Harmonized System
U.S. exports of Diols (Other Acyclic Dihydric Alcohols) (HS 290539) totaled $23.8M in August 2026.
Importers of Diols (Other Acyclic Dihydric Alcohols) paid $799K in duties in August 2026, an average duty rate of 13.19% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataButylene glycol, neopentyl glycol, hexylene glycol, and other acyclic diols not separately enumerated are widely used as polyester polyol building blocks, coatings intermediates, and personal care humectants. Taiwan leads US supply under this heading, followed by Germany and South Korea — a supplier mix that reflects both Asian polymer-chemical export strength and European specialty production. The heading's five 10-digit lines (including 2905391000 for butylene glycol, 2905392000 for neopentyl glycol, and 2905396000 for hexylene glycol) require careful matching of the imported compound to the correct enumerated line before defaulting to the basket provision at 2905399000. Neopentyl glycol in particular is a key raw material for alkyd and polyester resins used in coatings, and supply concentration in Asia warrants attention to lead times.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
155 import shipments a month
No. 1,4-Butanediol (BDO) is a distinct chemical with its own classification and is not enumerated under 290539. Butylene glycol at 2905391000 covers the 1,3-isomer commonly used in cosmetics and personal care. Importers must confirm the specific isomer with the supplier's certificate of analysis, as 1,4-BDO is also subject to DEA regulatory controls as a List I chemical precursor, adding a compliance dimension entirely absent for the 1,3-isomer.
Neopentyl glycol production is concentrated among a relatively small number of large Asian and European producers. Capacity outages, feedstock (formaldehyde and isobutyraldehyde) price swings, and shipping disruptions can cause significant price volatility. Buyers relying on neopentyl glycol for coatings or resin production should consider maintaining safety stock and qualifying multiple-origin suppliers to reduce concentration risk.
ImportsExports
Imports
$6.1MYoY · free account
Exports
$23.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $64.8M of Diols (Other Acyclic Dihydric Alcohols) and exported $294.7M.
Through August 2026. Source: U.S. Census Bureau.
Subheading 5 of 20 in heading 2905
Subheading 290539 · $23.8M of $456.3M
Trade Directory
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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 |
|---|---|---|---|---|---|
| 2905399000 | Other Dihydric Alcohols (Diols) | $4.0M | 12.06% | 92.88% | $485K |
| 2905391000 | Butylene Glycol | $1.1M | 6.69% | 100.00% | $70K |
| 2905396000 | Hexylene Glycol | $839K | 26.61% | 100.00% | $223K |
| 2905392000 | Neopentyl Glycol | $145K | 13.99% | 100.00% | $20K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2905390000 | Acyclic Dihydric Alcohols, NESOI | $23.8M |
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.
Exports · August 2026
destination
Belgium and China together take 41% of it.
customs district
origin
entry
rate provision · imports
4.7% enters free of duty; duty collected equals 13.19% of imports for consumption.