3827.90 - Other:

This category, HTS 3827.90, encompasses "Other" mixtures containing halogenated derivatives of methane, ethane, or propane that are not specifically provided for in preceding headings within Chapter 38. This residual category acts as a catch-all for such chemical mixtures when their specific halogenated components and overall composition do not align with the more narrowly defined sibling categories. The key criterion for inclusion here is that the mixture's primary characteristic is its content of halogenated hydrocarbons derived from methane, ethane, or propane, and it does not fit into the more specific subheadings that detail particular halogenated compounds like CFCs, HCFCs, or specific halons.

Unlike sibling categories that detail mixtures containing specific combinations of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), perfluorocarbons (PFCs), or hydrofluorocarbons (HFCs), or those containing specific single compounds like bromochlorodifluoromethane (Halon-1211) or methyl bromide, HTS 3827.90 covers mixtures where these defined constituents are absent or present in a way that doesn't trigger those more specific classifications. For instance, a mixture containing halogenated derivatives of methane or ethane that are not primarily regulated as refrigerants or ozone-depleting substances, and which don't fit into the defined combinations of other halocarbons, would likely fall under this residual category.

The subcategories within HTS 3827.90 further refine the classification based on the nature of the halogenation. Subheading 3827.90.10.00 specifically addresses mixtures that are chlorinated but not otherwise halogenated, indicating a focus on chlorine as the sole halogenating agent. The broader subheading 3827.90.90.00 then captures all remaining mixtures that meet the general criteria of this category but are not classified under the "chlorinated but not otherwise halogenated" provision, effectively covering mixtures with other combinations of halogens or halogenated hydrocarbons not otherwise specified.