Subheading · Chapter 39 · Heading 3909
3909.31: Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)
Polymeric MDI (crude MDI)
3909.31 is the HS subheading for polymeric MDI (crude MDI), under heading 3909 in chapter 39.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 3909 31 00 00 Poly(methylene phenyl isocyanate) (crude mdi, polymeric mdi) 6%
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 tariff suspension Free
- Applies to goods from
- all countries
- In force
- until 31 December 2026
- Legal act
- 2020 No. 1435
- Documents
- 9Y12
- 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 2
- Import controlRestriction on entry into free circulation
- Applies to goods from
- Ukraine
- Legal act
- S.I. 2022/395
- Documents
- 9009
- 9010
- 9017
- 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 scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | 6% |
| DCTS Comprehensive | Afghanistan, Angola, Bangladesh, Benin and 38 moreAfghanistan, 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") | Free | |
| DCTS Enhanced | Algeria, Bolivia, Cape Verde, Congo - Brazzaville and 13 moreAlgeria, 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 moreAntigua & 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 moreAnguilla, 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
Main suppliers, last 12 months
| Country | Value | Share | Change |
|---|---|---|---|
| £56.8m | 28% | +25.4% | |
| £49.6m | 24.4% | -6.1% | |
| £40.6m | 20% | +24.5% | |
| £39.2m | 19.3% | -26.5% | |
| £4.9m | 2.4% | +163.8% | |
| £4.6m | 2.3% | -26.2% | |
| £3.2m | 1.6% | +30.5% | |
| £1.5m | 0.7% | +993% |
Same subheading in other tariffs
World trade in 2024
Trade value (US$) no reported trade < US$581kUS$581k+US$7m+US$279m+> US$1bn
Exports: 92
- China: US$2bn
- Germany: US$1bn
- Belgium: US$1bn
- South Korea: US$723m
- Netherlands: US$609m
- Hungary: US$540m
- Saudi Arabia: US$517m
- United States: US$478m
- Japan: US$385m
- Portugal: US$279m
- Spain: US$234m
- Türkiye: US$140m
- Italy: US$42m
- Singapore: US$37m
- France: US$33m
- Poland: US$31m
- United Arab Emirates: US$18m
- Vietnam: US$18m
- Ireland: US$12m
- India: US$10m
- Malaysia: US$9m
- Denmark: US$8m
- Canada: US$7m
- Czechia: US$7m
- United Kingdom: US$7m
- Taiwan: US$6m
- Greece: US$5m
- Brazil: US$4m
- Russia: US$4m
- Lithuania: US$4m
- Latvia: US$3m
- Colombia: US$3m
- Thailand: US$3m
- Kazakhstan: US$3m
- Panama: US$2m
- Egypt: US$2m
- Sweden: US$2m
- South Africa: US$2m
- Austria: US$2m
- Romania: US$1m
- Finland: US$1m
- Slovenia: US$1m
- Hong Kong SAR China: US$926k
- Australia: US$919k
- Mexico: US$608k
- Switzerland: US$581k
- Iran: US$571k
- Peru: US$452k
- Indonesia: US$380k
- St Barthélemy: US$289k
- British Virgin Islands: US$289k
- Estonia: US$269k
- Norway: US$258k
- Chile: US$248k
- Slovakia: US$176k
- Luxembourg: US$167k
- Tunisia: US$161k
- Kuwait: US$147k
- Croatia: US$141k
- Cameroon: US$79k
Trade value (US$) no reported trade < US$3mUS$3m+US$27m+US$161m+> US$454m
Imports: 172
- United States: US$730m
- Netherlands: US$548m
- Belgium: US$510m
- Türkiye: US$502m
- China: US$495m
- Canada: US$454m
- Russia: US$402m
- India: US$371m
- Poland: US$356m
- Germany: US$302m
- Italy: US$290m
- France: US$264m
- United Arab Emirates: US$261m
- United Kingdom: US$251m
- Brazil: US$243m
- Mexico: US$194m
- Vietnam: US$167m
- Spain: US$161m
- Thailand: US$152m
- South Korea: US$144m
- Romania: US$112m
- Czechia: US$101m
- Egypt: US$85m
- Ireland: US$85m
- Indonesia: US$83m
- Japan: US$79m
- Malaysia: US$74m
- Hungary: US$48m
- Portugal: US$47m
- Austria: US$46m
- Taiwan: US$46m
- Saudi Arabia: US$42m
- Switzerland: US$41m
- Algeria: US$40m
- Colombia: US$35m
- Belarus: US$34m
- Latvia: US$33m
- Singapore: US$32m
- Greece: US$32m
- Pakistan: US$30m
- Finland: US$29m
- Philippines: US$28m
- South Africa: US$27m
- Bangladesh: US$27m
- Iraq: US$26m
- Serbia: US$25m
- Argentina: US$24m
- Slovenia: US$23m
- Australia: US$22m
- Morocco: US$21m
- Bosnia & Herzegovina: US$20m
- Bulgaria: US$20m
- Ukraine: US$19m
- Luxembourg: US$18m
- Slovakia: US$18m
- Estonia: US$17m
- Uzbekistan: US$16m
- Kazakhstan: US$16m
- Denmark: US$16m
- Chile: US$16m
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | US$2bn | 25.3% | |
| 2 | US$1bn | 13.7% | |
| 3 | US$1bn | 11.8% | |
| 4 | US$723m | 8.5% | |
| 5 | US$609m | 7.1% | |
| 6 | US$540m | 6.3% | |
| 7 | US$517m | 6% | |
| 8 | US$478m | 5.6% | |
| 9 | US$385m | 4.5% | |
| 10 | US$279m | 3.3% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | US$730m | 8.5% | |
| 2 | US$548m | 6.4% | |
| 3 | US$510m | 6% | |
| 4 | US$502m | 5.9% | |
| 5 | US$495m | 5.8% | |
| 6 | US$454m | 5.3% | |
| 7 | US$402m | 4.7% | |
| 8 | US$371m | 4.3% | |
| 9 | US$356m | 4.2% | |
| 10 | US$302m | 3.5% |
Import duty on this product around the world 152
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
- 59number of duty-free countries (MFN)
- 45%highest: Bahamas, Bermuda, Comoros
152
| Importing country | MFN duty | lines from – to | data year |
|---|---|---|---|
| 2% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 10% | 2021 · HS 2017 | ||
| 0% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 45% | 2022 | ||
| 5% | 2023 | ||
| 10% | 2023 · HS 2017 | ||
| 5% | 2022 · HS 2017 | ||
| 0% | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 25% | 2023 | ||
| 10% | 2022 | ||
| 10% | 2023 · HS 2017 | ||
| 5% | 2022 | ||
| 0% | 2023 | ||
| 14% | 2023 · HS 2017 | ||
| 0% | 2023 · HS 2017 | ||
| 5% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 10% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2023 · HS 2017 | ||
| 10% | 2023 | ||
| 10% | 2023 | ||
| 6% | 2023 · HS 2017 | ||
| 6.5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 20% | 2021 · HS 2017 | ||
| 10% | 2023 | ||
| 0% | 2022 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 · HS 2017 | ||
| 10% | 2023 · HS 2017 | ||
| 0% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 2% | 2019 · HS 2017 | ||
| 0% | 2022 | ||
| 10% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2021 · HS 2017 | ||
| 6.5% | 2023 | ||
| 5% | 2023 | ||
| 13% | 2023 | ||
| 10% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2022 · HS 2017 | ||
| 5% | 2023 | ||
| 12% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2023 · HS 2017 | ||
| 3.5% | 2020 · HS 2017 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 7.5% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2020 · HS 2017 | ||
| 0% | 2022 · HS 2017 | ||
| 0% | 2023 | ||
| 2.8% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2021 · HS 2017 | ||
| 5% | 2023 · HS 2017 | ||
| 0% | 2020 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2021 · HS 2017 | ||
| 2.5%* | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 10% | 0% – 20% | 2023 | |
| 5% | 2023 | ||
| 5% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 3% | 2023 · HS 2017 | ||
| 4% | 2021 · HS 2017 | ||
| 5% | 2023 · HS 2017 | ||
| 5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 7.5% | 2.5% – 18% | 2023 | |
| 2.5% | 2023 | ||
| 1.5% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 10% | 2021 · HS 2017 | ||
| 10% | 2023 | ||
| 2.5% | 0% – 5% | 2023 | |
| 0% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2017 · HS 2017 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 14% | 2023 · HS 2017 | ||
| 6% | 2023 · HS 2017 | ||
| 5% | 3% – 7% | 2023 | |
| 5% | 2023 | ||
| 0% | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 8% | 2020 · HS 2017 | ||
| 10% | 2019 · HS 2017 | ||
| 5% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 10% | 2023 · HS 2017 | ||
| 5% | 2023 · HS 2017 | ||
| 0% | 2023 | ||
| 6.5% | 2023 | ||
| 0% | 2023 | ||
| 0% | 2023 | ||
| 5% | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 3% | 2021 · HS 2017 | ||
| 2%* | 2023 | ||
| 0% | 2023 | ||
| 4% | 3% – 5% | 2023 | |
| 5% | 2023 | ||
| 15% | 2023 · HS 2017 | ||
| 6.5% | 2023 | ||
| 0% | 2017 · HS 2017 | ||
| 0% | 2023 | ||
| 5% | 2023 · HS 2017 | ||
| 5% | 2023 | ||
| 6% | 2023 | ||
| 6.5% | 2023 | ||
| 0% | 2023 · HS 2017 | ||
| 0% | 2021 · HS 2017 | ||
| 0% | 2023 | ||
| 14% | 2023 · HS 2017 | ||
| 3% | 2023 | ||
| 5% | 2017 · HS 2017 | ||
| 0% | 2023 | ||
| 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
- 57543 Other amino resins
- End use (BEC Rev. 5)
- Intermediate goods · BEC 211210
- CPC 2.1 product
- 34790 Other plastics in primary forms; ion exchangers
- ISIC Rev. 4 activity
- 2013 Manufacture of plastics and synthetic rubber in primary forms
Earlier HS editions
| HS | Code | |
|---|---|---|
| 2017 | 3909.31 | unchanged |
| 2012 | 3909.30 | changed |
| 2007 | 3909.30 | changed |
| 2002 | 3909.30 | changed |
| 1996 | 3909.30 | changed |
| 1992 | 3909.30 | changed |
Correspondence tables of the United Nations Statistics Division (UNSD)
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.
-
FR Doc. 2026-12771 · 91 FR 38393 · Source: federalregister.gov
-
FR Doc. 2026-07055 · 91 FR 18820 · Source: federalregister.gov
Code history
Since 2017; before, these goods were classified under 3909.30.
Subheading 3909.31 is a single line in the UK Global Tariff, where the duty is 6%.
The EU Combined Nomenclature has one tariff line for subheading 3909.31; the duty is 6.5%.
Goods from 174 countries can enter the UK at a preferential rate instead of the standard 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 polymeric MDI (crude MDI) worth £203.1m (up 3% on the year before), at an average of £1.66 per kg; China supplied 28%, followed by Belgium.
World trade in polymeric MDI (crude MDI) reached US$9bn in 2024, up 5.2% on 2023.
China was the largest exporter with 25.3% of the total, ahead of Germany.
Questions and answers
What is the HS code for poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI)?
Poly(methylene phenyl isocyanate) (crude MDI, polymeric MDI) fall under HS subheading 3909.31, part of heading 3909, in section VII of the Harmonized System.
What is the import duty on poly(methylene phenyl isocyanate) (crude MDI… in the UK?
Under the UK Global Tariff, imports under 3909.31 from countries without a preferential agreement are charged at 6%. Preferential rates, anti-dumping duties and VAT are not included.
What is the import duty on poly(methylene phenyl isocyanate) (crude MDI… in the EU?
Under the EU Combined Nomenclature, imports under 3909.31 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 poly(methylene phenyl isocyanate) (crude MDI…?
China, with US$2bn in 2024 (25.3% of world exports).
Which countries can export polymeric MDI (crude MDI) 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 6% applies. Pick a country above to see its rate.
Is there anti-dumping duty on polymeric MDI (crude MDI)?
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 polymeric MDI (crude MDI) from?
In the 12 months to August 2026, the largest suppliers were China (28%), Belgium (24%) and Netherlands (20%), out of total imports of £203.1m.