U.S. imports of Superphosphates — Other (NESOI) (HS 310319) totaled $31K in August 2026, imported from 5 countries.
Last updated: August 2026 dataSuperphosphates with a phosphorus pentoxide content below 35% — principally single superphosphate (SSP) and ordinary superphosphate — are classified under 3103190000 as the residual superphosphate category. China and Mexico are the leading US suppliers, with Spain, Canada, and Egypt also contributing to import volumes. SSP's lower P₂O₅ concentration is offset by its sulfur content (from the sulfuric acid acidulation process), making it attractive for sulfur-deficient soils and as a cost-effective phosphate source in certain blended fertilizer formulations. Importers sourcing from China should verify whether any antidumping or countervailing duty orders apply to the specific product.
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6 import shipments a month
Importers should check with CBP and the International Trade Commission for any active antidumping or countervailing duty orders covering superphosphate or phosphate fertilizer products from China before placing orders. Trade-remedy coverage in the fertilizer sector has expanded in recent years, and a pre-import scope review can prevent unexpected duty liability.
SSP contains significant sulfur (typically 11–12%) as a co-nutrient from the sulfuric acid manufacturing process, making it a dual-nutrient product for sulfur-deficient soils. Its lower cost per ton compared with TSP also makes it attractive for bulk blending operations where the blend ratio can compensate for the lower P₂O₅ content.
Subheading 3 of 3 in heading 3103
Subheading 310319 · $31K of $59.6M
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 |
|---|---|---|---|---|---|
| 3103190000 | Superphosphates Other | $31K | 11.72% | 46.86% | $4K |
ImportsExports
Imports
$31KYoY · free account
Exports
—YoY · free account
Low of 11 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $414K of Superphosphates — Other (NESOI) and exported $6.2M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 11 of 12 months reported, exports 9 of 12 months reported. Source: U.S. Census Bureau.
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Imports · August 2026
origin
Mexico and China together supply 100% of it. China pays 25.0% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
53.1% enters free of duty; duty collected equals 11.72% of imports for consumption.