Subheading · Chapter 39 · Heading 3907

3907.91

3907.91: Polyacetals, other polyethers and epoxide resins: other polyesters, unsaturated

Unsaturated polyester resins

Official description Unsaturated

3907.91 is the HS subheading for unsaturated polyester resins, under heading 3907 in chapter 39.

What you pay

Importing into UK

Customs duty Free – 6% standard rate · across 3 national lines depends on the country of origin
Additional duties and charges 3 additional measures Import requirements: 4
VAT 20.00 % import VAT
Duty calculatorCalculate duty and taxes →

Rates by national line · UK Global Tariff

UK lines →
  1. 3907 91 00 00 Unsaturated
  2. 3907 91 10 00 Liquid 6%
  3. 3907 91 90 00 Other Free
  4. 3907 91 90 10 Diallyl phthalate prepolymer, in powder form Free
  5. 3907 91 90 90 Other Free

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Additional duties and charges 3

  • Additional dutyAdditional duties 35%
    Applies to goods from
    Belarus, Russia
    Legal act
    2022 No. 833
    Documents
    • 9018
  • Duty suspensionAutonomous suspension under end-use Free
    Applies to goods from
    all countries
    Legal act
    2020 No. 1435
    Documents
    • N990 EUS - Authorisation for the use of end use procedure (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
    Tariff lines
    on 1 of 3 lines
  • Duty suspensionAirworthiness tariff suspension Free
    Applies to goods from
    all countries
    Legal act
    S.I. 2018/1249
    Documents
    • C119 Authorised Release Certificate — EASA Form 1 (Appendix I to Annex I to Regulation (EU) No 748/2012), or equivalent certificate

Import requirements 4

  • Prohibition or restrictionImport prohibition
    Applies to goods from
    North Korea
    Legal act
    S.I. 2019/411
    Tariff lines
    on 1 of 3 lines
  • Import controlRestriction on entry into free circulation
    Applies to goods from
    Russia, Ukraine
    Legal act
    2023 No. 440, S.I. 2022/395
    Documents
    • 9011
    • 9022
    • 9038
    • 9009
    • 9010
    • 9017
  • Import controlImport control on restricted goods and technologies
    Applies to goods from
    North Korea
    Legal act
    S.I. 2019/411
    Documents
    • Y920 Goods other than those described in the footnotes linked to the measure
    Tariff lines
    on 1 of 3 lines
  • Import controlImport control - Waste
    Applies to goods from
    all countries
    Legal act
    S.I. 2019/590
    Documents
    • C672 Information document accompanying shipments of waste as mentioned in Regulation (EU) 2024/1157 – Article 18 and Annex VII
    • C669 Notification document as mentioned in Regulation (EU) 2024/1157 - Article 5 and Annex IA
    • Y923 Product not subjected to the provisions of Regulation (EU) 2024/1157
    • C670 Movement document as mentioned in Regulation (EU) 2024/1157 – Article 5 and Annex IB

Preferential rates by country

Agreement or schemeCountriesRate
standard rate (no agreement)—Free – 6%
DCTS Comprehensive
Afghanistan, Angola, Bangladesh, Benin and 38 more

Afghanistan, Angola, Bangladesh, Benin, Bhutan, Burkina Faso, Burundi, Cambodia, Central African Republic, Chad, Comoros, Congo - Kinshasa, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Haiti, Kiribati, Laos, Liberia, Malawi, Mali, Mauritania, Myanmar (Burma), Nepal, Niger, Rwanda, São Tomé & Príncipe, Senegal, Sierra Leone, Somalia, South Sudan, Sudan, Tanzania, Timor-Leste, Togo, Tuvalu, Uganda, Yemen, Zambia

Free
European Union (including code " EU")
Austria, Belgium, Bulgaria, Croatia and 23 more

Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden

Free
DCTS Enhanced
Algeria, Bolivia, Cape Verde, Congo - Brazzaville and 13 more

Algeria, Bolivia, Cape Verde, Congo - Brazzaville, Cook Islands, Kyrgyzstan, Micronesia, Mongolia, Nigeria, Niue, Pakistan, Philippines, Sri Lanka, Syria, Tajikistan, Uzbekistan, Vanuatu

Free
CARIFORUM
Antigua & Barbuda, Bahamas, Barbados, Belize and 10 more

Antigua & Barbuda, Bahamas, Barbados, Belize, Dominica, Dominican Republic, Grenada, Guyana, Jamaica, St Kitts & Nevis, St Lucia, St Vincent & the Grenadines, Suriname, Trinidad & Tobago

Free
OCTs (Overseas Countries and Territories)
Anguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands and 7 more

Anguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Montserrat, Pitcairn Islands, South Georgia & South Sandwich Islands, St Helena, Turks & Caicos Islands

Free
Central America Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama Free
SADC EPA Botswana, Eswatini, Lesotho, Mozambique, Namibia Free
Eastern and Southern Africa States Madagascar, Mauritius, Seychelles, Zimbabwe Free
CPTPP Brunei, Malaysia Free
UK–Andorra agreement Andorra Free
UK–Albania agreement Albania Free
UK–Australia agreement Australia Free
UK–Canada agreement Canada Free
UK–Switzerland agreement Switzerland Free
UK–Côte d’Ivoire agreement Côte d’Ivoire Free
UK–Chile agreement Chile Free
UK–Cameroon agreement Cameroon Free
UK–Colombia agreement Colombia Free
UK–Ceuta & Melilla agreement Ceuta & Melilla Free
UK–Ecuador agreement Ecuador Free
UK–Egypt agreement Egypt Free
UK–Fiji agreement Fiji Free
UK–Faroe Islands agreement Faroe Islands Free
UK–Georgia agreement Georgia Free
UK–Ghana agreement Ghana Free
DCTS Standard Indonesia Free
UK–Israel agreement Israel Free
UK–India agreement India Free
UK–Iceland agreement Iceland Free
UK–Jordan agreement Jordan Free
UK–Japan agreement Japan Free
UK–Kenya agreement Kenya Free
UK–South Korea agreement South Korea Free
UK–Lebanon agreement Lebanon Free
UK–Liechtenstein agreement Liechtenstein Free
UK–Morocco agreement Morocco Free
UK–Moldova agreement Moldova Free
UK–North Macedonia agreement North Macedonia Free
UK–Mexico agreement Mexico Free
UK–Norway agreement Norway Free
UK–New Zealand agreement New Zealand Free
UK–Peru agreement Peru Free
UK–Papua New Guinea agreement Papua New Guinea Free
UK–Palestinian Territories agreement Palestinian Territories Free
UK–Serbia agreement Serbia Free
UK–Solomon Islands agreement Solomon Islands Free
UK–Singapore agreement Singapore Free
UK–San Marino agreement San Marino Free
UK–Tunisia agreement Tunisia Free
UK–Türkiye agreement Türkiye Free
UK–Ukraine agreement Ukraine Free
UK–Vietnam agreement Vietnam Free
UK–Samoa agreement Samoa Free
UK–Kosovo agreement Kosovo Free
UK–South Africa agreement South Africa Free

UK: imports by month

last 12 months£73.6m+6.1% · previous 12 months
Average import price£2.23 per kg
Jan 2024: £6mFeb 2024: £5.5mMar 2024: £5.5mApr 2024: £6.4mMay 2024: £6.5mJun 2024: £7.1mJul 2024: £7.9mAug 2024: £6.9mSept 2024: £5.8mOct 2024: £5.9mNov 2024: £6.2mDec 2024: £4.4mJan 2025: £5.5mFeb 2025: £4.7mMar 2025: £6mApr 2025: £5.9mMay 2025: £6mJun 2025: £5.4mJul 2025: £7.9mAug 2025: £5.6mSept 2025: £5.1mOct 2025: £5.2mNov 2025: £4.5mDec 2025: £4mJan 2026: £5mFeb 2026: £5.8mMar 2026: £6.6mApr 2026: £7.5mMay 2026: £8.6mJun 2026: £8.7mJul 2026: £7.8mAug 2026: £4.8m 202420252026
Data up to August 2026 (provisional) · Monthly data: Eurostat Comext (CC BY 4.0), HMRC (OGL v3.0)

Main suppliers, last 12 months

CountryValueShareChange
France £24m 32.6% +17.3%
Italy £10.7m 14.5% -1.2%
Finland £7.3m 10% -3.9%
Türkiye £5.6m 7.6% +27.2%
Netherlands £5.1m 7% +8.6%
Czechia £5m 6.8% +28.7%
Spain £4.8m 6.5% +15.2%
Germany £3.2m 4.4% -1.6%

Same subheading in other tariffs

World trade in 2024

3907.91 · US$3bn

Trade value (US$) no reported trade < US$3mUS$3m+US$23m+US$77m+> US$262m

Exports: 108
  1. China: US$332m
  2. Italy: US$326m
  3. United States: US$305m
  4. Türkiye: US$262m
  5. France: US$236m
  6. Germany: US$161m
  7. South Korea: US$111m
  8. Taiwan: US$98m
  9. Poland: US$92m
  10. Canada: US$91m
  11. Spain: US$77m
  12. Japan: US$72m
  13. United Kingdom: US$67m
  14. Netherlands: US$65m
  15. Malaysia: US$65m
  16. Finland: US$54m
  17. India: US$49m
  18. Czechia: US$49m
  19. Singapore: US$39m
  20. Slovenia: US$36m
  21. Saudi Arabia: US$34m
  22. United Arab Emirates: US$33m
  23. Belgium: US$32m
  24. Norway: US$26m
  25. Sweden: US$25m
  26. Switzerland: US$23m
  27. Colombia: US$21m
  28. Brazil: US$20m
  29. Croatia: US$17m
  30. Mexico: US$15m
  31. Thailand: US$14m
  32. Austria: US$12m
  33. Australia: US$11m
  34. Indonesia: US$8m
  35. Portugal: US$7m
  36. Lithuania: US$6m
  37. Vietnam: US$6m
  38. South Africa: US$6m
  39. Bulgaria: US$5m
  40. Yemen: US$5m
  41. Argentina: US$5m
  42. Serbia: US$5m
  43. Kazakhstan: US$4m
  44. Ireland: US$4m
  45. Slovakia: US$4m
  46. Iran: US$4m
  47. Estonia: US$3m
  48. Hungary: US$3m
  49. Egypt: US$3m
  50. Hong Kong SAR China: US$3m
  51. Denmark: US$3m
  52. Chile: US$3m
  53. Russia: US$3m
  54. Ethiopia: US$2m
  55. Greece: US$2m
  56. New Zealand: US$1m
  57. Sri Lanka: US$883k
  58. Tanzania: US$797k
  59. Tunisia: US$766k
  60. Guatemala: US$560k

Top exporters

RankCountryValueShare
1 China US$332m 11.2%
2 Italy US$326m 11%
3 United States US$305m 10.3%
4 Türkiye US$262m 8.8%
5 France US$236m 7.9%
6 Germany US$161m 5.4%
7 South Korea US$111m 3.7%
8 Taiwan US$98m 3.3%
9 Poland US$92m 3.1%
10 Canada US$91m 3.1%

Top importers

RankCountryValueShare
1 Germany US$245m 8.2%
2 United States US$181m 6.1%
3 Spain US$177m 5.9%
4 Vietnam US$169m 5.7%
5 Canada US$155m 5.2%
6 Mexico US$143m 4.8%
7 Poland US$141m 4.8%
8 India US$119m 4%
9 United Kingdom US$93m 3.1%
10 France US$93m 3.1%

Import duty on this product around the world 164

The most-favoured-nation (MFN) duty each country applies to goods of this HS subheading: the average over its national tariff lines, with the lowest and highest line where they differ. Goods from countries with a trade agreement often pay less.

  • 5%median duty
  • 38number of duty-free countries (MFN)
  • 45%highest: Bahamas, Bermuda, Cayman Islands

164

Importing countryMFN dutylines from – todata year
Afghanistan 5% 2018 · HS 2012
Albania 2% 2023
Algeria 5% 2023
Angola 0% 2023 · HS 2017
Anguilla 10% 2021 · HS 2017
Antigua & Barbuda 5% 2021 · HS 2007
Argentina 14% 2023 · HS 2017
Armenia 4.5% 4% – 5% 2023
Aruba 12% 2021 · HS 2012
Australia 5% 2023
Azerbaijan 0% 2023 · HS 2017
Bahamas 45% 2022
Bahrain 5% 2023
Bangladesh 5% 2023 · HS 2017
Barbados 5% 2022 · HS 2017
Belarus 4.5% 4% – 5% 2021 · HS 2017
Belize 0% 2023
Benin 5% 2023
Bermuda 25% 2023
Bhutan 10% 2022
Bolivia 10% 2023 · HS 2017
Bosnia & Herzegovina 5% 2022
Botswana 10% 2023
Brazil 14% 2023 · HS 2017
Brunei 0% 2023 · HS 2017
Burkina Faso 5% 2023
Burundi 10% 2023
Cambodia 0% 2023 · HS 2017
Cameroon 10% 2023
Canada 0% 2023
Cape Verde 5% 2023 · HS 2017
Cayman Islands 22% 2021 · HS 2002
Central African Republic 10% 2023
Chad 10% 2023
Chile 6% 2023 · HS 2017
China 6.5% 2023
Colombia 10% 2023 · HS 2017
Comoros 20% 2021 · HS 2017
Congo - Brazzaville 10% 2023
Cook Islands 0% 2022 · HS 2017
Costa Rica 3.3% 0% – 5% 2023
Côte d’Ivoire 5% 2023 · HS 2017
Cuba 5% 2023 · HS 2017
Dominica 0% 2023 · HS 2017
Dominican Republic 8% 2023
Ecuador 0% 2023 · HS 2017
Egypt 5% 2019 · HS 2017
El Salvador 2.5% 0% – 5% 2022
Equatorial Guinea 10% 2023
Eswatini 10% 2023
Ethiopia 5% 2021 · HS 2017
European Union (27 countries) 6.5% 2023
Fiji 5% 2023
Gabon 10% 2023
Gambia 5% 2023
Georgia 0% 2022 · HS 2017
Ghana 5% 2023
Gibraltar 12% 2023 · HS 2017
Grenada 5% 2023 · HS 2012
Guatemala 2.5% 0% – 5% 2023
Guinea 5% 2023
Guinea-Bissau 5% 2023
Guyana 5% 2023 · HS 2017
Haiti 0% 2020 · HS 2017
Honduras 2.5% 0% – 5% 2023
Hong Kong SAR China 0% 2023
Iceland 0% 2023
India 7.5% 2023
Indonesia 5% 2023
Iran 10% 2020 · HS 2017
Israel 0% 2022 · HS 2017
Jamaica 0% 2023
Japan 3.1% 2023
Jordan 0% 2023
Kazakhstan 4.5% 4% – 5% 2023
Kenya 10% 2023
Kiribati 20% 2023 · HS 2002
Kuwait 5% 2023
Kyrgyzstan 4.5% 4% – 5% 2021 · HS 2017
Laos 5% 2023 · HS 2017
Lebanon 0% 2020 · HS 2017
Lesotho 10% 2023
Liberia 5% 2023
Libya 5% 2021 · HS 2017
Liechtenstein 0.6%* 2021 · HS 2017
Macao SAR China 0% 2023
Madagascar 5% 2023
Malawi 0% 2021 · HS 2017
Malaysia 6.7% 0% – 10% 2023
Maldives 10% 0% – 20% 2023
Mali 5% 2023
Mauritania 5% 2023 · HS 2017
Mauritius 0% 2023
Mexico 3% 0% – 6% 2023 · HS 2017
Micronesia 4% 2021 · HS 2017
Moldova 5% 2023 · HS 2017
Mongolia 5% 2023
Montserrat 0% 2023 · HS 2017
Morocco 10% 2.5% – 18% 2023
Mozambique 2.5% 2023
Myanmar (Burma) 1.5% 2023 · HS 2017
Namibia 10% 2023
Nauru 10% 2021 · HS 2017
Nepal 10% 2023
New Zealand 2.5% 0% – 5% 2023
Nicaragua 2.5% 0% – 5% 2023
Niger 5% 2023
Nigeria 5% 2023
North Macedonia 3% 2023
Norway 0% 2023
Oman 5% 2023
Pakistan 16% 2023
Palau 3% 2023 · HS 2012
Palestinian Territories 0% 2017 · HS 2017
Panama 0% 2023
Papua New Guinea 0% 2023
Paraguay 14% 2023 · HS 2017
Peru 0% 2023 · HS 2017
Philippines 5% 2023
Qatar 5% 2023
Russia 4.5% 4% – 5% 2021 · HS 2017
Rwanda 10% 2023
Samoa 8% 2020 · HS 2017
São Tomé & Príncipe 10% 2019 · HS 2017
Saudi Arabia 6.5% 2023
Senegal 5% 2023
Seychelles 0% 2023
Sierra Leone 5% 2023
Singapore 0% 2023 · HS 2017
Solomon Islands 10% 2023 · HS 2017
Somalia 15% 2023 · HS 2017
South Africa 10% 2023
South Korea 6.5% 2023
Sri Lanka 0% 2023
St Kitts & Nevis 0% 2023
St Lucia 0% 2023 · HS 2012
St Pierre & Miquelon 5% 2021 · HS 2017
St Vincent & the Grenadines 0% 2023
Sudan 3% 2021 · HS 2017
Suriname 5% 2023 · HS 2007
Switzerland 0.5%* 2023
Syria 1% 2020 · HS 2012
Tajikistan 6.5% 2021 · HS 2012
Tanzania 10% 2023
Thailand 3% 2023
Togo 5% 2023
Tonga 15% 2023 · HS 2017
Trinidad & Tobago 0% 2023 · HS 2012
Türkiye 6.5% 2023
Tuvalu 0% 2017 · HS 2017
Uganda 10% 2023
Ukraine 2.3% 0% – 5% 2023 · HS 2017
United Arab Emirates 5% 2023
United Kingdom 2% 0% – 6% 2023
United States 4.1% 0% – 6.5% 2023
Uruguay 0% 2023 · HS 2017
Uzbekistan 0% 2021 · HS 2017
Vanuatu 0% 2023
Venezuela 14% 2023 · HS 2017
Vietnam 5% 2023
Wallis & Futuna 6% 2021 · HS 2012
Yemen 5% 2017 · HS 2017
Zambia 0% 2023
Zimbabwe 0.1% 2023

Tariff data years 2017–2023; rates may have changed since. * ad valorem equivalent of specific duties (UNCTAD estimate) · UNCTAD TRAINS, accessed via WITS (World Bank)

Classifications and correspondences

Where this HS subheading sits in the United Nations' statistical classifications, and which codes it had in earlier editions of the Harmonized System.

SITC Rev. 4
57434 Other polyesters, unsaturated
End use (BEC Rev. 5)
Intermediate goods · BEC 211210
CPC 2.1 product
34740 Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms
ISIC Rev. 4 activity
2013 Manufacture of plastics and synthetic rubber in primary forms

Earlier HS editions

HSCode
20173907.91unchanged
20123907.91unchanged
20073907.91unchanged
20023907.91unchanged
19963907.91unchanged
19923907.91unchanged

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 4

Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.

  • N303296 U.S. CBP 18 March 2019 · 3907.91.20.00

    The tariff classification of Radpar AD-032 from Japan

  • N273662 U.S. CBP 25 March 2016 · 3907.91.50.00

    The tariff classification of a thermal spray powder from Germany

  • 600010228 HMRC 26 June 2024 – 25 June 2027 · 3907 91 10 00

    Castor Polyol Chemically modified castor oil use: production of polyurethane The product is packaged in 1000kg IBC's or 200kg drums

  • 600010353 HMRC 26 June 2024 – 25 June 2027 · 3907 91 10 00

    Castor polyol D-1145 Chemically modified castor oil use: production of polyurethane The product is packaged in 1000kg IBCs or 200kg drums

Recent rule changes mentioning this code

Acts whose text cites this code or its heading. Check the act itself: a code can be cited for reasons other than a change of its duty.

  1. GB Sanctions · Applies from:

    The Russia (Sanctions) (EU Exit) (Amendment) Regulations 2026

    S.I. 2026/543 · Source: legislation.gov.uk

  2. EU Anti-dumping · Applies from:

    Commission Implementing Regulation (EU) 2026/1063 of 12 May 2026 imposing a provisional anti-dumping duty on imports of PET Spunbond originating in the People’s Republic of China

    CELEX 32026R1063 · Source: eur-lex.europa.eu

  3. GB Tariff change

    Autonomous Suspension under Authorised Use on Offshore Wind Turbines. Stop Press – 17 March 2026

    Trade Tariff news 5311 · Source: trade-tariff.service.gov.uk

Rule changes →

In the UK Global Tariff, subheading 3907.91 covers 3 tariff lines and the duty is between 0% and 6%. 2 of them are duty-free.

The EU Combined Nomenclature divides subheading 3907.91 into 2 tariff lines; the duty is 6.5%.

Goods from 174 countries can enter the UK at a preferential rate instead of the standard Free – 6%; 174 of them pay no duty at all, for example under DCTS Comprehensive or European Union.

In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.

In the 12 months to August 2026, the UK imported unsaturated polyester resins worth £73.6m (up 6% on the year before), at an average of £2.23 per kg; France supplied 33%, followed by Italy.

World trade in unsaturated polyester resins reached US$3bn in 2024, down 3.4% on 2023.

China was the largest exporter with 11.2% of the total, ahead of Italy.

Questions and answers

What is the HS code for polyacetals, other polyethers and epoxide resins: other polyesters, unsaturated?

Polyacetals, other polyethers and epoxide resins: other polyesters, unsaturated fall under HS subheading 3907.91, part of heading 3907, in section VII of the Harmonized System.

What is the import duty on polyacetals, other polyethers and epoxide resins in the UK?

Under the UK Global Tariff, imports under 3907.91 from countries without a preferential agreement are charged at 0% to 6%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.

What is the import duty on polyacetals, other polyethers and epoxide resins in the EU?

Under the EU Combined Nomenclature, imports under 3907.91 from countries without a preferential agreement are charged at 6.5%. Preferential rates, anti-dumping duties and VAT are not included.

Which country exports the most polyacetals, other polyethers and epoxide resins?

China, with US$332m in 2024 (11.2% of world exports).

Which countries can export unsaturated polyester resins to the UK duty-free?

174 countries pay no duty under a trade agreement or preference scheme, among them partners under DCTS Comprehensive, European Union, DCTS Enhanced. The goods must meet the agreement’s rules of origin and the importer needs proof of origin; otherwise the standard rate of Free – 6% applies. Pick a country above to see its rate.

Is there anti-dumping duty on unsaturated polyester resins?

The UK charges additional duty of 35% on goods from Belarus and Russia. Lower rates apply to the named exporters listed in the measure.

Where does the UK import unsaturated polyester resins from?

In the 12 months to August 2026, the largest suppliers were France (33%), Italy (15%) and Finland (10%), out of total imports of £73.6m.

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