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%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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