U.S. imports of Potassium Sulfate (Sulfate of Potash) (HS 310430) totaled $13.4M in August 2026, imported from 23 countries.
Importers of Potassium Sulfate (Sulfate of Potash) paid $3K in duties in August 2026, an average duty rate of 0.03% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Potassium Sulfate (Sulfate of Potash) imports of $13.4M in August 2026 ran 108% above the year-to-date monthly average of $6.4M.
Last updated: August 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.
75 import shipments a month
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.
Subheading 2 of 3 in heading 3104
Subheading 310430 · $13.4M of $262.8M
Trade Directory
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ImportsExports
Imports
$13.4MYoY · free account
Exports
$2.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $91.7M of Potassium Sulfate (Sulfate of Potash) and exported $30.7M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3104300000 | Potassium Sulfate | $13.4M | 0.03% | 0.17% | $3K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3104300000 | Potassium Sulfate | $2.5M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
Belgium and Germany together supply 85% of it.
customs district
entry
rate provision · imports
99.8% enters free of duty; duty collected equals 0.03% of imports for consumption.