HTS 31022100 — Ammonium sulfate
This page details 31022100: “Ammonium sulfate”. It belongs to heading 3102 in Chapter 31, where duty-free general treatment applies. No special-program overrides are listed for this line.
Tariff rates for 31022100
| Rate type | Rate | Notes |
|---|---|---|
| General (Column 1) | Free | Applies to countries without a preferential agreement (specific or compound basis). |
| Special | — | Reduced or free rates for designated program countries (see code legend on the USITC site). |
| Column 2 | Free | Statutory rate applied to the few economies without normal-trade-relations status. |
Reporting units
Entry summaries for 31022100 must be declared in: t (t = metric tons). A single quantitative measure accompanies the ad valorem component on the entry summary.
Frequently asked questions
Does 31022100 qualify for a free or reduced rate?
No preferential-program overrides are listed for this line in the schedule extract above; some programs may still apply, so verify against the USITC special-rate legend before claiming preference.
Where can I verify the official rate for 31022100?
The figures on this page are reproduced from the USITC Harmonized Tariff Schedule export dated October 9, 2026. Always verify against the live USITC tool linked at the foot of this page before filing your entry summary.
What is the duty rate for HTS 31022100?
31022100 carries a Column 1 general rate of Free. The full official line, including special program rates and the Column 2 statutory rate, is reproduced above from the USITC schedule.
Related pages & tools
Data as of October 9, 2026 · Source: USITC Harmonized Tariff Schedule (line 3102.21.00.00). Rates are informational and not a binding customs ruling.