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HSChapter 31
U.S. imports of diammonium phosphate (dap) (HS 310530) totaled $15.2M in April 2026, traded with 10 countries.
Diammonium Phosphate (DAP) imports of $15.2M in April 2026 ran 84% below the year-to-date monthly average of $94.2M.
Last updated: April 2026 dataDiammonium hydrogenorthophosphate — universally known in the trade as DAP — is one of the world's most widely applied nitrogen-phosphorus fertilizers, prized for its high nutrient density and ease of handling. Saudi Arabia leads US imports under 3105300000, driven by Ma'aden's large-scale integrated phosphate complex, with Mexico and Australia as secondary sources. DAP pricing is closely watched as a global commodity benchmark, and supply disruptions at major producing facilities can rapidly affect US spot markets.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
DAP (diammonium phosphate) has a higher nitrogen-to-phosphate ratio than MAP (monoammonium phosphate) and a higher pH, making it better suited to acidic soils. For HTS purposes, DAP classifies under 310530 while MAP falls under 310540 — the chemical distinction between the diammonium and monoammonium salt forms is the classification trigger.
Saudi Arabia's Ma'aden phosphate complex benefits from integrated access to low-cost phosphate rock, ammonia, and sulfur, enabling highly competitive production economics. This cost structure, combined with large export-oriented capacity, makes Saudi Arabia a structurally significant supplier to the US market.
Supplier Network
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| JORDAN | $12.4M | -- | -$12.4M |
| THAILAND | -- | $6.5M | +$6.5M |
| DOMINICAN REPUBLIC | -- | $5.0M | +$5.0M |
| CANADA | $1.0M | $3.8M | +$2.8M |
| VENEZUELA | -- | $3.7M | +$3.7M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % |
|---|---|---|---|
| 3105300000 | DIAMMONIUM HYDROGENORTHOPHOSPHATE (DAP) | $15.2M | -- |
DIAMMONIUM HYDROGENORTHOPHOSPHATE (DAP)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3105300000 | DIAMMONIUM HYDROGENORTHOPHOSPHATE (DAP) | $27.3M |
DIAMMONIUM HYDROGENORTHOPHOSPHATE (DAP)
123.3K t
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $12.4M | $9.8M | -$2.6M |
| TAMPA, FL | -- | $16.1M | +$16.1M |
| DETROIT, MI | -- | $1.2M | +$1.2M |