Phosphorus Pentoxide-Derived Polyphosphoric Acid from Germany
Polyphosphoric acid produced by dissolving diphosphorus pentoxide (P2O5) in phosphoric acid, forming chains of (HPO3)n. It is used in cyclization reactions and as a dehydrating agent, classified in HTS 2809.20.00.40 as polyphosphoric acids.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Provide manufacturing process details or NMR spectra confirming polyphosphoric structure
• Store and ship in moisture-proof containers to prevent hydrolysis to orthophosphoric acid
• Label with exact H3PO4 equivalent percentage for CBP verification