Heading 2835: Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates…
Every line of heading 2835 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.
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, 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 |
|---|---|---|
| 2835.10.00.00 | Phosphinates (hypophosphites) and phosphonates (phosphites) | 3.1% |
| 2835.22.00.00 | Of mono- or disodium | 1.4% |
| 2835.24.00.00 | Of potassium | 3.1% |
| 2835.25.00.00 | Calcium hydrogenorthophosphate ("Dicalcium phosphate") | Free |
| 2835.26.00.00 | Other phosphates of calcium | Free |
| 2835.29 | Other: | |
| 2835.29.10.00 | Of aluminum | Free |
| 2835.29.20.00 | Of triammonium | 1.5% |
| 2835.29.30.00 | Of trisodium | 2.2% |
| 2835.29.51.00 | Other | 4.1% |
| 2835.31.00.00 | Sodium triphosphate (Sodium tripolyphosphate) | 1.4% |
| 2835.39 | Other: | |
| 2835.39.10.00 | Of potassium | 3.1% |
| 2835.39.50.00 | Other | 3.7% |
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2835 has 10 of them. Schedule B lookup →
- 2835.10.0000PHOSPHINATES (HYPOPHOSPHITES) AND PHOSPHONATES (PHOSPHITES)
- 2835.22.0000MONO- OR DISODIUM PHOSPHATES
- 2835.24.0000POTASSIUM PHOSPHATE
- 2835.25.0000CALCIUM HYDROGENORTHOPHOSPHATE ( DICALCIUM PHOSPHATE )
- 2835.26.0000OTHER PHOSPHATES OF CALCIUM, EXC CALCIUM HYDROGENORTHOPHOSPHATE ( DICALCIUM PHOSPHATE ), NESOI
- 2835.29.2000TRIAMMONIUM PHOSPHATES
- 2835.29.3000TRISODIUM PHOSPHATE
- 2835.29.9050PHOSPHATES, NESOI (EXCLUDING TRIAMMONIUM & TRISODIUM)
- 2835.31.0000SODIUM TRIPHOSPHATES (SODIUM TRIPOLYPHOSPHATE)
- 2835.39.0000POLYPHOSPHATES, NESOI
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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