2931.54.00.00 - Trichlorfon (ISO)

This HTS classification, 2931.54.00.00, specifically covers Trichlorfon, an organophosphorus insecticide. Trichlorfon is characterized by its chemical structure, which includes phosphorus, chlorine, and carbon atoms, and its primary function as a pesticide used in agriculture and veterinary medicine. This category falls under the broader heading of halogenated organo-phosphorous derivatives, indicating compounds where phosphorus atoms are bonded to both organic groups and halogen atoms.

The distinction of this specific code lies in its singular focus on Trichlorfon, identified by its International Organization for Standardization (ISO) common name. Unlike its sibling categories which describe specific phosphonic dichloride compounds (e.g., Methylphosphonic dichloride and Propylphosphonic dichloride) or a more complex methylphosphonothionate derivative, 2931.54.00.00 is dedicated solely to this particular organophosphate. The "Other" category at 2931.59.00 would encompass any other halogenated organo-phosphorous derivatives not otherwise specified.

As this is a leaf node within the HTS, there are no further subcategories to introduce. Therefore, classification within 2931.54.00.00 is determined by the definitive identification of Trichlorfon itself, based on its chemical composition and intended use as an insecticide, ensuring accurate customs declaration and duty assessment.