2931.53.00.00 - O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate

This HTS classification covers specific organo-inorganic compounds, namely phosphonothionates with particular substitutions. The featured product, O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate, is characterized by its methylphosphonothionate core, with ester linkages to a chloropropyl group and a nitrophenyl group that also bears a trifluoromethyl substituent. These compounds often find application as intermediates in chemical synthesis, particularly within the agricultural or pharmaceutical sectors, due to the reactive nature of their functional groups.

Distinguishing this category from its siblings, such as methylphosphonic dichloride (2931.51.00.00) and propylphosphonic dichloride (2931.52.00.00), is crucial. The dichlorides are reactive intermediates characterized by two chlorine atoms attached to the phosphorus, whereas this category encompasses compounds with ester linkages and more complex organic substituents. Trichlorfon (2931.54.00.00) is another distinct compound, typically used as an insecticide, which differs in its structural arrangement and intended application. The "Other" category (2931.59.00) serves as a residual for similar halogenated organo-phosphorous derivatives not specifically enumerated.

As this classification node is a leaf node, there are no further subcategories. Therefore, the classification of goods under 2931.53.00.00 relies on a precise match of the chemical structure and composition to the detailed description provided. Importers and exporters must ensure that the product's chemical name and structure align precisely with the exemplified compound to ensure correct classification.