Industrial Polyphosphoric Acid for Polymer Catalysts from Mexico
Viscous polyphosphoric acid used as a catalyst in alkylation and polyester production, with extended phosphate chains. It is a chemically defined compound under HTS 2809.20.00.40.
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
• Test for free phosphoric acid content (<15%) to confirm poly form
• Ship in bulk tankers with heating coils to maintain fluidity
• Declare CAS 37267-86-0 or equivalent for polyphosphoric acids