Kernite Borate Concentrate from Mexico
Kernite, a sodium borate mineral from California's Searles region, is concentrated into powder for export, often partially calcined. HTS 2528.00.00 applies as it's a natural borate from solid deposits, not brine, powering boron supply chains. Essential for herbicides and enamels.
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
• Provide dehydration process details if calcined to confirm natural status
• Monitor boron assay consistency across shipments for valuation accuracy