2903.92.00.00 - Hexachlorobenzene (ISO) and DDT (ISO) (clofenotane (INN)), (1,1,1-trichloro-2,2- bis(p-chlorophenyl)ethane)

This HTS category, 2903.92.00.00, specifically covers hexachlorobenzene (ISO) and DDT (ISO), also known as clofenotane (INN) or 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane. These are highly chlorinated aromatic hydrocarbons with distinct chemical structures and historically significant, albeit now largely banned, applications. Hexachlorobenzene is a persistent organic pollutant, and DDT is a well-known insecticide.

When classifying within the "Halogenated derivatives of aromatic hydrocarbons" chapter, it is crucial to differentiate this specific entry from its siblings. For instance, 2903.91 pertains to simpler chlorinated benzenes like chlorobenzene and dichlorobenzenes. In contrast, 2903.93.00.00 is reserved for pentachlorobenzene, which has one less chlorine atom than hexachlorobenzene. Furthermore, 2903.94.00.00 is dedicated to hexabromobiphenyls, which are brominated rather than chlorinated compounds. The "Other" category, 2903.99, would encompass any halogenated aromatic hydrocarbons not explicitly listed elsewhere.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification under 2903.92.00.00 is definitive once the chemical identity of the imported or exported substance matches either hexachlorobenzene or DDT. The focus for classification professionals is therefore on accurate chemical identification to ensure adherence to trade regulations and potential import/export restrictions associated with these specific compounds.