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
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
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.
If pebblized or sintered for industrial handling
Chapter note prioritizes heading 2517 for any processed pebbles, even if originally calcium borates, over raw forms.
If chemically prepared as prepared binders
Cultured or chemically derived borates for industrial binders fall under Chapter 38 chemical preparations.
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The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
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
Related Products under HTS 2528.00.00.10
Colemanite Ore
Colemanite is a naturally occurring white to colorless calcium borate mineral (Ca2B6O11·5H2O) mined primarily from evaporite deposits in California and Turkey. It falls under HTS 2528.00.0010 as a natural calcium borate, unprocessed except for basic concentration, used as a source of boron in various industries. This statistical suffix specifically covers calcium borate variants like colemanite without chemical separation from brine.
Priceite Natural Borate
Priceite is a rare calcium borate hydroxide mineral (Ca4MgB10O19(OH)10·6H2O) found in boron deposits, appearing as yellow-brown crystals. It qualifies for HTS 2528.00.0010 as a natural calcium borate concentrate from mining operations, not including brine-extracted forms. Primarily used in research and specialty boron applications.
Hydroboracite Crude Concentrate
Hydroboracite (CaMgB6O11·6H2O) is a white fibrous calcium magnesium borate mineral extracted from evaporite basins and concentrated via flotation. It is classified in HTS 2528.00.0010 as natural calcium borates, provided no brine separation occurs. Common in fertilizers and glass flux production.
Pandermite Calcium Borate Lump
Pandermite, a variety of colemanite, is supplied as natural calcium borate lumps from Turkish deposits, with B2O3 content around 30-35%. HTS 2528.00.0010 covers this uncalcined, non-brine form for boron sourcing in detergents and enamels. It remains in raw mineral state post basic crushing.