Heading 2809: Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically…
Every line of heading 2809 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined
Chapter 28: Inorganic chemicals. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 2809.10.00.00 | Diphosphorus pentaoxide | Free |
| 2809.20.00 | Phosphoric acid and polyphosphoric acids | Free |
| 2809.20.00.10 | Containing less than 65 percent available diphosphorus pentaoxide (P2O5) equivalents | |
| 2809.20.00.20 | Other | |
| 2809.20.00.30 | Other | |
| 2809.20.00.40 | Polyphosphoric acids |
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2809 has 5 of them. Schedule B lookup →
- 2809.10.0000DIPHOSPHORUS PENTAOXIDE
- 2809.20.0010PHOSPHORIC ACID,FERTILIZER GRADE,CONTAINING LESS THAN 65 PERCENT AVAILABLE P205 EQUIVALENTS
- 2809.20.0020PHOSPHORIC ACID,FERTILIZER GRADE,CONTAINING 65 PERCENT OR MORE AVAILABLE P205 EQUIVALENTS
- 2809.20.0030PHOSPHORIC ACID OTHER THAN FERTILIZER GRADE
- 2809.20.0040POLYPHOSPHORIC ACIDS
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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