Halogenated waste organic solvents — spent chlorinated, fluorinated, brominated, or iodinated solvents such as used trichloroethylene, perchloroethylene, or methylene chloride — are classified under tariff line 3825410000 and are distinguished from non-halogenated solvent wastes by their higher toxicity and stricter disposal requirements. Under RCRA, many of these materials qualify as listed hazardous wastes (F-list or U-list), triggering manifest, storage, and treatment standards that importers must satisfy before the goods can be accepted at a US facility. The halogenated designation is critical at classification: mixing halogenated and non-halogenated solvent wastes can create classification ambiguity and compliance risk.

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