Industrial Dolomite Lump for Refractories from Mexico
Lump dolomite sized 2-6 inches for refractory brick feedstock, not calcined or sintered, rectangular block form. HTS 2518.10.00.00 applies to this unsintered industrial mineral product.
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
• Size grading certificates (lump specifications) prevent gravel misclassification under 2517
• MgO/CaO ratio assays confirm dolomite identity vs limestone substitutes
• Bulk container loading maintains 'block/slab' form factor requirement