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Harmonized System
U.S. imports of diethyl phosphite (HS 292022) totaled $240K in July 2026, traded with 3 countries.
Importers of Diethyl Phosphite paid $33K in duties in July 2026 — an effective duty rate of 14% on $240K in dutiable value, based on actual customs collections rather than the published tariff schedule. Diethyl Phosphite imports of $240K in July 2026 ran 147% above the year-to-date monthly average of $97K.
Last updated: July 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.
3 shipments/mo
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.
HSChapter 29
Subheading 5 of 9 in heading 2920
Subheading 292022 · $240K of $43.3M
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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 | Duty Collected |
|---|---|---|---|---|---|
| 2920220000 | Diethyl Phosphite | $240K | 13.70% | 100.00% | $33K |
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 | $73K |
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
$240KYoY · Pro
Exports
$73KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
India and Germany together supply 100% of it.
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destination
entry
rate provision · imports
the effective duty rate is 13.70%.