Calcined Ulexite Ore Concentrate from Mexico
Ulexite is a natural sodium calcium borate mineral concentrated and calcined for industrial use in glass and ceramics production. It falls under HTS 2528.00.0005 as a natural sodium borate concentrate that has been calcined, excluding borates separated from brine. This form enhances solubility for manufacturing applications.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Verify mineral composition via assay certificates to confirm sodium borate content; ensure calcination process documentation to avoid misclassification as unprocessed ore
• Check for radioactive impurities common in borate deposits