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HSChapter 31
U.S. exports of diammonium phosphate (dap) (HS 310530) totaled $86.6M in July 2026.
Diammonium Phosphate (DAP) imports of $1.8M in July 2026 ran 97% below the year-to-date monthly average of $56.6M.
Last updated: July 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.
37 shipments/mo
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.
Subheading 4 of 8 in heading 3105
Subheading 310530 · $1.8M of $75.9M
ImportsExports
Imports
$1.8MYoY · Pro
Exports
$86.6MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
India and New Zealand together take 93% of it.
customs district
origin
entry
rate provision · imports
100.0% enters free of duty; the effective duty rate is 0.00%.
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 |
|---|---|---|---|---|
| 3105300000 | Diammonium Hydrogenorthophosphate (Dap) | $1.8M | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3105300000 | Diammonium Hydrogenorthophosphate (Dap) | $86.6M |
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.
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