Refined Borax Pentahydrate from Mexico
Borax pentahydrate (Na2B4O7·5H2O) is a refined crystalline form of disodium tetraborate used in detergents and herbicides. Classified under HTS 2840.19.00.00 as 'other' refined borax beyond the standard decahydrate. It qualifies as a chemically defined borate per Chapter 28 notes.
Duty Rate — Mexico → United States
10.1%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide crystal water content analysis to distinguish from decahydrate; check for peroxoborate contamination
• Pitfall: Incorrect hydration state leads to reclassification
• Use proper UN 2491 shipping for hazard class