U.S. imports of Potassium Sulfate Fertilizers (SITC 56232) totaled $13.4M in August 2026, imported from 23 countries.
Importers of Potassium Sulfate Fertilizers 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 Fertilizers imports of $13.4M in August 2026 ran 108% above the year-to-date monthly average of $6.4M.
Last updated: August 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.
75 import shipments a month
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.
Basic heading 224 of 465 in section 5
Basic heading 56232 · $13.4M of $27.5B
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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 Fertilizers and exported $30.7M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Belgium and Germany together supply 85% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.