Polyphosphoric Acid 105% for Flame Retardant Synthesis from Mexico
Polyphosphoric acid at 105% H3PO4 strength, employed in manufacturing ammonium polyphosphate flame retardants. Classified under HTS 2809.20.00.40 for its polymeric phosphoric acid structure.
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
• Certify P2O5 content >80% to avoid downgrade to orthophosphoric acid
• Include end-use statement for flame retardant production to aid classification
• Monitor REACH-like compliance for phosphorus chemicals in supply chain