2920.19.50.00 - Other

This HTS category, 2920.19.50.00, encompasses "Other" thiophosphoric esters (phosphorodithioates) and their salts, along with their halogenated, sulfonated, nitrated, or nitrosated derivatives. This classification acts as a residual category for these specific inorganic chemical compounds when they do not fall under any more specific subheadings within the broader grouping of thiophosphoric esters. The focus here is on compounds derived from thiophosphoric acid where the sulfur atoms replace oxygen in both the P=O and P-O bonds, or where sulfur is present in other positions, and the phosphorus is bonded to organic radicals.

The sibling category at this level, "Aromatic," specifically covers thiophosphoric esters and their derivatives where the organic radicals attached to the phosphorus are aromatic in nature. Consequently, the "Other" category at 2920.19.50.00 is intended for thiophosphoric esters and their derivatives where the attached organic radicals are *non-aromatic*, or where the structure does not exclusively feature aromatic substituents. This distinction is crucial for accurate classification, relying on the chemical structure of the organic components.

As this node is a leaf node, there are no further subcategories. Therefore, the classification process for goods falling under 2920.19.50.00 relies on thoroughly analyzing the chemical composition of the imported or exported substance to confirm it is a thiophosphoric ester or its salt, and that it has undergone halogenation, sulfonation, nitration, or nitrosation, while also ensuring it is not exclusively aromatic in its organic substituents. Examples might include certain agricultural chemicals, lubricant additives, or synthetic intermediates where the organic portion is aliphatic or cycloaliphatic.