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Code 3911 90 · Heading 3911

Polysulfides, polysulfones and other chemically synthesized polymers and prepolymers, not elsewhere specified, in unprocessed form

This covers polysulfides, polysulfones and other polymers or prepolymers made by chemical synthesis that are not elsewhere specified and are in unprocessed form.

For example

  • Chemically synthesized polysulfide polymer in unprocessed form
  • Chemically synthesized polysulfone polymer in unprocessed form
See the official tariff text

Official tariff text

Polysulphides, polysulphones and other polymers and prepolymers produced by chemical synthesis, n.e.s., in primary forms

How we got to this code

  1. VII
  2. 39
  3. 3911
  4. 3911 90
Show the steps

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0–6.5%

5 codes below this one

This is the catch-all under 3911: it covers what the sibling codes below do not.

This is the remainder for chemically synthesized polysulfides, polysulfones and other polymers or prepolymers in unprocessed form that are not the petroleum, coumarone, indene, coumarone-indene, polyterpene or specifically named poly(1,3-phenylene methylphosphonate) products listed in the neighbouring groups.

Compare the sibling codes

See all 3 codes at this level

Classification decides the rate here: from 0.0% to 6.5%.

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

  • Their lines2 Norwegian lines

39.11.9010 Condensation, polycondensation and polyaddition products

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines27 British lines

3911 90 11 10

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

  • Their lines8 US lines
  • Entry dateSept. 17, 2026

3911.90.10.00 Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 2 Norwegian lines

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

  • 39.11.9010

    Condensation, polycondensation and polyaddition products

    Ordinary duty
    Duty free

  • 39.11.9090

    Other

    Ordinary duty
    Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 27 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

  • 3911 90 11 10

    Poly(oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1,4-phenylene) (CAS RN 25135-51-7 and CAS RN 25154-01-2), in one of the forms mentioned in note 6(b) to this chapter containing by weight not more than 20 % of additives

    Ordinary duty
    Duty free

  • 3911 90 11 90

    Other

    Ordinary duty
    Duty free

  • 3911 90 13 00

    Poly(thio-1,4-phenylene)

    Ordinary duty
    Duty free

  • 3911 90 19 15

    Polyetherimide of - 5,5′-[(isopropylidene)bis(4,1-phenylene)dioxy]bis(1,3-isobenzofurandione) and 1,3-benzenediamine whether or not as a copolymer with 3-aminopropyl terminated dimethylsilicones (CAS RN 61128-46-9 or 99904-16-2), or - 5,5′-[(isopropylidene)bis(4,1-phenylene)dioxy]bis(1,3-isobenzofurandione) and 1,4-benzenediamine (CAS RN 61128-47-0), or - 4,4′-[(isopropylidene)bis(4,1-phenylene)dioxy]bis(1,3-isobenzofurandione), 5,5′-[(isopropylidene)bis(4,1-phenylene)dioxy]bis(1,3-isobenzofurandione), 4,5′-[(isopropylidene)bis(4,1-phenylene)dioxy]bis(1,3-isobenzofurandione), pyromellitic dianhydride, 1,2-benzenediamine, 1,3-benzenediamine and 1,4-benzenediamine with phthalic anhydride endcaps (CAS RN 96557-46-9)

    Ordinary duty
    Duty free

  • 3911 90 19 25

    Polyamideimide of -4-Chloroformylphthalic anhydride and 4,4′-methylenedianiline (CAS RN 35463-82-2), or -4-Chloroformyphthalic anhydride, 4,4′-oxydianiline and 1,3-phenylenediamine (CAS RN 25928-85-2), containing by weight not more than 35 % of additives

    Ordinary duty
    Duty free

  • 3911 90 19 30

    Copolymer of ethyleneimine and ethyleneimine dithiocarbamate, in an aqueous solution of sodium hydroxide

    Ordinary duty
    Duty free

  • 3911 90 19 35

    Poly(oxy-1,4-phenylenesulfonyl-1,4-phenyleneoxy-4,4’-biphenylene) (CAS RNs 25608-64-4 and 25839-81-0) containing by weight not more than 20 % of additives

    Ordinary duty
    Duty free

  • 3911 90 19 40

    m- Xylene formaldehyde resin

    Ordinary duty
    Duty free
Show all 27 lines

  • 3911 90 19 80

    Poly(oxy-1,4-phenylenesulfonyl-1,4-phenylene) (CAS RN 25608-63-3 and CAS RN 25667-42-9) containing by weight not more than 20 % of additives

    Ordinary duty
    Duty free

  • 3911 90 19 90

    Other

    Ordinary duty
    Depends on the product details
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3911 90 92 00

    Copolymer of p-cresol and divinylbenzene, in the form of a solution in N,N-dimethylacetamide containing by weight 50 % or more of polymer; hydrogenated copolymers of vinyltoluene and α-methylstyrene

    Ordinary duty
    Duty free

  • 3911 90 99 10

    For cavity filling, for use in certain types of aircraft

    Ordinary duty
    Duty free

  • 3911 90 99 23

    Aqueous solution consisting of by weight 25 % or more, but not more than 40 % of a poly(isobutylene-maleic anhydride) modified with: -N,N-dimethylpropane-1,3-diamine, -a copolymer of ethylene oxide and propylene oxide, having aminopropyl and methoxy end-groups, -ethanol (CAS RN 497926-97-3)

    Ordinary duty
    Duty free

  • 3911 90 99 25

    Copolymer of vinyltoluene and α-methylstyrene

    Ordinary duty
    Duty free

  • 3911 90 99 35

    Alternated copolymer of ethylene and maleic anhydride (EMA)

    Ordinary duty
    Duty free

  • 3911 90 99 38

    Mixture containing by weight: -90 % (± 1 %) of 1,4:5,8- Dimethanonaphthalene, 2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro-,polymer with 3a,4,7,7a- tetrahydro- 4,7-methano-1H-indene, hydrogenated (CAS RN 881025-72-5), and -10 % (± 1 %) of a hydrogenated styrene butadiene copolymer (CAS RN 66070-58-4)

    Ordinary duty
    Duty free

  • 3911 90 99 40

    Mixed calcium and sodium salt of a copolymer of maleic acid and methyl vinyl ether, having a calcium content of 9 % or more but not more than 16 % by weight

    Ordinary duty
    Duty free

  • 3911 90 99 43

    Copolymer of α-methylstyrene and styrene, having a softening point of more than 113 ºC

    Ordinary duty
    Duty free

  • 3911 90 99 45

    Copolymer of maleic acid and methyl vinyl ether

    Ordinary duty
    Duty free

  • 3911 90 99 48

    Mixture containing by weight: -90 % (± 1 %) of 1,4:5,8- Dimethanonaphthalene, 2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro-,polymer with 3a,4,7,7a- tetrahydro- 4,7-methano-1H-indene, hydrogenated (CAS RN 881025-72-5), and -10 % (± 1 %) of an ethylene-propylene copolymer (CAS RN 9010-79-1)

    Ordinary duty
    Duty free

  • 3911 90 99 60

    Copolymer of styrene with maleic anhydride, either partially esterified or completely chemically modified, in flake or powder form

    Ordinary duty
    Duty free

  • 3911 90 99 63

    Mixture, containing by weight: - 20% or more but not more than 40% of a copolymer of methyl vinyl ether and monobutyl maleate (CAS RN 25119-68-0), - 7% or more but not more than 20% of a copolymer of methyl vinyl ether and monoethyl maleate (CAS RN 25087-06-3), - 40% or more, but not more than 65% of ethanol (CAS RN 64-17-5), - 1% or more but not more than 7% of butan-1-ol (CAS RN 71-36-3)

    Ordinary duty
    Duty free

  • 3911 90 99 65

    Calcium zinc salt of a copolymer of maleic acid and methyl vinyl ether

    Ordinary duty
    Duty free

  • 3911 90 99 70

    Aqueous solution containing by weight: - 30 % or more but not more than 40 % of poly-4-vinylpyridine-N-oxide, - 0,1 % or more but not more than 4 % of isonicotinic acid-N-oxide, - 0,1 % or more but not more than 3,5 % of sodium sulphate, - 0,1 % or more but not more than 2 % of 4-acetylpyridine-N-oxide

    Ordinary duty
    Duty free

  • 3911 90 99 73

    A mixture containing by weight: -89 % or more but not more than 91 % of 1,4:5,8-dimethanonaphthalene, 2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro-, polymer with 3a,4,7,7a-tetrahydro-4,7-methano-1H-indene, hydrogenated (CAS RN 881025-72-5), and -9 % or more but not more than 11 % of polypropylene homopolymer (CAS RN 9003-07-0)

    Ordinary duty
    Duty free

  • 3911 90 99 86

    Copolymer of methyl vinyl ether and maleic acid anhydride (CAS RN 9011-16-9)

    Ordinary duty
    Duty free

  • 3911 90 99 90

    Other

    Ordinary duty
    Depends on the product details
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 8 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

  • 3911.90.10.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Elastomeric

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.15.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Containing monomer units which are aromatic or modified aromatic, or which are obtained, derived or manufactured in whole or in part therefrom, Thermoplastic, Poly(nitrilomethanetetraarylnitrilo- [2,4,6-tris-(1-methyethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)- phenyl]-ω-[[[2,6-bis(1-methylethyl)- phenyl]amino]methylene]amino carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methyl- ethyl) homopolymer with polyethylene

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.25.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Containing monomer units which are aromatic or modified aromatic, or which are obtained, derived or manufactured in whole or in part therefrom, Thermoplastic, Other

    General rate
    6.1%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.35.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Containing monomer units which are aromatic or modified aromatic, or which are obtained, derived or manufactured in whole or in part therefrom, Thermosetting, 1,1'-Bis(methylenedi-4,1-phenylene)- 1H-pyrrole-2,5-dione, copolymer with 4,4'-methylenebis(benzeneamine); and Hydrocarbon novolac cyanate ester

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.45.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Containing monomer units which are aromatic or modified aromatic, or which are obtained, derived or manufactured in whole or in part therefrom, Thermosetting, Other

    General rate
    5.8%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.70.00

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Chlorinated synthetic rubber

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.91.10

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Thermoplastic

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 3911.90.91.50

    Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms, Other, Thermosetting

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.