U.S. exports of Diphosphorus Pentaoxide (Phosphorus Pentoxide) (HS 280910) totaled $359K in August 2026.
Importers of Diphosphorus Pentaoxide (Phosphorus Pentoxide) paid $40K in duties in August 2026, an average duty rate of 17.51% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Diphosphorus Pentaoxide (Phosphorus Pentoxide) imports of $226K in August 2026 ran 66% below the year-to-date monthly average of $657K.
Last updated: August 2026 dataDiphosphorus pentaoxide (P₂O₅), also known as phosphorus pentoxide or phosphoric anhydride, is a powerful desiccant and dehydrating agent used in specialty chemical synthesis, optical fiber manufacturing, and semiconductor processing. India and China are the leading suppliers to the US market, with France representing a European source for higher-purity grades. Classified under a single line (2809100000), the product's extreme hygroscopicity demands specialized moisture-proof packaging and handling protocols that importers must verify comply with DOT hazardous-materials requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
5 import shipments a month
Diphosphorus pentaoxide (2809100000) is the anhydrous oxide form of phosphorus, while phosphoric acid and polyphosphoric acids are classified under the adjacent heading 280920. The distinction matters because P₂O₅ is the dehydrated precursor — it reacts violently with water to form phosphoric acid — and the two products serve different industrial functions and carry separate tariff treatment.
Phosphorus pentoxide is classified as a DOT hazardous material (corrosive solid, water-reactive) and must be shipped in hermetically sealed, moisture-proof containers meeting UN specification standards. Shipping documents must include proper hazmat declarations, and importers should confirm that foreign packaging certifications are accepted under US DOT regulations before shipment.
Subheading 2 of 2 in heading 2809
Subheading 280910 · $359K of $30.3M
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ImportsExports
Imports
$226KYoY · free account
Exports
$359KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $7.3M of Diphosphorus Pentaoxide (Phosphorus Pentoxide) and exported $1.3M.
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 · exports 11 of 12 months reported. 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 | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2809100000 | Diphosphorus Pentaoxide | $226K | 17.51% | 100.00% | $40K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2809100000 | Diphosphorus Pentaoxide | $359K |
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 · August 2026
destination
Mexico and Brazil together take 100% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 17.51% of imports for consumption.