Calcined Alumina 99.8% Pure 5 Micron from China
Ultra-high purity calcined alumina powder (5 micron, 99.8% Al2O3) for LED substrates and electronic ceramics. HTS 2818.10.20.90 covers this pulverized artificial corundum, refined to exacting chemical specifications. Essential for sapphire crystal growth precursors.
Duty Rate — China → United States
8.8%
Rate breakdown
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Electronic-grade requires <10ppm impurities; include full elemental analysis
• Moisture content critical (<0.3%); specify in contracts to prevent clumping
• Cleanroom packaging mandatory for semiconductor destinations