Heading 3903: Polymers of styrene, in primary forms
Every line of heading 3903 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Polymers of styrene, in primary forms
Chapter 39: Plastics and articles thereof. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 3903.11.00.00 | Expandable | 6.5% |
| 3903.19.00.00 | Other | 6.5% |
| 3903.20.00.00 | Styrene-acrylonitrile (SAN) copolymers | 6.5% |
| 3903.30.00.00 | Acrylonitrile-butadiene-styrene (ABS) copolymers | 6.5% |
| 3903.90 | Other: | |
| 3903.90.10.00 | Methyl methacrylate-butadiene-styrene (MBS) copolymers | 6.5% |
| 3903.90.50.00 | Other | 6.5% |
Public records · unclaimed listings
U.S. manufacturers in this industry, from public records
These companies are not Fromerica members and did not write these listings: Fromerica created them from public government records and has not verified what the records say. You cannot contact them from here. Open a listing to see what the record says.
- Bomar Specialties, LLC
- Foster, LLC
- LINGOL CORPORATION
- MARLBOROUGH PLASTICS, INC.
- SUMITOMO BAKELITE NORTH AMERICA, INC.
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And 1 more in the public records. See all →
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 3903 has 5 of them. Schedule B lookup →
- 3903.11.0000POLYSTYRENE,EXPANDABLE
- 3903.19.0000POLYSTYRENE,NESOI
- 3903.20.0000STYRENE-ACRYLONITRILE (SAN) COPOLYMERS
- 3903.30.0000ACRYLONITRILE-BUTADIENE-STYRENE (ABS) COPOLYMERS
- 3903.90.0000POLYMERS OF STYRENE, IN PRIMARY FORMS, NESOI
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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