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HSChapter 39
U.S. imports of urea resins & thiourea resins, primary forms (HS 390910) totaled $4.2M in April 2026, traded with 19 countries.
Importers of Urea Resins & Thiourea Resins, Primary Forms paid $308K in duties in April 2026 — an effective duty rate of 17% on $1.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataUrea-formaldehyde and thiourea-formaldehyde resins are the dominant binders in wood-based panel manufacturing — particleboard, MDF, and plywood — and also serve as molding compounds and paper-treatment agents. All US imports under this heading are classified under a single 10-digit line (3909100000), with no further tariff subdivision. Germany leads supply, followed by Canada and Mexico, a pattern consistent with integrated North American forest-products supply chains and European chemical exports.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
While customs classification under 3909100000 does not itself trigger an admissibility review, downstream products made with urea-formaldehyde resins — such as composite wood panels — must comply with EPA TSCA Title VI formaldehyde emission standards. Importers of the resin itself should be aware that their customers' finished goods may face these requirements, which can influence purchasing specifications.
Urea resins (3909.10) are formed from urea or thiourea reacted with formaldehyde, while melamine resins (3909.20) use melamine as the amino compound. Melamine resins offer superior moisture and heat resistance, commanding a price premium. If a product is a urea-melamine copolymer, classification depends on which component predominates, and a customs broker should be consulted.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3909100000 | UREA RESINS,THIOUREA RESINS | $4.2M | 17.29% | $308K |
UREA RESINS,THIOUREA RESINS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3909100000 | UREA RESINS,THIOUREA RESINS | $4.5M |
UREA RESINS,THIOUREA RESINS
3.5M kg
ARTICLES OF PLASTICS, NESOI
HS 392690
FLOOR, WALL, ETC COVERS, VINYL CHLORIDE POLYMERS
HS 391810
TABLEWARE AND KITCHENWARE OF PLASTICS
HS 392410
SACKS & BAGS (INCL CONES) OF POLYMERS OF ETHYLENE
HS 392321
HOUSEHOLD AND TOILET ARTICLES NESOI OF PLASTICS
HS 392490
PLATES, SHEETS ETC, NON-CELL ETC, POLYMER
HS 392010
| State | Imports | Exports | Balance |
|---|---|---|---|
| Michigan | -- | $2.3M | +$2.3M |
| Iowa | $1.1M | -- | -$1.1M |
| Pennsylvania | $365K | $546K | +$181K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAULT STE MARIE, MI | -- | $2.3M | +$2.3M |
| PORT HURON, MI | $1.0M | $156K | -$876K |
| LAREDO, TX | $440K | $157K | -$283K |