Industrial Polyphosphoric Acid for Polymer Catalysts from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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