Caustic Calcined Magnesia Powder from Japan
Caustic calcined magnesia is magnesium oxide produced by low-temperature calcination of magnesite, resulting in a reactive powder used in chemical and fertilizer industries. It falls under HTS 2519.90.50.00 as 'other magnesium oxide, whether or not pure,' distinct from fused or dead-burned varieties due to its calcination process and reactivity.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Verify purity and calcination method via lab analysis to confirm classification under 2519.90 as 'other magnesium oxide' rather than fused or dead-burned
• Include certificates of analysis showing magnesium oxide content and absence of sintering to avoid reclassification
• Check for additives; small quantities of other oxides are allowed if added before sintering, but document to prevent disputes