HTS Heading 2809

Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined

All 5 HTS codes under heading 2809 (diphosphorus pentaoxide), with their duty rates from the 2026 HTS Revision 23. General duty Free.

Every line of heading 2809

  • 2809 Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined.
  • 2809.10.00.00 Diphosphorus pentaoxide (under: Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined) (kg): General Free; Special none; Column 2 25%.
  • 2809.20.00 Phosphoric acid and polyphosphoric acids: General Free; Special none; Column 2 Free.
  • 2809.20.00.10 Containing less than 65 percent available diphosphorus pentaoxide (P2O5) equivalents (t).
  • 2809.20.00.20 Other (under: Fertilizer grade) (t).
  • 2809.20.00.30 Other (under: Phosphoric acid) (t).
  • 2809.20.00.40 Polyphosphoric acids (under: Phosphoric acid and polyphosphoric acids) (t).

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.