2812.13.00.00 - Phosphorous trichloride

This HTS category, specifically HTS code 2812.13.00.00, encompasses phosphorous trichloride. Phosphorous trichloride is a colorless to pale yellow fuming liquid with the chemical formula PCl₃. It is a highly reactive inorganic compound primarily used as a raw material in the synthesis of other phosphorous compounds, including phosphorous oxychloride, phosphorous pentachloride, and various organophosphorous chemicals utilized in the production of pesticides, flame retardants, and plasticizers.

To distinguish this entry from its siblings, it's important to note the specific element and degree of chlorination. For instance, while both 2812.12.00.00 (phosphorous oxychloride) and 2812.14.00.00 (phosphorous pentachloride) also involve phosphorous and chlorine, they represent different chemical compounds with distinct properties and applications. Phosphorous trichloride is characterized by having three chlorine atoms bonded to a central phosphorus atom, setting it apart from the oxychloride (which contains oxygen) and the pentachloride (which contains five chlorine atoms).

As HTS code 2812.13.00.00 is a leaf node, there are no further subcategories within this specific tariff line. Therefore, classification at this level relies on accurately identifying the substance as phosphorous trichloride based on its chemical composition and properties. The broader parent categories, "Halides and halide oxides of nonmetals" and "Chlorides and chloride oxides," provide the overarching context for inorganic compounds of this nature.