Dunite-Derived Magnesium Oxide from Canada
Magnesium oxide calcined from dunite rock (olivine), used in steelmaking and refractories. Classified under HTS 2519.90.50.00 as other magnesium oxide from natural mineral sources.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document source rock analysis showing magnesium oxide predominance
• Distinguish from fused magnesia via melting point tests if challenged
• Silica content declaration important; high silica may affect classification