Calcium Aluminate Cement from Mexico
Calcium aluminate cement, primarily 11CaO·7Al2O3 and 12CaO·7Al2O3 phases, is a hydraulic binder for high-temperature refractory applications. It qualifies as aluminates under HTS 2841.90.40.00 as salts of peroxometallic acids of aluminum. Supplied as fine powder for casting refractory linings.
Duty Rate — Mexico → United States
13.1%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include XRF analysis confirming aluminate phases; ASTM C71 compliance for cement labeling
• Avoid pitfall of classifying as Portland cement mix (2523)
• Dust hazard precautions required for handling