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HSChapter 31
U.S. imports of ammonium sulfate fertilizer (HS 310221) totaled $35.3M in April 2026, traded with 11 countries.
Last updated: April 2026 dataAmmonium sulfate (21-0-0-24S) is a widely traded nitrogen-sulfur fertilizer valued in agricultural markets where sulfur deficiency limits crop yields, particularly for canola, corn, and small grains. Classified under a single 10-digit line (3102210000), it enters the US primarily from Canada, Belgium, and the Netherlands, with Russia and South Korea also among the leading suppliers. Much of the global supply is a byproduct of caprolactam or coke-oven operations, so production economics differ markedly from purpose-built nitrogen fertilizers. Importers should note that Russian-origin product may be subject to additional trade-remedy measures.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Ammonium sulfate is classified specifically under HTS 3102210000 as a straight nitrogen fertilizer containing sulfate. It is distinguished from double salts or mixtures of ammonium sulfate (heading 310229) and from urea or ammonium nitrate products. The sulfur content is a key agronomic and classification marker.
Importers should verify current antidumping and countervailing duty orders, as ammonium sulfate from certain origins has been subject to trade-remedy proceedings. Russian-origin product may also face additional measures. A licensed customs broker can confirm the applicable orders at time of entry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| BELGIUM | $23.4M | $217K | -$23.2M |
| CANADA | $11.5M | $2.0M | -$9.5M |
| HONDURAS | -- | $1.9M | +$1.9M |
| DOMINICAN REPUBLIC | $2K | $1.3M | +$1.3M |
| JAMAICA | -- | $977K | +$977K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % |
|---|---|---|---|
| 3102210000 | AMMONIUM SULFATE | $35.3M | 0.00% |
AMMONIUM SULFATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3102210000 | AMMONIUM SULFATE | $6.6M |
AMMONIUM SULFATE
19.4K t
UREA, WHETHER OR NOT IN AQUEOUS SOLUTION
HS 310210
POTASSIUM CHLORIDE
HS 310420
MIXTURES OF UREA AND AMMONIUM NITRATE IN SOLUTION
HS 310280
AMMONIUM DIHYDROGENORTHOPHOSPHATE
HS 310540
SUPERPHOSPHATES CONT 35% OR MORE P2O5
HS 310311
AMMONIUM NITRATE, WHETHER/NOT IN AQUEOUS SOLUTION
HS 310230
| State | Imports | Exports | Balance |
|---|---|---|---|
| Louisiana | $20.0M | -- | -$20.0M |
| Virginia | -- | $4.8M | +$4.8M |
| North Dakota | $3.2M | $12K | -$3.1M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| GRAMERCY, LA | $20.0M | -- | -$20.0M |
| PEMBINA, ND | $4.4M | $146K | -$4.2M |
| RICHMOND-PETERSBURG, VA | -- | $4.2M | +$4.2M |