U.S. exports of Diammonium Phosphate (DAP) (HS 310530) totaled $90.9M in August 2026.
Importers of Diammonium Phosphate (DAP) paid $56K in duties in August 2026, an average duty rate of 0.24% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Diammonium Phosphate (DAP) imports of $23.3M in August 2026 ran 56% below the year-to-date monthly average of $52.5M.
Last updated: August 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.
79 import shipments a month
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.
ImportsExports
Imports
$23.3MYoY · free account
Exports
$90.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $441.3M of Diammonium Phosphate (DAP) and exported $573.5M.
Through August 2026. Source: U.S. Census Bureau.
Subheading 2 of 8 in heading 3105
Subheading 310530 · $90.9M of $313.9M
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 |
|---|---|---|---|---|---|
| 3105300000 | Diammonium Hydrogenorthophosphate (Dap) | $23.3M | 0.24% | 2.48% | $56K |
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) | $90.9M |
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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Exports · August 2026
destination
India and Honduras together take 96% of it.
customs district
origin
entry
rate provision · imports
97.5% enters free of duty; duty collected equals 0.24% of imports for consumption.