Flash-Calcined Aluminum Hydroxide (Adsorbent)
Flash-calcined aluminum hydroxide is produced by rapidly heating aluminum hydroxide to drive off partial water content, creating a high-porosity material that serves as a precursor to activated alumina. It retains more than 50% hydroxide content, which qualifies it for classification under tariff item 2818.30.00 as aluminum hydroxide rather than as aluminum oxide. This product is commonly used in gas and liquid adsorption applications, including dehydration processes.
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 flash-calcination process reduces hydroxide content to 50% or less
The product would then be considered aluminum oxide rather than aluminum hydroxide.
If the material is further processed into artificial corundum
Artificial corundum is classified separately from aluminum hydroxide.
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
• Ensure the hydroxide content exceeds 50% after flash calcination to support classification under 2818.30.00; provide lab analysis if requested by CBSA
• Declare the product's end use (e.g
• adsorption) to avoid misclassification as aluminum oxide
• Keep records of the calcination process parameters in case of a tariff verification
Related Products under Tariff item 2818.30.00
Aluminum Hydroxide Flame Retardant Filler
Micronized aluminum hydroxide used as a halogen-free flame retardant and smoke suppressant in plastics and rubber. It is a chemically defined compound (Al(OH)3) of high purity, meeting the terms of Chapter 28 Note 1(a) and classified under tariff item 2818.30.00.
Aluminum Hydroxide Gel USP (Antacid Suspensions)
USP-grade aluminum hydroxide gel for liquid antacid formulations and phosphate binders. Despite being in gel form, it is a chemically defined compound of aluminum hydroxide, meeting Chapter 28 Note 1(b) as a product dissolved or suspended in water, and is classifiable under tariff item 2818.30.00.
Aluminum Hydroxide Paper Filler Precipitate
Precipitated aluminum hydroxide used as a retention aid and filler in alkaline paper manufacturing. With chemical purity exceeding 99.5% Al(OH)3, it qualifies as a separate chemically defined compound under Chapter 28 Note 1(a) and is classified under tariff item 2818.30.00.
Aluminum Hydroxide Powder (Pharmaceutical Grade)
Fine aluminum hydroxide powder used as an antacid in pharmaceutical formulations. It is a chemically defined compound of high purity, distinct from mixed or impure preparations, and therefore falls under tariff item 2818.30.00 as aluminum hydroxide.
Athermal Aluminum Trihydroxide (Cable Compounds)
High-purity aluminum trihydroxide (ATH) processed for low-smoke zero-halogen (LSZH) cable insulation compounds. It is a chemically defined compound with optimized particle morphology, meeting Chapter 28 Note 1(a) and classified under tariff item 2818.30.00.
Gibbsite Aluminum Hydroxide (Bayer Process)
Crystalline gibbsite form of aluminum hydroxide produced via the Bayer process from bauxite ore. It is a pure aluminum hydroxide mineral and a chemically defined compound, classifiable under tariff item 2818.30.00, despite its natural origin, as it is not a precious stone or metal.