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2835.39.10.00

Polyphosphates / Of potassium

Classification path

  1. Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined
  2. Polyphosphates
  3. Other
  4. Of potassium

Rates of duty

General (MFN)
3.1%
Column 2Cuba, North Korea, Russia, Belarus
25%
Unit of quantity
kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 2835

About heading 2835

Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined

Heading 2835 covers phosphinates (hypophosphites), phosphonates (phosphites), phosphates, and polyphosphates, whether or not chemically defined. It is split first between phosphinates/phosphonates and phosphates, then within phosphates by cation and type, and within polyphosphates between sodium triphosphate and other polyphosphates.

Full guide to heading 2835

Products in this heading

  • Sodium tripolyphosphate (STPP)
  • Trisodium phosphate (TSP)
  • Dicalcium phosphate
  • Monosodium phosphate
  • Potassium phosphate
  • Aluminum phosphate
  • Triammonium phosphate
  • Sodium hexametaphosphate

Frequently asked questions

What is the HTS code for sodium tripolyphosphate?

Sodium tripolyphosphate (sodium triphosphate) is classified under 2835.31.00.00. Its general (MFN) rate is 1.4%.

What is the duty on dicalcium phosphate?

Dicalcium phosphate (calcium hydrogenorthophosphate) is classified under 2835.25.00.00. Its general (MFN) rate is Free.

How do I classify potassium phosphate?

A simple phosphate of potassium is classified under 2835.24.00.00, with a general (MFN) rate of 3.1%. A polyphosphate of potassium is classified under 2835.39.10.00, with a general (MFN) rate of 3.1%.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 2835.39.10.00: Polyphosphates / Of potassium, 3.1% duty | HTSBase