U.S. imports of Trimethylolpropane (TMP) (HS 290541) totaled $5.9M in August 2026, imported from 8 countries.
Importers of Trimethylolpropane (TMP) paid $704K in duties in August 2026, an average duty rate of 12.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Trimethylolpropane (TMP) imports of $5.9M in August 2026 ran 98% above the year-to-date monthly average of $3.0M.
Last updated: August 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.
163 import shipments a month
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.
Subheading 9 of 20 in heading 2905
Subheading 290541 · $5.9M of $149.6M
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 |
|---|---|---|---|---|---|
| 2905410000 | 2-Ethyl-2-(Hydroxymethyl)Propane-1,3-Diol | $5.9M | 12.01% | 97.29% | $704K |
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 | $165K |
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.
Trade Directory
List your company under HS 290541 — Trimethylolpropane (TMP), so the companies trading it can find you. Be the first supplier listed.
ImportsExports
Imports
$5.9MYoY · free account
Exports
$165KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $34.4M of Trimethylolpropane (TMP) and exported $4.2M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Sweden and Germany together supply 90% of it. China pays 41.2% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
2.7% enters free of duty; duty collected equals 12.01% of imports for consumption.