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U.S. imports of acrylonitrile-butadiene-styrene (abs) copolymers in primary forms (HS 390330) totaled $43.6M in July 2026, traded with 28 countries.
Importers of Acrylonitrile-Butadiene-Styrene (ABS) Copolymers in Primary Forms paid $2.9M in duties in July 2026 — an effective duty rate of 12% on $23.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Acrylonitrile-Butadiene-Styrene (ABS) Copolymers in Primary Forms imports of $43.6M in July 2026 ran 36% above the year-to-date monthly average of $32.0M.
Last updated: July 2026 dataABS is one of the most widely traded engineering thermoplastics globally, valued for its balance of impact resistance, rigidity, and surface finish quality — properties that make it indispensable in automotive interiors, consumer electronics housings, and pipe fittings. The entire heading resolves to a single US tariff line (3903300000) in primary forms. South Korea leads US import supply, followed by Mexico and Taiwan, reflecting the concentration of large-scale ABS production capacity in East Asia and North America. Importers should monitor Section 301 exposure for shipments originating from certain origins and verify origin documentation carefully given the multi-country supplier base.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
625 shipments/mo
ABS copolymers classified under 3903300000 have been subject to Section 301 tariffs when originating from China. Importers should confirm the current status and applicable list with a licensed customs broker, as Section 301 actions and exclusions are subject to ongoing review and modification.
The key distinction is the presence of butadiene rubber in ABS, which provides impact toughness absent in SAN. Customs classification hinges on the polymer's chemical composition: ABS (heading 3903.30) contains all three monomers — acrylonitrile, butadiene, and styrene — while SAN (heading 3903.20) contains only styrene and acrylonitrile. Supplier technical data sheets confirming monomer composition are the primary classification support document.
HSChapter 39
Subheading 1 of 5 in heading 3903
Subheading 390330 · $43.6M of $109.9M
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ImportsExports
Imports
$43.6MYoY · Pro
Exports
$22.5MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3903300000 | Acrylonitrile-Butadiene-Styrene (Abs) Copolymers | $43.6M | 6.67% | 53.58% | $2.9M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3903300000 | Acrylonitrile-Butadiene-Styrene (Abs) Copolymers | $22.5M |
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 · July 2026
origin
Mexico and Korea, South together supply 78% of it.
customs district
destination
entry
rate provision · imports
46.4% enters free of duty; the effective duty rate is 6.67%.