Bio-Oxidized Gold Ore Residue from Mexico
Residue from bio-oxidation pretreatment of refractory sulfide gold ores exposing gold for cyanidation. Gold content reported under HTS 2616.90.00.40. Advanced processing intermediate.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide bioleach process validation documents
• Monitor bacterial residues for import health regulations
• Calculate gold exposure efficiency in declarations