Loading...
HSChapter 39
U.S. imports of polystyrene (non-expandable) in primary forms, nesoi (HS 390319) totaled $6.7M in April 2026, traded with 24 countries.
Last updated: April 2026 dataNon-expandable polystyrene in primary forms — general-purpose (GPPS) and high-impact (HIPS) grades — is a foundational resin for injection-molded consumer goods, disposable foodservice items, electronics housings, and medical device components. The entire heading resolves to a single 10-digit line (3903190000), so the principal classification issue is distinguishing non-expandable grades from EPS (heading 390311) and from acrylonitrile-butadiene-styrene (ABS) copolymers classified elsewhere. Mexico and Taiwan lead US imports under this heading, with Canada and Japan also significant. Importers sourcing from China should note that Chinese-origin polystyrene may be subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
HIPS is a rubber-toughened polystyrene in which polybutadiene is dispersed as a separate phase within a polystyrene matrix — it is still classified as a polystyrene under heading 390319. ABS, by contrast, is a true terpolymer of acrylonitrile, butadiene, and styrene and is classified under heading 3903 as an acrylonitrile-butadiene-styrene copolymer. The distinction affects both the applicable duty rate and any trade-remedy exposure, so importers should obtain a polymer composition certificate confirming the resin type.
A manufacturer's certificate of analysis confirming the absence of an incorporated blowing agent, along with the resin's bulk density and bead or pellet morphology, is the most effective supporting document. CBP may also accept a technical data sheet from the resin producer. Importers should retain these records for at least five years in case of a post-entry audit.
Monthly import values over time
Supplier Network
Get discovered by U.S. importers searching for HS 390319 — Polystyrene (Non-Expandable) in Primary Forms, NESOI. Be the first supplier listed.