Calcined Alumina Powder
High-purity calcined aluminum oxide (Al2O3) powder used in ceramic production and refractories. It is chemically defined as aluminum oxide but not processed into artificial corundum, distinguishing it from synthetic gem materials under HTS 2818.20.00.00.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing more than 0.5% by weight calcined alumina
Aluminum hydroxide with significant calcined alumina content shifts to subheading 2818.30.
If processed into millstones, grindstones or grinding wheels
When formed into abrasive articles, it falls under Chapter 68 for worked mineral products.
If chemically modified or mixed with organic binders for chemical preparations
Organo-inorganic mixtures or preparations are excluded from Chapter 28 per chapter notes.
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Import Tips & Compliance
• Verify purity and chemical definition per Chapter 28 Note 1 to confirm classification as aluminum oxide
• Provide certificates of analysis showing Al2O3 content >99% to avoid misclassification as artificial corundum
• Ensure packaging labels distinguish from abrasive-grade materials to prevent reclassification under Chapter 68
Related Products under HTS 2818.20.00.00
Activated Alumina Desiccant
Porous aluminum oxide beads activated for moisture adsorption in gas drying and water purification. Classified under HTS 2818.20.00.00 as chemically defined aluminum oxide, excluding artificial corundum used for abrasives.
High-Purity Alumina for LEDs
Ultra-fine 99.99% pure aluminum oxide powder for LED substrate manufacturing and electronics ceramics. Falls under HTS 2818.20.00.00 as chemically defined Al2O3 other than artificial corundum.
Tabular Alumina for Refractories
Dense, tabular-shaped aluminum oxide grains produced by sintering for high-temperature refractory bricks. Classified in HTS 2818.20.00.00 as aluminum oxide distinct from artificial corundum abrasives.
Alpha Alumina Catalyst Support
Alpha-phase aluminum oxide spheres used as inert support for petroleum refining catalysts. HTS 2818.20.00.00 applies to this chemically defined compound other than artificial corundum.
Reactive Alumina for Ceramics
Fine reactive aluminum oxide powder with high sintering reactivity for technical ceramics. Falls under HTS 2818.20.00.00 as pure aluminum oxide, not artificial corundum.
Aluminum Oxide Polishing Powder
Colloidal-grade aluminum oxide powder for precision optical lens polishing. Chemically defined under HTS 2818.20.00.00, separate from artificial corundum abrasives.