Pandermite Calcium Borate Lump from Mexico
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.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Ensure lumps meet size specs for natural form; provide dry weight H3BO3 assays under 85%
• Beware of over-calcination during transport mimicking processed goods
• Use ISPM-15 compliant pallets for wood packaging to avoid fumigation delays