Martialite Synthetic Aluminum Hydroxide from China
Martialite synthetic aluminum hydroxide is a manufactured form of aluminum hydroxide with a defined crystal structure, typically bayerite or another polymorph, produced for use in ceramics and catalyst manufacturing. Its synthetic origin and high surface area exceeding 200 m²/g distinguish it from natural mineral forms, supporting classification under tariff item 2818.30.00. The product is not a natural mineral and falls within the scope of chemically defined aluminum hydroxide.
Duty Rate — China → Canada
Import Tips
• Document the synthetic production process and crystal structure to demonstrate it is not a natural mineral, which CBSA may request
• Verify that the surface area and purity meet the tariff item's requirements; include technical data sheets with the customs declaration
• If the product is mixed with other substances, check whether it qualifies as a separate chemically defined compound