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HSChapter 31
U.S. imports of potassium sulfate (sulfate of potash) (HS 310430) totaled $11.6M in April 2026, traded with 19 countries.
Potassium Sulfate (Sulfate of Potash) imports of $11.6M in April 2026 ran 61% above the year-to-date monthly average of $7.2M.
Last updated: April 2026 dataSold commercially as sulfate of potash (SOP), potassium sulfate is the preferred potassic fertilizer for chloride-sensitive crops such as tobacco, fruits, and vegetables, commanding a significant price premium over muriate of potash. All US imports enter under a single 10-digit line, 3104300000. Germany leads supply, reflecting its Kali & Salz mining operations, with Canada and Belgium as secondary sources. Because SOP is also used in specialty chemical and pharmaceutical applications, buyers should confirm the intended end-use grade when sourcing.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Use 310430 when the product is potassium sulfate (K₂SO₄). If the potassic compound is potassium chloride (KCl), it belongs under 310420. Blended or mixed potassic fertilizers not meeting either specific definition may fall under the NESOI heading 310490.
As of the most recent publicly available information, potassium sulfate under 310430 has not been subject to active antidumping or countervailing duty orders in the US, but trade-remedy landscapes change. Importers should check the USITC and Commerce Department databases for any pending investigations before finalizing sourcing decisions.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3104300000 | POTASSIUM SULFATE | $11.6M | 10.00% | $1K |
POTASSIUM SULFATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3104300000 | POTASSIUM SULFATE | $2.2M |
POTASSIUM SULFATE
2.7K t
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $5.0M | $103K | -$4.9M |
| Virginia | $4.0M | -- | -$4.0M |
| Utah | -- | $1.7M | +$1.7M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| STOCKTON, CA | $4.4M | -- | -$4.4M |
| TAMPA, FL | $4.0M | -- | -$4.0M |
| EL PASO, TX | -- | $1.3M | +$1.3M |