Aluminum oxide, other than artificial corundum
Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide: > Aluminum oxide, other than artificial corundum
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
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.
Nano-Alumina Particles
Nanometer-sized aluminum oxide particles for advanced composites and coatings. Pure chemically defined compound under HTS 2818.20.00.00.
White Fused Alumina Fines
Fine powder byproduct from white fused aluminum oxide production, used in precision casting. Still classified as aluminum oxide under HTS 2818.20.00.00 if not artificial corundum grade.
Alumina for Sapphire Crystal Growth
High-purity powder for Verneuil process sapphire (artificial corundum) growth, supplied as raw material. HTS 2818.20.00.00 before crystal formation.
Low-Soda Alumina for Spark Plugs
Special low-sodium aluminum oxide for ceramic spark plug insulators. Chemically defined under HTS 2818.20.00.00.
Technical-Grade Alumina Powder
Standard 99%+ Al2O3 powder for general industrial fillers and extenders. Standard chemically defined aluminum oxide of HTS 2818.20.00.00.
Fused Mullite-Grade Alumina
Synthetic aluminum oxide with controlled mullite formation for investment casting shells. HTS 2818.20.00.00 for aluminum oxide other than artificial corundum.
Alumina Trihydrate Fines (Gibbsite)
Fine aluminum hydroxide (Al(OH)3) powder processed to aluminum oxide specification. Borderline classification under HTS 2818.20.00.00 when meeting oxide purity.
Alumina Hydrate Calcine Intermediate
Partially calcined aluminum hydroxide intermediate for pigment production. Meets HTS 2818.20.00.00 aluminum oxide criteria.