Subheading 8 of 9 in heading 2920
Triethyl phosphite is a trialkyl phosphite ester used as a ligand in catalysis, a flame-retardant intermediate, and a building block in organophosphorus chemistry, classified under tariff line 2920240000. India and China are the dominant US suppliers. Section 301 tariffs may apply to Chinese-origin shipments, and TSCA import certification is a standard compliance step for this industrial chemical.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
While both are trialkyl phosphites, triethyl phosphite's larger ethyl groups give it different reactivity and solubility characteristics. It is more commonly used as a ligand in transition-metal catalysis and in Michaelis-Arbuzov reactions for pharmaceutical intermediates, whereas trimethyl phosphite is more prevalent in flame-retardant synthesis. This distinction can affect which supplier specifications are acceptable for a given manufacturing process.
With India and China as the two dominant suppliers, US importers face meaningful geographic concentration risk. Any disruption — whether from export controls, logistics bottlenecks, or Section 301 tariff changes affecting Chinese-origin goods — can tighten availability. Maintaining dual-source qualification with both Indian and Chinese producers is a common risk-mitigation strategy.
ImportsExports
Imports
—YoY · free account
Exports
—YoY · free account
Low of 6 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $759K of Triethyl 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 6 of 12 months reported, exports 0 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 |
|---|---|---|---|---|
| 2920240000 | Triethyl Phosphite | — | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2920240000 | Triethyl Phosphite | $30K |
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.
Imports · August 2026
origin
customs district
destination
entry
rate provision · imports
None recorded for this period.
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