Analysis
HTS 2831.10.10 covers sodium formaldehyde sulfoxylate under heading 2831 (dithionites and sulfoxylates).
Neighbouring lines carry rates from 5.5% to 5.5%, so the exact line matters. The widest gap is with 2831.90.00 (dithionites and sulfoxylates: other), at 5.5%: a product that belongs there but is entered here, or the reverse, changes the duty by 5.5 percentage points.
Goods from countries without normal trade relations pay the column 2 rate of 35% instead of nothing, so origin decides between free entry and a 35% duty.
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.
The other lines in the same group are 2831.10.50 (of sodium: other, 5.5%) and 2831.90.00 (dithionites and sulfoxylates: other, 5.5%).
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.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2831.10.50 | Of sodium: other | 5.5% |
| 2831.90.00 | Dithionites and sulfoxylates: other | 5.5% |