2519.90.50.00/Dunite-Derived Magnesium Oxide/Mexico

Dunite-Derived Magnesium Oxide from Mexico

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 — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

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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