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U.S. imports of trimethylolpropane (tmp) (HS 290541) totaled $3.0M in July 2026, traded with 8 countries.
Importers of Trimethylolpropane (TMP) paid $401K in duties in July 2026 — an effective duty rate of 14% on $2.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Trimethylolpropane (TMP) imports of $3.0M in July 2026 ran 17% above the year-to-date monthly average of $2.6M.
Last updated: July 2026 dataCommercially known as trimethylolpropane (TMP), 2-ethyl-2-(hydroxymethyl)propane-1,3-diol is a trifunctional alcohol that serves as a crosslinker and polyol building block in alkyd resins, polyurethane coatings, and synthetic lubricants. Sweden and Germany are the leading US suppliers, reflecting the dominance of a small number of European integrated chemical producers in global TMP capacity. China is also a notable source, and importers sourcing from there should be aware of potential Section 301 tariff exposure. TMP's single 10-digit line (2905410000) simplifies classification, but purity grade and particle size (flake versus molten) can affect handling logistics and end-use performance.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
91 shipments/mo
TMP is commercially available as white crystalline flakes or as a molten liquid shipped in heated ISO tanks. Both forms classify identically to 2905410000 — physical form does not change the HTS classification. However, molten shipments require specialized heated container equipment and may face additional port-handling requirements, so logistics planning should account for the form specified in the purchase contract.
TMP production requires formaldehyde and n-butyraldehyde as feedstocks and is capital-intensive, limiting the number of viable global producers. Sweden and Germany host two of the largest integrated producers. This concentration means that a single plant outage can tighten global supply quickly. US importers should monitor producer maintenance schedules and consider forward purchasing or dual-sourcing strategies to manage availability risk.
HSChapter 29
Subheading 14 of 20 in heading 2905
Subheading 290541 · $3.0M of $145.5M
Supplier Network
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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 |
|---|---|---|---|---|---|
| 2905410000 | 2-Ethyl-2-(Hydroxymethyl)Propane-1,3-Diol | $3.0M | 13.38% | 95.91% | $401K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2905410000 | 2-Ethyl-2-(Hydroxymethyl)Propane-1,3-Diol | $425K |
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
$3.0MYoY · Pro
Exports
$425KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Germany and Sweden together supply 91% of it.
customs district
destination
entry
rate provision · imports
4.1% enters free of duty; the effective duty rate is 13.38%.