Cement Copper Nuggets from Canada
Nugget-form unrefined copper recovered by cementation from acidic mine drainage waters. Classifies under HTS 7402.00.00.00 as unrefined copper requiring smelting and electrolytic refining. Typical purity 60-80% copper with iron/silica impurities.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Include production process certification (cementation from leach solutions) to validate unrefined status
• Provide particle size distribution; powder forms risk reclassification as copper powders under 7406
• Test for hazardous impurities (arsenic, lead); may require additional EPA declarations