Heading 2811: Other inorganic acids and other inorganic oxygen compounds of nonmetals
Every line of heading 2811 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.
Other inorganic acids and other inorganic oxygen compounds of nonmetals
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 |
|---|---|---|
| 2811.11.00.00 | Hydrogen fluoride (Hydrofluoric acid) | Free |
| 2811.12.00.00 | Hydrogen cyanide (hydrocyanic acid) | 4.2% |
| 2811.19 | Other: | |
| 2811.19.10.00 | Arsenic acid | 2.3% |
| 2811.19.30.00 | Hydrobromic acid | Free |
| 2811.19.61 | Other | 4.2% |
| 2811.19.61.10 | Sulfamic acid | |
| 2811.19.61.90 | Other | |
| 2811.21.00.00 | Carbon dioxide | 3.7% |
| 2811.22 | Silicon dioxide: | |
| 2811.22.10.00 | Synthetic silica gel | 3.7% |
| 2811.22.50.00 | Other | Free |
| 2811.29 | Other: | |
| 2811.29.10.00 | Arsenic trioxide | Free |
| 2811.29.20.00 | Selenium dioxide | Free |
| 2811.29.30.00 | Sulfur dioxide | 4.2% |
| 2811.29.50.00 | Other | 3.7% |
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2811 has 7 of them. Schedule B lookup →
- 2811.11.0000HYDROGEN FLUORIDE (HYDROFLUORIC ACID)
- 2811.12.0000HYDROGEN CYANIDE
- 2811.19.0002ACIDS, INORGANIC, NESOI
- 2811.21.0000CARBON DIOXIDE
- 2811.22.0000SILICON DIOXIDE
- 2811.29.3000SULFUR DIOXIDE
- 2811.29.9000OTHER INORGANIC OXYGEN COMPOUNDS OF NONMETALS, 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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