Dunite-Derived Magnesium Oxide from China
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 — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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