3827.40.00.00 - Containing methyl bromide (bromomethane) or bromochloromethane

This HTS category, 3827.40.00.00, specifically classifies mixtures that contain methyl bromide (also known as bromomethane) or bromochloromethane. These substances are typically halocarbons with distinct chemical properties. The classification applies to any mixture where these specific compounds are present, regardless of their concentration, as long as they are not specifically covered elsewhere in the tariff schedule.

When classifying under Chapter 38, it is crucial to differentiate this sub-heading from its siblings. For instance, sibling categories exist for mixtures containing chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), perfluorocarbons (PFCs), hydrofluorocarbons (HFCs), and specific halons like bromochlorodifluoromethane. The distinguishing factor for 3827.40.00.00 is the exclusive presence of methyl bromide or bromochloromethane, or their presence alongside other components not specifically enumerated in the sibling categories. This ensures that mixtures solely characterized by the presence of these two particular halocarbons are appropriately categorized.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, the focus for classification purposes rests solely on the definitive presence of methyl bromide or bromochloromethane within the mixture. Examples of goods that might fall under this classification could include certain fumigants, industrial solvents, or refrigerants where these specific compounds are key components, provided they are not otherwise classified by their primary function or more specific composition.