Doré Slime with Copper Impurities from Mexico
Refinery slime from doré processing containing residual copper alongside precious metals, concentrated for recovery. Classified under HTS 2616.90.00.10 due to copper content reporting in precious metal concentrates category. Not slag under heading 2620 as it's ore-derived.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Classify based on origin as ore concentrate, not as 2620 residues unless industrially processed for extraction
• Laboratory certificates must specify copper assay for statistical reporting accuracy
• Beware reclassification if copper content suggests base metal concentrate under Chapter 26