HSChapter 39

Polystyrene (Non-Expandable) in Primary Forms, NESOI

Name: Polystyrene (Non-Expandable) in Primary Forms, NESOI (HS 390319) -- U.S. Import Data
Creator: U.S. Census Bureau
License: https://www.census.gov/about/policies/open-gov/open-data.html

$6.7MU.S. imports · April 2026HS 390319

USTS

Sign in

HSChapter 39

Polystyrene (Non-Expandable) in Primary Forms, NESOI

$6.7MU.S. imports · April 2026HS 390319

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 data

Non-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.

Trade tools

HS Code Lookup Trade Balance Calculator All Tools

Frequently Asked Questions

How is high-impact polystyrene (HIPS) classified relative to ABS copolymers, and why does the distinction matter?

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.

What documentation best supports the classification of non-expandable polystyrene versus EPS at the border?

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.

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 data

Non-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.

Imports: $6.7M; from 24 countries
Exports: $21.3M
Trade balance: Surplus of $14.6M; net exporter

YTD $20.5M (April 2026) · 228 shipments/mo

Top trading partners

View all 24

Country	Imports	Exports	Balance
MEXICO	$1.6M	$9.7M	+$8.1M
CANADA	$737K	$7.1M	+$6.4M
MALAYSIA	$87K	$1.4M	+$1.3M
CHINA	$1.1M	$273K	-$849K
SINGAPORE	$824K	$201K	-$624K

MEXICO

Imports$1.6M

Exports$9.7M

Balance+$8.1M

CANADA

Imports$737K

Exports$7.1M

Balance+$6.4M

MALAYSIA

Imports$87K

Exports$1.4M

Balance+$1.3M

CHINA

Imports$1.1M

Exports$273K

Balance-$849K

SINGAPORE

Imports$824K

Exports$201K

Balance-$624K

Import Trend (12 months)

Monthly import values over time

Suppliers

Supplier Network

Are you a supplier of this product?

Get discovered by U.S. importers searching for HS 390319 — Polystyrene (Non-Expandable) in Primary Forms, NESOI. Be the first supplier listed.

Trade tools

HS Code Lookup Trade Balance Calculator All Tools

Frequently Asked Questions

How is high-impact polystyrene (HIPS) classified relative to ABS copolymers, and why does the distinction matter?

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.

What documentation best supports the classification of non-expandable polystyrene versus EPS at the border?

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.

Imports: $6.7M; from 24 countries
Exports: $21.3M
Trade balance: Surplus of $14.6M; net exporter

YTD $20.5M (April 2026) · 228 shipments/mo