Chapter 39 · Plastics and articles thereof · Section 7
HS Code 3903.90
Other
Heading 3903: Polymers of styrene, in primary forms
US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources
United States - HTS lines under 3903.90
Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.
| HTS code | Description | General | Special | Other | Unit |
|---|---|---|---|---|---|
| 3903.90.10 | Methyl methacrylate-butadiene-styrene (MBS) copolymers | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 67.5% | kg |
| 3903.90.50 | Other | 6.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 46% | kg |
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Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.
European Union - CN codes under 3903.90
Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.
| CN code | Description | |
|---|---|---|
| 3903 90 90 | Other | EU duty (TARIC) → |
| 3903 90 10 | Copolymer, solely of styrene with allyl alcohol, of an acetyl value of 175 or more | EU duty (TARIC) → |
| 3903 90 20 | Brominated polystyrene, containing by weight 58 % or more but not more than 71 % of bromine, in one of the forms mentioned in note 6(b) to this chapter | EU duty (TARIC) → |
| 3903 90 00 | Other | EU duty (TARIC) → |
United Kingdom - commodity codes under 3903.90
Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.
| Commodity code | Description | |
|---|---|---|
| 3903 90 00 00 | Other | UK duty & VAT → |
| 3903 90 10 00 | Copolymer, solely of styrene with allyl alcohol, of an acetyl value of 175 or more | UK duty & VAT → |
| 3903 90 20 00 | Brominated polystyrene, containing by weight 58 % or more but not more than 71 % of bromine, in one of the forms mentioned in note 6(b) to this chapter | UK duty & VAT → |
| 3903 90 90 00 | Other | UK duty & VAT → |
| 3903 90 90 20 | Copolymer in the form of granules containing by weight:<br> <br><br><br>- 83 ± 3 % styrene,<br> <br><br><br>- 7 ± 2 % n-butyl acrylate,<br> <br><br><br>- 9 ± 2 % n-butyl methacrylate and<br> <br><br><br>- 0,01 % or more but not more than 1 % of polyolefinic wax<br> | UK duty & VAT → |
| 3903 90 90 35 | Copolymer of _α_-methylstyrene and styrene, having a softening point exceeding 113 ºC | UK duty & VAT → |
| 3903 90 90 38 | Polytetrafluoroethylene (CAS RN 9002-84-0) encapsulated with an acrylonitrile-styrene copolymer (CAS RN 9003-54-7), with a content by weight of each polymer of 50 % (± 1 %) | UK duty & VAT → |
| 3903 90 90 43 | Mixture of polymers consisting by weight of: -10 % or more but not more than 30 % of a styrene-ethylene-butylene-styrene block copolymer (CAS RN 66070-58-4), -25 % or more but not more than 45 % of mineral oil (CAS RN 8042-47-5), -25 % or more but not more than 45 % of calcium carbonate (CAS RN 1317-65-3), -10 % or more but not more than 20 % of polypropylene (CAS RN 9003-07-0), and -1 % or more but not more than 3 % of a copolymer of α-methylstyrene and vinyltoluene (CAS RN 9017-27-0) | UK duty & VAT → |
| 3903 90 90 60 | Copolymer of styrene with maleic anhydride, either partially esterified or completely chemically modified, in flake or powder form | UK duty & VAT → |
| 3903 90 90 70 | Copolymer in the form of granules containing by weight:<br> <br><br><br>- 75 % (± 7 %) styrene and<br> <br><br><br>- 25 % (± 7 %) methylmethacrylate<br> | UK duty & VAT → |
| 3903 90 90 86 | Mixture containing by weight: - 45% or more but not more than 65% of polymers of styrene, - 30% or more but not more than 45% of poly(phenylene ether), and - not more than 11% of additives | UK duty & VAT → |
| 3903 90 90 90 | Other | UK duty & VAT → |
Other subheadings in 3903
Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.