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HSChapter 31
U.S. exports of superphosphates — other (nesoi) (HS 310319) totaled $967K in July 2026, traded with 5 countries.
Last updated: July 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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
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.
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Subheading 2 of 3 in heading 3103
Subheading 310319 · $0 of $40.3M
ImportsExports
Imports
$0YoY · Pro
Exports
$967KYoY · Pro
12-mo low · imports
YoY · ProThrough July 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 | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 3103190000 | Superphosphates Other | $0 | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3103190000 | Superphosphates Other | $967K |
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.
Exports · July 2026
destination
Colombia and Dominican Republic together take 100% of it.
customs district
origin
entry
rate provision · imports
None recorded for this period.