High-Purity Anhydrous Sodium Tetraborate from Mexico
High-purity anhydrous Na2B4O7 for laboratory reagents and pharmaceutical intermediates. It is classified in HTS 2840.11.00.00 as refined anhydrous disodium tetraborate, a chemically defined borate per Chapter 28 notes. Devoid of crystal water, distinguishing it from pentahydrate forms.
Duty Rate — Mexico → United States
10.3%
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
• Obtain Certificate of Analysis (CoA) specifying anhydrous purity >99% for customs validation
• Comply with REACH-like regulations if transshipping through EU; provide toxicity data
• Use proper NA/UN numbers for shipping as it may be regulated as an irritant