White Calcined Alumina 99.8% for Refractories from Canada
White calcined alumina grains with 99.8% Al2O3 content, thermally processed for low soda impurities in refractory production. Meets HTS 2818.10.20.10 criteria as white artificial corundum, ground form exceeding purity threshold. Essential for high-temperature kiln linings.
Duty Rate — Canada → United States
1.3%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Certify soda content (<0.3%) alongside Al2O3 purity to support classification
• Document alpha-phase crystal structure confirming artificial corundum nature
• Beware bulk packaging mislabeled as finished refractories; declare as raw material