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3824.99.39/Magnesium Oxide and Sodium Phosphate Hardener/Mexico

Magnesium Oxide and Sodium Phosphate Hardener from Mexico

Reactive powder blend of magnesium oxide and sodium phosphate that sets foundry molds through chemical hydration. Classified HTS 3824.99.39 as inorganic mixture for no-bake foundry systems. Provides rapid strength development without heat.

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

• Maintain MgO:NaPO4 ratio documentation for consistent reactivity; control particle size <45 microns; separate from moisture during transit

Magnesium Oxide and Sodium Phosphate Hardener from Mexico — Import Duty Rate | HTS 3824.99.39