9902.09.79 - Formulations of zinc 1-{(2R, 3R, 4S, 5R)-5-[(S)-{[(2S, 3S, 4S)-2-amino-5-(carbamoyloxy) -3,4-dihydroxypentanoyl] amino}(carboxylato)methyl] -3,4-dihydroxytetrahydro-2-furanyl}-2,4-dioxo-1,2,3,4-tetrahydro -5-pyrimidinecarboxylate (Polyoxin D Zinc Salt) (CAS No. 146659-78-1) (provided for in subheading 3808.92.50)

This HTS classification, specifically 9902.09.79, covers a highly specific chemical formulation: Polyoxin D Zinc Salt (CAS No. 146659-78-1). This compound is an agricultural fungicide, identified in the general description as a formulation of zinc 1-{(2R, 3R, 4S, 5R)-5-[(S)-{[(2S, 3S, 4S)-2-amino-5-(carbamoyloxy) -3,4-dihydroxypentanoyl] amino}(carboxylato)methyl] -3,4-dihydroxytetrahydro-2-furanyl}-2,4-dioxo-1,2,3,4-tetrahydro -5-pyrimidinecarboxylate. Its inclusion under Chapter 99 signifies its status under temporary legislation, trade agreements, or specific import restrictions, noting its primary classification under subheading 3808.92.50.

As a leaf node within Chapter 99, this entry does not have further subdivisions. Its uniqueness lies in its specific chemical structure and designated use as a fungicidal formulation. Unlike the broader categories found at the root level of the HTS, such as live animals or general chemicals, this classification targets a precisely defined organic compound with agricultural applications, subject to special tariff treatment due to its regulatory or trade policy implications. The distinction from other potential classifications hinges on the exact chemical identity and its specific inclusion within the temporary provisions of Chapter 99.