Ulexite Calcium Borate

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.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳ChinaFree+35.0%35%
🇲🇽MexicoFree+10.0%10%
🇨🇦CanadaFree+10.0%10%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+10.0%10%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2840.30.00Higher: 38.7% vs 35%

If sodium content dominates or refined for chemical use

Sodium borates or purified variants shift to Chapter 28 boron compounds, excluding natural calcium-specific minerals.

2517.20.00Same rate: 35%

If pebblized or sintered for industrial handling

Chapter note prioritizes heading 2517 for any processed pebbles, even if originally calcium borates, over raw forms.

3824.99Lower: 15% vs 35%

If chemically prepared as prepared binders

Cultured or chemically derived borates for industrial binders fall under Chapter 38 chemical preparations.

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Import Tips & Compliance

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