2904.91.00.00 - Trichloronitromethane (chloropicrin)

This HTS classification, 2904.91.00.00, specifically covers trichloronitromethane, also commonly known as chloropicrin. Chloropicrin is a chlorinated nitro compound derived from methane. It is primarily recognized for its use as a fumigant, insecticide, and nematicide. Its distinctive pungent odor and potent biocidal properties are key identifiers for this substance.

This specific heading differentiates itself from other categories within 2904 by its precise chemical composition and intended application. While other headings within 2904.99 might cover other sulfonated, nitrated, or nitrosated hydrocarbon derivatives that are not trichloronitromethane, 2904.91.00.00 is singularly dedicated to this particular compound. The focus is on the presence of both halogen (chlorine) and nitro functional groups on a methane backbone, resulting in the specific properties of chloropicrin.

As this classification represents a leaf node, there are no further subdivisions. Therefore, classification within 2904.91.00.00 is definitive for shipments of pure trichloronitromethane or preparations where it is the sole or predominant active ingredient and falls within the scope of the description. It's crucial to consult specific regulatory requirements and safety data sheets for handling and import/export purposes, as chloropicrin is a regulated substance in many jurisdictions due to its toxicity.