Analysis
HTS 2834.21.00 covers nitrates: of potassium under heading 2834 (nitrites; nitrates).
Neighbouring lines carry rates from duty-free to 5.5%, so the exact line matters. The widest gap is with 2834.29.05 (other: of bismuth), 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.
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 |
|---|---|---|
| 2834.10.10 | Nitrites: of sodium | 5.5% |
| 2834.10.50 | Nitrites: other | 3.1% |
| 2834.29.05 | Other: of bismuth | 5.5% |
| 2834.29.10 | Other: of calcium | Free |
| 2834.29.20 | Other: of strontium | 4.2% |
| 2834.29.51 | Other: other | 3.5% |