff or trade treatment. Unlike the vast majority of sibling categories within Chapter 99 which may cover a range of temporary tariff measures or specific restricted goods, 9902.04.51 is highly specific, applying only to this single named chemical substance.

As a leaf node, this category does not have further subcategories. Its purpose is to provide a distinct classification for 2,5-Bis(acetoacetylamino)benzenesulfonic acid that is separate from its standard classification in Chapter 29, likely due to specific trade policy, temporary duty rates, or import restrictions enacted under the authority of Section 22 of the Agricultural Adjustment Act or other trade agreements. Importers and exporters must consult relevant trade notices and proclamations for the precise conditions and duties associated with this temporary classification.