High Purity Synthetic Calcium Carbonate from Mexico
99.9% pure synthetic CaCO3 produced via controlled precipitation for electronic ceramics and high-voltage insulators, HTS 2836.50.00.00. Ultra-low impurity levels critical for dielectric properties.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• ICP-MS analysis required showing <1 ppm Na, <5 ppm Fe impurities
• Validate polymorph content (100% calcite) via XRD for ceramic pressing
• ESD-safe packaging for electronic component manufacturers