2812.11.00.00 - Carbonyl dichloride (phosgene)

This HTS category, 2812.11.00.00, specifically classifies carbonyl dichloride, more commonly known as phosgene. Phosgene is a highly toxic gas at room temperature, often used as a chemical intermediate in the production of plastics, pesticides, and pharmaceuticals. Its classification under Chapter 28 signifies its status as an inorganic chemical compound.

Within the broader category of "Chlorides and chloride oxides" under "Halides and halide oxides of nonmetals," phosgene is distinguished by its specific chemical structure, featuring a carbonyl group bonded to two chlorine atoms. Unlike its siblings such as phosphorus oxychloride (2812.12.00.00) or sulfur dichloride (2812.16.00.00), which involve different nonmetal elements and varying functional groups, phosgene is solely composed of carbon, oxygen, and chlorine, with the defining carbonyl linkage.

As this classification is a leaf node, there are no further subcategories. Therefore, the focus remains on precisely identifying phosgene based on its chemical identity and inherent properties. Accurate classification hinges on recognizing this compound by its chemical name, CAS number, or definitive analytical testing confirming its composition and structure, distinguishing it from other inorganic chlorides and their oxides within this chapter.