Calcined Witherite Lumps from China
Witherite ore that has undergone thermal calcination to remove impurities while retaining its natural barium carbonate composition in lump form. Falls under HTS 2511.20.00.00 as calcined natural barium carbonate, explicitly covered in the heading excluding only barium oxide. Primarily used in glass manufacturing and chemical synthesis.
Duty Rate — China → United States
35%
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
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)
Import Tips
• Include calcination process certificates showing temperature controls to prove it remains barium carbonate, not converted to oxide
• Declare exact calcination method and BaCO3 content to comply with statistical reporting requirements
• Watch for misclassification as barium oxide if over-calcined; test samples if challenged by customs