Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined
5 declarable lines
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.
Products 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
How to choose the right subheading
- Decide whether the product is diphosphorus pentaoxide or a phosphoric acid or polyphosphoric acid.
- For phosphoric acid, decide whether it is fertilizer grade or other grade.
- For fertilizer-grade phosphoric acid, check whether available diphosphorus pentaoxide equivalents are less than 65%.
- Distinguish polyphosphoric acids from ordinary phosphoric acid.
- Chemical definition does not change the heading; the product identity and grade control the subheading.
Often confused with
- Heading 2835Sodium tripolyphosphate
It is a phosphate salt or polyphosphate, not phosphoric acid or polyphosphoric acid.
- Heading 2804Elemental phosphorus
It is the element, not an oxide or acid of phosphorus.
- Heading 2853Phosphides
These are phosphorus compounds with metals or other elements, not phosphoric acids.
- Heading 2919Phosphoric acid esters
These are organic esters and are classified outside the inorganic acid heading.
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.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.
All lines in heading 2809
- 2809.10.00.00Diphosphorus pentaoxideFree
- 2809.20.00.10Containing less than 65 percent available diphosphorus pentaoxide (P2O5) equivalentsFree
- 2809.20.00.20Phosphoric acid / Fertilizer grade / OtherFree
- 2809.20.00.30Phosphoric acid and polyphosphoric acids / Phosphoric acid / OtherFree
- 2809.20.00.40Phosphoric acid and polyphosphoric acids / Polyphosphoric acidsFree