Analysis
HTS 2811.11.00 covers hydrogen fluoride (Hydrofluoric acid) under heading 2811 (other inorganic acids and other inorganic oxygen compounds of nonmetals).
Within this group the rate runs from duty-free to 4.2%. Compared with 2811.29.30 (other: sulfur dioxide), which pays 4.2%, a misclassification either way moves the duty by 4.2 percentage points.
The normal trade relations rate here is zero, shared by about 29% of the 274 tariff lines in chapter 28, a useful check when a neighbouring dutiable line is a candidate. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
Census statistics map these goods to NAICS 325180 (Other Basic Inorganic Chemical Manufacturing), an industry of 705 US establishments employing 41,447 people. That concordance is how imports of this line are compared with US output.
Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2811.12.00 | Hydrogen cyanide (hydrocyanic acid) | 4.2% |
| 2811.19.10 | Other: arsenic acid | 2.3% |
| 2811.19.30 | Other: hydrobromic acid | Free |
| 2811.19.61 | Other: other | 4.2% |
| 2811.21.00 | Other inorganic oxygen compounds of nonmetals: carbon dioxide | 3.7% |
| 2811.22.10 | Synthetic silica gel | 3.7% |
| 2811.22.50 | Silicon dioxide: other | Free |
| 2811.29.10 | Other: arsenic trioxide | Free |
| 2811.29.20 | Other: selenium dioxide | Free |
| 2811.29.30 | Other: sulfur dioxide | 4.2% |
| 2811.29.50 | Other: other | 3.7% |