U.S. imports of 2,4,6-Tripropyl-1,3,5,2,4,6-Trioxatriphosphinane 2,4,6-Trioxide (HS 293146) totaled $230K in August 2026, imported from 1 country.
Importers of 2,4,6-Tripropyl-1,3,5,2,4,6-Trioxatriphosphinane 2,4,6-Trioxide paid $9K in duties in August 2026, an average duty rate of 4.00% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. 2,4,6-Tripropyl-1,3,5,2,4,6-Trioxatriphosphinane 2,4,6-Trioxide imports of $230K in August 2026 ran 254% above the year-to-date monthly average of $65K.
Last updated: August 2026 data2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide is a cyclic organophosphorus triester used as a flame retardant and plasticizer intermediate in specialty polymer applications. Its dedicated HS subheading (293146) reflects the broader effort to enumerate specific organophosphorus compounds with potential dual-use relevance. Germany is the leading recorded US supplier, classified under HTS line 2931460000. The compound's phosphonate ester structure places it within a chemical family that warrants careful end-use documentation at US entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3 import shipments a month
The compound functions as a reactive or additive flame retardant and plasticizer in polyurethane, epoxy, and other polymer systems, where its cyclic phosphonate structure contributes both phosphorus content for fire suppression and flexibility-enhancing properties.
Its classification under the organophosphorus derivatives heading warrants a review against current CWC Schedule lists and BIS Export Administration Regulations before import. Importers should confirm the compound's specific regulatory status with compliance counsel, as the CWC's scope can extend to structurally related phosphonate esters.
Subheading 5 of 17 in heading 2931
Subheading 293146 · $230K of $107.2M
ImportsExports
Imports
$230KYoY · free account
Exports
—YoY · free account
Low of 4 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $574K of 2,4,6-Tripropyl-1,3,5,2,4,6-Trioxatriphosphinane 2,4,6-Trioxide.
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 4 of 12 months reported, exports 1 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 |
|---|---|---|---|---|---|
| 2931460000 | Org-Phos Drtvs:2,4,6-Tripropyl-1,3,5,2,4,6-Triox.. | $230K | 4.00% | 100.00% | $9K |
Imports · August 2026
origin
customs district
destination
entry
rate provision · imports
duty collected equals 4.00% of imports for consumption.
Trade Directory
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