Alpha Alumina Catalyst Support
Alpha alumina catalyst support consists of alpha-phase aluminum oxide spheres used as an inert substrate for petroleum refining catalysts. It is a chemically defined aluminum oxide compound, not processed into artificial corundum, and falls under this tariff item as aluminum oxide other than artificial corundum.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the spheres are fused and used as abrasives
Fused alumina for abrasive use is artificial corundum.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide a certificate of analysis confirming the alpha-phase and chemical purity of the aluminum oxide
• Clearly document that the spheres are not abrasive-grade artificial corundum
• If the support is impregnated with catalysts, check if it might be classified elsewhere
Related Products under Tariff item 2818.20.00
Activated Alumina Desiccant
Activated alumina desiccant consists of porous aluminum oxide beads engineered for moisture adsorption in gas drying and water purification systems. It is a chemically defined aluminum oxide product, distinct from artificial corundum, and is classifiable under this tariff item as aluminum oxide other than artificial corundum.
Alumina for Sapphire Crystal Growth
Alumina for sapphire crystal growth is a high-purity aluminum oxide powder supplied as a raw material for the Verneuil process to grow synthetic sapphire (artificial corundum). At the time of import, it is a chemically defined aluminum oxide powder, not yet formed into artificial corundum, and is classifiable under this tariff item.
Alumina Hydrate Calcine Intermediate
Alumina hydrate calcine intermediate is a partially calcined aluminum hydroxide material intended for further processing into pigment-grade alumina. It is presented as an aluminum oxide product and is classifiable under this tariff item as aluminum oxide other than artificial corundum, provided it meets the chemical definition of aluminum oxide.
Alumina Trihydrate Fines (Gibbsite)
Alumina trihydrate fines (gibbsite) is a fine aluminum hydroxide powder processed to meet aluminum oxide specifications. While it is chemically aluminum hydroxide, if it is presented as an aluminum oxide product with appropriate processing, it may be classifiable under this tariff item as aluminum oxide other than artificial corundum.
Aluminum Oxide Polishing Powder
Aluminum oxide polishing powder is a colloidal-grade aluminum oxide powder used for precision optical lens polishing. It is a chemically defined aluminum oxide product, distinct from artificial corundum abrasives, and falls under this tariff item as aluminum oxide other than artificial corundum.
Calcined Alumina Powder
Calcined alumina powder is a high-purity calcined aluminum oxide (Al2O3) powder used in ceramic production and refractories. It is chemically defined as aluminum oxide and is not processed into artificial corundum, distinguishing it from synthetic gem materials, and is classifiable under this tariff item.