Caustic Calcined Magnesite Powder from Canada
Fine powder produced by calcining natural magnesite at moderate temperatures to yield reactive magnesium oxide with some residual CO2. Classified under HTS 2519.90.20.00 as caustic calcined magnesite, distinct from dead-burned or fused magnesia due to its lower sintering temperature and higher reactivity.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Verify purity and calcination specs via lab analysis to confirm classification as caustic calcined vs dead-burned magnesia
• Include certificates of analysis showing MgO content >85% and loss on ignition to prove it's not fused magnesia
• Avoid misclassification as chemical-grade MgO by documenting industrial mineral end-use like refractories