Analysis
HTS 2833.22.00 covers other sulfates: of aluminum under heading 2833 (sulfates; alums; peroxosulfates (persulfates)).
Neighbouring lines carry rates from duty-free to 5.5%, so the exact line matters. The widest gap is with 2833.29.30 (other: of vanadium), at 5.5%: a product that belongs there but is entered here, or the reverse, changes the duty by 5.5 percentage points.
Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 29% of the 274 tariff lines in chapter 28. 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 is the industry code a US manufacturer of the same product would normally use.
Goods from countries without normal trade relations pay the column 2 rate of 10% instead of nothing, so origin decides between free entry and a 10% duty.
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 |
|---|---|---|
| 2833.11.10 | Disodium sulfate: salt cake | Free |
| 2833.11.50 | Disodium sulfate: other | 0.4% |
| 2833.19.00 | Sodium sulfates: other | Free |
| 2833.21.00 | Other sulfates: of magnesium | 3.7% |
| 2833.24.00 | Other sulfates: of nickel | 3.2% |
| 2833.25.00 | Other sulfates: of copper | 1.4% |
| 2833.27.00 | Other sulfates: of barium | 0.6% |
| 2833.29.10 | Other: of cobalt | 1.4% |
| 2833.29.20 | Other: of iron | Free |
| 2833.29.30 | Other: of vanadium | 5.5% |
| 2833.29.40 | Other: of chromium | 3.7% |
| 2833.29.45 | Other: of zinc | 1.6% |
| 2833.29.51 | Other: other | 3.7% |
| 2833.30.00 | Sulfates; alums; peroxosulfates (persulfates): alums | 1.6% |
| 2833.40.20 | Peroxosulfates (persulfates): of sodium | 3.7% |
| 2833.40.60 | Peroxosulfates (persulfates): other | 3.1% |