2809.20.00.40
Phosphoric acid and polyphosphoric acids / Polyphosphoric acids
Classification path
- Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined
- Phosphoric acid and polyphosphoric acids
- Polyphosphoric acids
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- Free
- Unit of quantity
- t
Related lines in heading 2809
About heading 2809
Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined
Heading 2809 covers diphosphorus pentaoxide, phosphoric acid, and polyphosphoric acids, whether or not chemically defined. It splits first between diphosphorus pentaoxide in 2809.10 and phosphoric acid or polyphosphoric acids in 2809.20. The 2809.20 lines separate fertilizer-grade phosphoric acid by available P2O5 equivalent, other phosphoric acid, and polyphosphoric acids.
Full guide to heading 2809Products in this heading
- Diphosphorus pentaoxide used as a dehydrating agent
- Fertilizer-grade phosphoric acid containing less than 65% available diphosphorus pentaoxide equivalents
- Other fertilizer-grade phosphoric acid
- Technical or food-grade phosphoric acid
- Polyphosphoric acid used in chemical synthesis
- Phosphoric acid used for metal treatment or pH adjustment
Frequently asked questions
What is the HTS code for phosphoric acid?
Fertilizer-grade phosphoric acid with less than 65% available diphosphorus pentaoxide equivalents is 2809.20.00.10, general (MFN) Free; other phosphoric acid is 2809.20.00.30, general (MFN) Free.
What is the duty on polyphosphoric acids?
Polyphosphoric acids are classified in 2809.20.00.40, general (MFN) Free.
How do I classify diphosphorus pentaoxide?
Diphosphorus pentaoxide is classified in 2809.10.00.00, general (MFN) Free.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.