9902.09.75 - Mixtures of at least 95 percent by weight allyl isothiocyanate (3-isothiocyanato-1-propene) (CAS No. 57-06-7), and application adjuvants (provided for in subheading 3808.92.28)

This HTS code, 9902.09.75, specifically classifies mixtures primarily composed of allyl isothiocyanate (also known as 3-isothiocyanato-1-propene, CAS No. 57-06-7). The defining characteristic for this classification is that the mixture must contain at least 95 percent by weight of allyl isothiocyanate. It also includes application adjuvants that are themselves classified under subheading 3808.92.28, indicating a dual composition focused on pest control or similar applications. This provision falls under Section XXII, which deals with special classification provisions, temporary legislation, and temporary modifications proclaimed pursuant to trade agreements and section 22 of the Agricultural Adjustment Act.

Distinguishing this category from its siblings, which largely consist of live animals under Chapter 01, is crucial. While this is a leaf node with no further subcategories, its placement within Chapter 99 signifies its nature as a temporary or special classification, often related to trade policy or specific agricultural import restrictions. Unlike general chemical classifications found elsewhere in the HTS, this code addresses a very specific chemical compound and its formulated mixtures within a specialized tariff chapter designed for unique trade circumstances. The key differentiator is the presence of allyl isothiocyanate at a high concentration and its intended use, often as an intermediate or an active component in pest or weed control products, as suggested by its linkage to subheading 3808.92.28.