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 v4.0.1633 · updated 2026-10-21 · sources
Rates on this page are the official published schedule rates, shown for information. This is not a customs ruling: preference programs, Section 232/301 surcharges and per-shipment fees can change what you actually pay.
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 → |
Nearby codes in heading 3903
The subheadings immediately before and after 3903.90 in chapter 39.
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.
Frequently asked questions
Common questions about HS code 3903.90.
What is HS code 3903.90?
HS code 3903.90 covers: Other. It belongs to chapter 39 (Plastics and articles thereof) of the Harmonized System.
What is the US import duty for HS code 3903.90?
The US general (normal trade relations) rates under this subheading range: 6.5%. Preference programs and Section 232/301 surcharges can change the effective rate; see the HTS lines for detail.
What is the UK commodity code for 3903.90?
The UK extends 3903.90 to 12 declarable 10-digit commodity codes, starting with 3903900000. The full code goes on the UK customs declaration.