U.S. exports of Diethyl Phosphite (HS 292022) totaled $29K in August 2026, exported to 3 countries.
Last updated: August 2026 dataDiethyl phosphite (DEP) serves as a key building block in organophosphorus chemistry, with applications spanning pesticide synthesis, lubricant additives, and pharmaceutical intermediates. India is the leading US supplier, followed by China and Germany — a concentration in Asian sources that creates Section 301 exposure for Chinese-origin shipments. All US imports enter under tariff line 2920220000, and buyers should verify certificate-of-analysis specifications against contract purity requirements, as grade variations affect downstream reaction yields.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The two compounds are classified at separate HS6 headings — dimethyl phosphite under 292021 and diethyl phosphite under 292022 — based on the alkyl group attached to the phosphorus ester. The distinction matters because they are distinct chemical entities with different CAS numbers, and misclassification can trigger penalties.
Commercial diethyl phosphite is traded in technical and high-purity pharmaceutical grades. Buyers should specify minimum purity thresholds (commonly 98–99%+) in purchase contracts, as lower-grade material may contain diethyl phosphonate impurities that affect synthesis performance and may require additional customs documentation for certain end uses.
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Subheading 5 of 9 in heading 2920
Subheading 292022 · $29K of $13.4M
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 |
|---|---|---|---|---|
| 2920220000 | Diethyl Phosphite | — | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2920220000 | Diethyl Phosphite | $29K |
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.
ImportsExports
Imports
—YoY · free account
Exports
$29KYoY · free account
Low of 7 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $830K of Diethyl Phosphite.
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 · imports 7 of 12 months reported, exports 5 of 12 months reported. Source: U.S. Census Bureau.
Exports · August 2026
destination
customs district
origin
entry
rate provision · imports
None recorded for this period.