2931.59.00 - Other

This HTS category, "Other organo-phosphorous derivatives: Halogenated organo-phosphorous derivatives: Other" (2931.59.00), encompasses a diverse range of organo-phosphorous compounds that contain halogen atoms and do not fit into the more specifically defined sibling categories. These compounds are characterized by the presence of both organic and inorganic elements, with phosphorus bonded to carbon atoms and at least one halogen atom. This broad scope includes complex chemical intermediates and specialized products not otherwise enumerated.

Unlike its sibling categories which detail specific compounds such as Methylphosphonic dichloride (2931.51.00.00) or Trichlorfon (ISO) (2931.54.00.00), this category serves as a residual for halogenated organo-phosphorous derivatives that do not possess the precise structures or common names identified in those more granular classifications. The key distinguishing factor is the lack of specific structural mandates found in the sibling codes, allowing for a wider array of chemical variations.

The subcategories within 2931.59.00.00 provide further refinement for specific types of halogenated organo-phosphorous compounds. These include phosphonofluoridates and phosphonyl difluorides with specific alkyl substitutions (2931.59.00.10 and 2931.59.00.15), specific chloridates like O-Isopropyl methylphosphonochloridate (2931.59.00.20), and complex phosphonamidic fluorides (2931.59.00.30 and 2931.59.00.35). Additionally, it covers compounds with a phosphorus atom bonded to a methyl, ethyl, n-propyl, or isopropyl group and no further carbon atoms (2931.59.00.60), with a final residual "Other" code (2931.59.00.80) for any remaining, unclassified halogenated organo-phosphorous derivatives within this broader group.