Blister Copper Buttons from China
Small button-shaped castings of blister copper from fire refining, serving as test samples or furnace charge. Under HTS 7402.00.00.00 as unrefined copper ahead of electrolytic refining. Typical 98-99% Cu with gas porosity characteristic of blister form.
Duty Rate — China → United States
25%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Supply button assay results showing characteristic impurities (O2, S) of fire-refined blister copper
• Document intended remelt use in anode furnaces to confirm unrefined status
• Declare exact button weights; larger castings risk categorization as crude anodes