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HSChapter 39
U.S. imports of ion-exchange resins based on plastics, in primary forms (HS 391400) totaled $28.6M in June 2026, traded with 34 countries.
Importers of Ion-Exchange Resins Based on Plastics, in Primary Forms paid $2.6M in duties in June 2026 — an effective duty rate of 10% on $25.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: June 2026 dataPolymer-based ion-exchange resins are critical separation and purification materials used in water treatment, pharmaceutical manufacturing, food processing, and chemical refining. The US tariff schedule distinguishes cholestyramine resin USP (3914002000) — a pharmaceutical-grade bile acid sequestrant — from all other polymer-based ion exchangers (3914006000), reflecting the drug-substance status of the former. Sweden and Germany are among the leading suppliers, consistent with European dominance in specialty resin manufacturing. Cholestyramine resin USP entries are subject to FDA review as a drug substance, and importers should ensure the foreign manufacturer holds appropriate FDA registration and that shipments are accompanied by certificates of analysis meeting USP specifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Cholestyramine resin USP (3914002000) is a pharmaceutical active ingredient used to lower cholesterol, and its USP designation signals drug-substance status. CBP and FDA treat it differently from industrial ion-exchange resins: it requires FDA admissibility review, and the manufacturing facility must be registered with FDA. Other ion-exchange resins used in water softening, chemical processing, or food purification fall under 3914006000 and do not carry the same drug-substance compliance burden.
Ion-exchange resins originating from China may be subject to Section 301 tariffs depending on the specific product and applicable exclusions. Importers sourcing from China should verify current Section 301 applicability for their specific resin type and consult a licensed customs broker to confirm the correct duty treatment at time of entry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $6.8M | $4.8M | -$2.0M |
| CANADA | $1.8M | $6.0M | +$4.1M |
| SWEDEN | $5.2M | $425K | -$4.7M |
| NETHERLANDS | $1K | $5.2M | +$5.2M |
| UNITED KINGDOM | $4.4M | $468K | -$4.0M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3914006000 | ION-EXCHANGRS BASED ON POLYMRS OF 3901-3913, NESOI | $28.4M | 9.24% | 89.94% | $2.6M |
| 3914002000 | (CHOLESTYRAMINE RESIN USP) | $161K | 0.19% | 100.00% | $300 |
ION-EXCHANGRS BASED ON POLYMRS OF 3901-3913, NESOI
(CHOLESTYRAMINE RESIN USP)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3914006000 | ION-EXCHANGRS BASED ON POLYMRS OF 3901-3913, NESOI | $23.7M |
| 3914002000 | (CHOLESTYRAMINE RESIN USP) | $264K |
ION-EXCHANGRS BASED ON POLYMRS OF 3901-3913, NESOI
1.4M kg
(CHOLESTYRAMINE RESIN USP)
50.9K kg
ARTICLES OF PLASTICS, NESOI
HS 392690
TABLEWARE AND KITCHENWARE OF PLASTICS
HS 392410
FLOOR, WALL, ETC COVERS, VINYL CHLORIDE POLYMERS
HS 391810
HOUSEHOLD AND TOILET ARTICLES NESOI OF PLASTICS
HS 392490
SACKS & BAGS (INCL CONES) OF POLYMERS OF ETHYLENE
HS 392321
ETHYLENE-ALPHA-OLEFIN COPOLY, SPC GRAVITY <0.94
HS 390140
| State | Imports | Exports | Balance |
|---|---|---|---|
| Massachusetts | $925K | $8.4M | +$7.5M |
| Pennsylvania | $4.9M | $3.0M | -$1.9M |
| California | $6.0M | $652K | -$5.4M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $11.8M | $443K | -$11.4M |
| BUFFALO-NIAGARA FALLS, NY | -- | $4.4M | +$4.4M |
| LOS ANGELES, CA | $3.6M | $399K | -$3.2M |