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SITCSection 5
U.S. imports of potassium sulfate fertilizers (SITC 56232) totaled $11.6M in April 2026, traded with 19 countries.
Potassium Sulfate Fertilizers imports of $11.6M in April 2026 ran 61% above the year-to-date monthly average of $7.2M.
Last updated: April 2026 dataPotassium sulfate (SOP) is a chloride-free potassic fertilizer prized in specialty crop production — particularly for chloride-sensitive crops such as tobacco, citrus, and potatoes — where muriate of potash would damage yield quality. Its sulfur content provides a secondary nutrient benefit, making it a dual-function input for sulfur-deficient soils. Import volumes under this SITC heading are tracked separately from other potassic fertilizers, reflecting SOP's distinct agronomic positioning and premium pricing relative to standard potash products.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Potassium sulfate (SOP) and muriate of potash (MOP/potassium chloride) are classified under separate SITC headings because of their distinct chemical compositions. SOP contains sulfate rather than chloride as the anion, which matters both agronomically and for customs classification — importers should ensure the correct heading is declared to avoid misclassification.
Antidumping and countervailing duty orders have historically been applied to certain potassic fertilizer products from specific origins. Importers should verify current Commerce Department and USITC orders for the applicable HTS subheadings before contracting, as duty exposure can change with administrative reviews.
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Monthly import values over time