Anhydrous Zinc Sulfate from China
Anhydrous zinc sulfate (ZnSO4) is the water-free form used in pharmaceuticals, electroplating, and as a catalyst precursor. It qualifies for HTS 2833.29.45.00 as a chemically pure sulfate of zinc per Chapter 28 notes. This fine white powder is highly reactive due to lack of hydration.
Duty Rate — China → United States
26.6%
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide assay certificates showing <0.5% water content to distinguish from hydrates and prevent disputes
• Pharma-grade requires FDA prior notice if for drug use; separate from industrial imports
• Avoid classifying as reagent kit; pure compounds stay in Chapter 28, kits go to 3822