Ulexite Calcium Borate from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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