Ulexite Calcium Borate from Canada
Ulexite, known as TV rock, is a hydrated sodium calcium borate mineral (NaCaB5O6(OH)6·5H2O) that appears fibrous and translucent, sourced from boron-rich lake beds. Classified under HTS 2528.00.0010 for its natural calcium borate composition, it is exported as crude ore for boron extraction. The code applies to concentrates not chemically altered from natural deposits.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Require geological assays proving natural calcium borate dominance and no H3BO3 exceeding 85%; label shipments clearly to distinguish from synthetic borates
• Check for export quotas from major producers like Turkey or Argentina
• Use proper ventilation in storage to prevent moisture-induced clumping affecting purity claims