Hydroboracite Borate Mineral Powder from Canada
Hydroboracite, a magnesium calcium borate, is ground into powder for enamel frits and insulation compounds. Classifies under HTS 2528.00.0050 as other natural borate concentrates from solid deposits, under 85% H3BO3 dry. Non-brine origin confirmed via mining records.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Ensure grind size uniformity for customs sampling; declare exact B2O3 equivalent
• Avoid bulk bags prone to sifting during handling