Strontium Carbonate Powder (99% Purity) from China
High-purity strontium carbonate (SrCO3) powder used primarily in the production of strontium chemicals and as a flux in ceramics. It falls under HTS 2836.92.00.00 as a chemically defined carbonate of strontium, explicitly listed in the 'Other' category of carbonates per Chapter 28 notes. This inorganic compound meets the criteria for classification in this heading, excluding organo-inorganic compounds.
Duty Rate — China → United States
29.2%
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
• Verify purity and chemical composition via lab analysis to confirm 'chemically defined' status per Chapter 28 Note 1; ensure SDS and COA documentation for customs clearance
• Avoid misclassification as organo-inorganic compounds (Chapter 29)
• Watch for strontium content thresholds to prevent reclassification under rare earths