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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If impregnated with supported catalysts like platinum
Catalysts supported on aluminum oxide are classified in heading 3815.
If for porcelain/ceramic crucibles with alumina bodies
Articles of porcelain or ceramic crucibles take precedence in Chapter 69.
If used as inorganic luminophore pigment
Chapter notes exclude luminophores from Chapter 28 to heading 3206.
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Import Tips & Compliance
• Include XRD analysis confirming alpha-phase crystal structure
• Document porosity and crush strength for catalyst-grade verification
• Ensure no active catalytic metals present to avoid heading 3815 classification
Related Products under HTS 2818.20.00.00
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.
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.
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.