U.S. imports of Epoxides, Epoxyalcohols, Epoxyphenols & Epoxyethers with a Three-Membered Ring (Other) (HS 291090) totaled $6.9M in August 2026, imported from 23 countries.
Importers of Epoxides, Epoxyalcohols, Epoxyphenols & Epoxyethers with a Three-Membered Ring (Other) paid $844K in duties in August 2026, an average duty rate of 13.73% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataChina is the primary US import source for this residual epoxide heading, which captures three-membered ring epoxide compounds not classified elsewhere — including butylene oxide (2910901000), aromatic epoxides (2910902000), and other non-aromatic variants (2910909100). These intermediates serve diverse roles as reactive diluents in epoxy formulations, chemical synthesis building blocks, and specialty polymer precursors. Correct classification between the aromatic and non-aromatic subheadings, and between butylene oxide and the NESOI basket, is essential because duty treatment and Section 301 exposure can differ across the four lines.
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92 import shipments a month
The distinction turns on whether the compound contains an aromatic ring system in its molecular structure. Aromatic epoxides classify under 2910902000, while non-aromatic variants fall under 2910909100 or 2910901000 for butylene oxide specifically. A chemical structure analysis or supplier's technical data sheet, reviewed with a licensed customs broker, is the recommended approach.
Yes — butylene oxide has its own dedicated 10-digit line (2910901000) rather than falling into the NESOI basket. Importers should confirm the specific isomer and purity of their product, as misclassification into the NESOI line could result in incorrect duty assessment or Section 301 exposure differences.
ImportsExports
Imports
$6.9MYoY · free account
Exports
$2.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $83.7M of Epoxides, Epoxyalcohols, Epoxyphenols & Epoxyethers with a Three-Membered Ring (Other) and exported $21.3M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 291090 — Epoxides, Epoxyalcohols, Epoxyphenols & Epoxyethers with a Three-Membered Ring (Other), so the companies trading it can find you. Be the first supplier listed.
Subheading 2 of 6 in heading 2910
Subheading 291090 · $6.9M of $21.8M
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 |
|---|---|---|---|---|---|
| 2910909100 | Other Non-Aromatic Epoxides, Etc With A 3-Mem Ring | $5.4M | 11.91% | 92.97% | $647K |
| 2910902000 | Aromatic Epoxides, Etc With A Three-Membered Rnetc | $626K | 30.09% | 100.00% | $188K |
| 2910901000 | Butylene Oxide | $79K | 10.00% | 100.00% | $8K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2910900005 | Epoxides, Epoxyalchls Etc W/3-Member Rng Etc NESOI | $2.2M |
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
Japan and China together supply 45% of it. China pays 42.7% duty; Italy 10.0%.
customs district
entry
rate provision · imports
5.5% enters free of duty; duty collected equals 13.73% of imports for consumption.