Yes. Copper scrap that is contaminated or mixed with other materials may be classified as hazardous waste under the Basel Convention, subjecting it to prior informed consent procedures between exporting and importing countries. Clean, specification-grade copper scrap generally moves more freely, but traders should verify the regulatory status of each scrap grade under both US EPA rules and the destination country's import requirements.

Heading 7404 covers copper waste and scrap in forms suitable for remelting or reprocessing as a metal. Copper-bearing residues that are primarily chemical in nature (such as copper sulfate solutions or copper-bearing slags) may classify outside Chapter 74 entirely, under chemical or mineral headings. The physical form and intended use — metal recovery vs. chemical processing — guide the classification decision.