Analysis
HTS 2811.22.50 covers silicon dioxide: other under heading 2811 (other inorganic acids and other inorganic oxygen compounds of nonmetals).
Rates on the nearby lines range from duty-free to 4.2%. The costliest confusion would be with 2811.29.30 (other: sulfur dioxide) at 4.2%, a difference of 4.2 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 29% of the 274 tariff lines in chapter 28 that are also free. 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, the industry a domestic producer of these goods reports under.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2811.11.00 | Hydrogen fluoride (Hydrofluoric acid) | Free |
| 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% |
| 2811.29.10 | 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% |