2919.90.30.00 - Other

This category, HTS 2919.90.30.00, encompasses phosphoric esters and their salts, including lactophosphates, and their halogenated, sulfonated, nitrated, or nitrosated derivatives, that do not fall under other more specific subdivisions. It serves as a residual category for a diverse range of organophosphate compounds. These are often characterized by their structure involving a phosphorus atom bonded to oxygen atoms, with at least one of these oxygens being part of an ester linkage, and the remaining substituents being organic groups.

It is crucial to distinguish this "Other" category from its sibling, "Plasticizers" (which would be found under a different HTS code). While some phosphoric esters may exhibit plasticizing properties, this specific classification is not limited to that function. Instead, it captures a broader array of organophosphates based on their chemical structure and the absence of other specific qualifying characteristics that would direct them to a more precise HTS subheading.

As this node is a leaf node, there are no further subcategories to introduce. Classification within HTS 2919.90.30.00 is determined by the chemical composition and structure of the product. Importers and exporters should refer to chemical literature and analytical data to confirm that a product is indeed a phosphoric ester or its derivative and does not meet the criteria for any other more specifically described subheading within the 2919 HTS chapter.