U.S. exports of Potassic Fertilizers, NESOI (HS 310490) totaled $11.2M in August 2026.
Importers of Potassic Fertilizers, NESOI paid $4K in duties in August 2026, an average duty rate of 0.69% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Potassic Fertilizers, NESOI imports of $578K in August 2026 ran 83% below the year-to-date monthly average of $3.3M.
Last updated: August 2026 dataPotassic fertilizers not elsewhere specified — including potassium magnesium sulfate (langbeinite/K-Mag) and other specialty potassic compounds that don't qualify as potassium chloride or potassium sulfate — enter under a single tariff line, 3104900100. The United Kingdom and Canada are the leading suppliers, with Israel and the Netherlands also contributing meaningfully. Specialty potassic products in this heading often serve niche agronomic applications where secondary nutrient content (magnesium, sulfur) is as commercially important as the potassium itself.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
32 import shipments a month
Heading 310490 is a residual category for potassic fertilizers that are neither potassium chloride (310420) nor potassium sulfate (310430). Products like potassium magnesium sulfate (langbeinite) or potassium nitrate used as fertilizer typically fall here when they don't meet the specific chemical definitions of the named headings.
CBP may request a certificate of analysis confirming the chemical composition, particularly the K₂O equivalent and any secondary nutrients. Clear documentation helps avoid reclassification disputes and supports accurate duty calculation, especially for blended or multi-nutrient products that could potentially fall under Chapter 31's compound fertilizer headings instead.
Subheading 2 of 3 in heading 3104
Subheading 310490 · $11.2M of $92.9M
ImportsExports
Imports
$578KYoY · free account
Exports
$11.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $39.9M of Potassic Fertilizers, NESOI and exported $114.9M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and Colombia together take 68% of it.
customs district
origin
entry
rate provision · imports
94.5% enters free of duty; duty collected equals 0.69% of imports for consumption.
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 |
|---|---|---|---|---|---|
| 3104900100 | Mineral or Chemical Fertilizer, Potassic, NESOI | $578K | 0.69% | 5.48% | $4K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3104900100 | Mineral or Chemical Fertilizer, Potassic, NESOI | $11.2M |
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.
Trade Directory
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