2933.99.16.00 - o-Diquat dibromide (1,1'-Ethylene- 2,2'-dipyridylium dibromide)

This HTS category, 2933.99.16.00, specifically covers the chemical compound o-Diquat dibromide, also known by its chemical name 1,1'-Ethylene-2,2'-dipyridylium dibromide. As a heterocyclic compound containing only nitrogen heteroatoms, it falls within a broad section dedicated to organic chemicals. The specific structure and function of o-Diquat dibromide, as a quaternary ammonium compound with two pyridinium rings, are key to its classification under this code.

Within the "Other" subcategories of heterocyclic compounds, this node differentiates itself from its sibling category, 2933.99.14.00, which covers 5-Amino-4-chloro-α-phenyl-3-pyridazinone. While both are organic chemicals with nitrogen heteroatoms, o-Diquat dibromide is chemically distinct and primarily functions as a herbicide, whereas the sibling compound has a different chemical structure and potentially varied applications. The classification here is driven by the precise chemical identity and recognized uses of the substance.

Since 2933.99.16.00 is a leaf node, there are no further subdivisions. This means that any importation of o-Diquat dibromide, regardless of its purity or specific formulation, would be classified directly under this code. The classification relies on the definitive identification of the chemical substance itself, distinguishing it from other pyridine derivatives or heterocyclic compounds that might have different uses or structural characteristics, and therefore fall under alternative HTS codes.