Black Copper Precipitate from Mexico
Black copper precipitate is a low-grade unrefined copper produced by cementation from copper-bearing solutions, containing impurities like iron and sulfur. It falls under HTS 7402.00.00.00 as unrefined copper not suitable for direct use without further processing. This material is typically used as feed for fire refining processes.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify metal content via assay certificates to confirm unrefined status and avoid misclassification as refined copper under Chapter 74 headings
• Include documentation proving the material requires electrolytic or fire refining, such as origin processing reports
• Bewatch for contamination levels; excessive purity may shift classification to copper alloys or refined forms