HTS tariff line · chapter 31
3102.29.00
Ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nitrate: other
Analysis
HTS 3102.29.00 covers ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nitrate: other under heading 3102 (mineral or chemical fertilizers, nitrogenous).
Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 100% of the 24 tariff lines in chapter 31. Duty-free at the general rate does not rule out additional duties under Chapter 99, such as Section 301 or Section 232 measures, which depend on the country of origin.
Census statistics map these goods to NAICS 325311 (Nitrogenous Fertilizer Manufacturing), an industry of 194 US establishments employing 7,033 people. That is the industry code a US manufacturer of the same product would normally use.
All 8 neighbouring lines carry the same duty-free rate, so a borderline choice between them changes the statistics reported, not the duty paid.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 3102.10.00 | Urea, whether or not in aqueous solution | Free |
| 3102.21.00 | Ammonium sulfate; double salts and mixtures of ammonium sulfate and ammonium nitrate: ammonium sulfate | Free |
| 3102.30.00 | Ammonium nitrate, whether or not in aqueous solution | Free |
| 3102.40.00 | Mixtures of ammonium nitrate with calcium carbonate or other inorganic nonfertilizing substances | Free |
| 3102.50.00 | Mineral or chemical fertilizers, nitrogenous: sodium nitrate | Free |
| 3102.60.00 | Double salts and mixtures of calcium nitrate and ammonium nitrate | Free |
| 3102.80.00 | Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution | Free |
| 3102.90.01 | Mineral or chemical fertilizers, nitrogenous: other, including mixtures not specified in the foregoing subheadings | Free |