Subheading · Chapter 29 · Heading 2903
2903.51: 2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz)
HFO refrigerants (HFO-1234yf etc.)
2903.51 is the HS subheading for HFO refrigerants (HFO-1234yf etc.), under heading 2903 in chapter 29.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 2903 51 00 00 2.3,3.3-tetrafluoropropene (hfo-1234yf), 1.3,3.3-tetrafluoropropene (hfo-1234ze) and (z)-1.1,1.4,4.4-hexafluoro-2-butene (hfo-1336mzz) 4%
- 2903 51 00 10 2.3,3.3-tetrafluoroprop-1-ene (2.3,3.3-tetrafluoropropene) (cas rn 754-12-1) 4%
- 2903 51 00 20 Trans-1.3,3.3-tetrafluoroprop-1-ene (trans-1.3,3.3-tetrafluoropropene) (cas rn 29118-24-9) 4%
- 2903 51 00 90 Other 4%
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 2028
- Legal act
- 2020 No. 1435
- Tariff lines
- on 2 of 3 lines
- Duty suspensionSuspension - goods for certain categories of ships, boats and other vessels and for drilling or production platforms Free
- Applies to goods from
- all countries
- Legal act
- 2020 No. 1431
- Documents
- C990 End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
Import requirements 4
- Prohibition or restrictionImport prohibition
- Applies to goods from
- North Korea
- Legal act
- S.I. 2019/411
- 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
- Import controlImport control of fluorinated greenhouse gases
- Applies to goods from
- all countries
- Legal act
- 517/2014
- Documents
- Y054 Goods labelled according to the provisions of Article 12 of Regulation (EU) 2024/573
- Y053
- Y986 Exemption from import prohibition according to Article 11.1 and 11.2 of Regulation (EU) 2024/573
- Y926
- 9066
- Y956
- Y123 Undertaking registered in the F-Gas Portal according to Article 20 of Regulation (EU) 2024/573
- Y124
- Y976
Preferential rates by country
| Agreement or scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | 4% |
| 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 |
|---|---|---|---|
 United States | £51.2m | 84.1% | +21.1% |
 China | £8.9m | 14.6% | +109.3% |
 Italy | £339k | 0.6% | +18.3% |
 Germany | £154k | 0.3% | +231.6% |
 Belgium | £104k | 0.2% | -40.5% |
 Ireland | £84k | 0.1% | +312% |
 France | £35k | 0.1% | +10.9% |
 Canada | £33k | 0.1% | +36.1% |
Same subheading in other tariffs
EU 5.5% Third-country duty 1 tariff line 
Türkiye 5.5% Third-country duty 1 tariff line USA 3.7% General (MFN) 1 tariff line Canada Free General (MFN) 1 tariff line 
Mexico Free General (MFN) 1 tariff line 
Brazil Free General (MFN) 1 tariff line 
Argentina Free General (MFN) 1 tariff line 
Peru Free General (MFN) 1 tariff line 
New Zealand Free General (MFN) 3 tariff lines 
Japan 3.1% General (MFN) 3 tariff lines 
Taiwan 5% General (MFN) 1 tariff line 
GCC 5% General (MFN) 2 tariff lines 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia 5% General (MFN) 3 tariff lines 
Nigeria 5% General (MFN) 1 tariff line World trade in 2024
Trade value (US$) no reported trade < US$505kUS$505k+US$3m+US$21m+> US$391m
Exports: 56
- United States: US$634m
- China: US$391m
- Netherlands: US$267m
- Ireland: US$41m
- Czechia: US$21m
- Germany: US$21m
- Mexico: US$14m
- Italy: US$9m
- Belgium: US$7m
- France: US$6m
- United Kingdom: US$6m
- Switzerland: US$3m
- India: US$3m
- Sweden: US$3m
- Japan: US$2m
- Spain: US$2m
- Austria: US$2m
- Estonia: US$2m
- Poland: US$2m
- Greece: US$1m
- South Korea: US$1m
- Finland: US$1m
- Lithuania: US$896k
- Iran: US$704k
- Malaysia: US$693k
- Morocco: US$645k
- Hungary: US$592k
- Taiwan: US$505k
- Singapore: US$320k
- Brazil: US$298k
- Romania: US$210k
- Canada: US$139k
- Türkiye: US$139k
- Kazakhstan: US$94k
- Denmark: US$84k
- Slovakia: US$70k
- Portugal: US$46k
- Slovenia: US$44k
- United Arab Emirates: US$43k
- South Africa: US$42k
- Israel: US$38k
- Vietnam: US$27k
- Norway: US$22k
- New Zealand: US$14k
- Serbia: US$9k
- Hong Kong SAR China: US$9k
- Armenia: US$5k
- Latvia: US$4k
- Bulgaria: US$4k
- Côte d’Ivoire: US$300
- Barbados: US$200
- Croatia: US$200
- Cyprus: US$100
- Luxembourg: US$100
- Pakistan: US$100
- Malta: US$0
Trade value (US$) no reported trade < US$84kUS$84k+US$3m+US$39m+> US$92m
Imports: 126
- Netherlands: US$341m
- Germany: US$136m
- United Kingdom: US$93m
- United States: US$92m
- South Korea: US$90m
- Japan: US$81m
- Mexico: US$79m
- France: US$64m
- Canada: US$59m
- Czechia: US$54m
- Türkiye: US$50m
- Spain: US$47m
- Italy: US$39m
- China: US$33m
- Belgium: US$27m
- Morocco: US$24m
- Slovakia: US$15m
- Poland: US$13m
- Romania: US$11m
- Taiwan: US$9m
- South Africa: US$9m
- Hungary: US$9m
- Austria: US$7m
- Sweden: US$7m
- Finland: US$6m
- Portugal: US$5m
- Switzerland: US$5m
- Slovenia: US$4m
- Thailand: US$4m
- India: US$3m
- United Arab Emirates: US$3m
- Singapore: US$3m
- Norway: US$2m
- Malaysia: US$2m
- Denmark: US$2m
- Brazil: US$2m
- Australia: US$1m
- Estonia: US$1m
- Lithuania: US$1m
- Ireland: US$1m
- Iraq: US$929k
- Latvia: US$822k
- Israel: US$810k
- Russia: US$687k
- Greece: US$652k
- Saudi Arabia: US$618k
- Philippines: US$548k
- Serbia: US$530k
- Egypt: US$495k
- Hong Kong SAR China: US$480k
- Ukraine: US$420k
- Bulgaria: US$349k
- Vietnam: US$348k
- Albania: US$184k
- Chile: US$152k
- Croatia: US$113k
- Iceland: US$113k
- Luxembourg: US$102k
- Cyprus: US$98k
- Bosnia & Herzegovina: US$95k
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | United States | US$634m | 43.9% |
| 2 | China | US$391m | 27% |
| 3 |  Netherlands | US$267m | 18.5% |
| 4 | Ireland | US$41m | 2.8% |
| 5 |  Czechia | US$21m | 1.4% |
| 6 | Germany | US$21m | 1.4% |
| 7 | Mexico | US$14m | 1% |
| 8 | Italy | US$9m | 0.6% |
| 9 | Belgium | US$7m | 0.5% |
| 10 | France | US$6m | 0.4% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | Netherlands | US$341m | 23.6% |
| 2 | Germany | US$136m | 9.4% |
| 3 | United Kingdom | US$93m | 6.4% |
| 4 | United States | US$92m | 6.4% |
| 5 |  South Korea | US$90m | 6.3% |
| 6 | Japan | US$81m | 5.6% |
| 7 | Mexico | US$79m | 5.5% |
| 8 | France | US$64m | 4.4% |
| 9 | Canada | US$59m | 4.1% |
| 10 | Czechia | US$54m | 3.7% |
Import duty on this product around the world 97
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
- 35number of duty-free countries (MFN)
- 45%highest: Bahamas, Fiji, Bermuda
97
| Importing country | MFN duty | lines from – to | data year |
|---|---|---|---|
 Albania | 0% | 2023 | |
 Algeria | 15% | 2023 | |
 Antigua & Barbuda | 5% | 2021 · HS 2007 | |
 Armenia | 5% | 2023 | |
 Australia | 0% | 2023 | |
 Bahamas | 45% | 2022 | |
 Bahrain | 5% | 2023 | |
 Belize | 5% | 2023 | |
 Benin | 5% | 2023 | |
 Bermuda | 25% | 2023 | |
 Bhutan | 10% | 2022 | |
 Bosnia & Herzegovina | 5% | 2022 | |
 Botswana | 0% | 2023 | |
 Burkina Faso | 5% | 2023 | |
 Burundi | 0% | 2023 | |
 Cameroon | 10% | 2023 | |
| Canada | 0% | 2023 | |
 Cayman Islands | 22% | 2021 · HS 2002 | |
 Central African Republic | 10% | 2023 | |
 Chad | 10% | 2023 | |
| China | 5.5% | 2023 | |
 Congo - Brazzaville | 10% | 2023 | |
 Costa Rica | 0% | 2023 | |
 Dominican Republic | 0% | 2023 | |
 El Salvador | 0% | 2022 | |
 Equatorial Guinea | 10% | 2023 | |
 Eswatini | 0% | 2023 | |
| European Union (27 countries) | 5.5% | 2023 | |
 Fiji | 32% | 2023 | |
 French Polynesia | 8% | 2023 | |
 Gabon | 10% | 2023 | |
 Gambia | 5% | 2023 | |
 Ghana | 5% | 2023 | |
 Guatemala | 10% | 2023 | |
 Guinea | 5% | 2023 | |
 Guinea-Bissau | 5% | 2023 | |
 Honduras | 0% | 2023 | |
 Hong Kong SAR China | 0% | 2023 | |
 Iceland | 0% | 2023 | |
 India | 5% | 2023 | |
 Indonesia | 5% | 2023 | |
 Jamaica | 0% | 2023 | |
| Japan | 3.1% | 2023 | |
 Jordan | 0% | 2023 | |
 Kazakhstan | 5% | 2023 | |
 Kenya | 0% | 2023 | |
 Kiribati | 0% | 2023 · HS 2002 | |
 Kuwait | 5% | 2023 | |
 Lesotho | 0% | 2023 | |
 Liberia | 5% | 2023 | |
 Macao SAR China | 0% | 2023 | |
 Madagascar | 5% | 2023 | |
 Malaysia | 0% | 2023 | |
 Maldives | 15% | 2023 | |
 Mali | 5% | 2023 | |
 Mauritius | 0% | 2023 | |
 Mongolia | 5% | 2023 | |
 Morocco | 2.5% | 2023 | |
 Mozambique | 2.5% | 2023 | |
 Namibia | 0% | 2023 | |
 Nepal | 10% | 2023 | |
| New Zealand | 0% | 2023 | |
 Nicaragua | 0% | 2023 | |
 Niger | 5% | 2023 | |
| Nigeria | 5% | 2023 | |
| North Macedonia | 5% | 2023 | |
| Norway | 0% | 2023 | |
 Oman | 5% | 2023 | |
 Pakistan | 0% | 2023 | |
 Panama | 0% | 2023 | |
 Papua New Guinea | 0% | 2023 | |
 Philippines | 3% | 2023 | |
 Qatar | 5% | 2023 | |
 Rwanda | 0% | 2023 | |
 Saudi Arabia | 5% | 2023 | |
 Senegal | 5% | 2023 | |
 Seychelles | 0% | 2023 | |
 Sierra Leone | 5% | 2023 | |
 South Africa | 0% | 2023 | |
| South Korea | 5.5% | 2023 | |
 Sri Lanka | 0% | 2023 | |
 St Kitts & Nevis | 5% | 2023 | |
 St Vincent & the Grenadines | 5% | 2023 | |
 Suriname | 5% | 2023 · HS 2007 | |
| Switzerland | 0%* | 2023 | |
 Tanzania | 0% | 2023 | |
 Thailand | 0% | 2023 | |
 Togo | 5% | 2023 | |
| Türkiye | 5.5% | 2023 | |
 Uganda | 0% | 2023 | |
 United Arab Emirates | 5% | 2023 | |
| United Kingdom | 4% | 2023 | |
| United States | 3.7% | 2023 | |
 Vanuatu | 5% | 2023 | |
 Vietnam | 5% | 2023 | |
 Zambia | 0% | 2023 | |
 Zimbabwe | 0.1% | 2023 |
Tariff data years 2021–2023; 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
- 51137 Fluorinated, brominated/iodinated derivatives of acyclic hydrocarbons
- End use (BEC Rev. 5)
- Intermediate goods · BEC 211220
- CPC 2.1 product
- 34110 Hydrocarbons and their halogenated, sulphonated, nitrated or nitrosated derivatives
- ISIC Rev. 4 activity
- 2011 Manufacture of basic chemicals
Earlier HS editions
| HS | Code | |
|---|---|---|
| 2017 | 2903.39 | changed |
| 2012 | 2903.39 | changed |
| 2007 | 2903.39 | changed |
| 2002 | 2903.30 | changed |
| 1996 | 2903.30 | changed |
| 1992 | 2903.30 | 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.
- Tariff change
FR Doc. 2026-19498 · 91 FR 60360 · Source: federalregister.gov
- Import and export controls
FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov
- Tariff change
FR Doc. 2026-11158 · 91 FR 33854 · Source: federalregister.gov
Code history
Since 2022; before, these goods were classified under 2903.39.
The UK Global Tariff divides subheading 2903.51 into 3 tariff lines; the duty is 4%.
Subheading 2903.51 is a single line in the EU Combined Nomenclature, where the duty is 5.5%.
174 countries pay no duty in the UK thanks to trade agreements and preference schemes such as DCTS Comprehensive and European Union, against a standard rate of 4%.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
Imports of HFO refrigerants (HFO-1234yf etc.) into the UK came to £60.9m between September 2025 and August 2026 (up 28% on the year before); United States supplied 84%, followed by China.
In 2024, countries exported HFO refrigerants (HFO-1234yf etc.) worth US$1.4bn (+12.3% year on year).
The largest exporter was the United States (US$634m), followed by China.
Questions and answers
What is the HS code for 2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz)?
2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz) fall under HS subheading 2903.51, part of heading 2903, in section VI of the Harmonized System.
What is the import duty on 2,3,3,3-Tetrafluoropropene in the UK?
Under the UK Global Tariff, imports under 2903.51 from countries without a preferential agreement are charged at 4%. Preferential rates, anti-dumping duties and VAT are not included.
What is the import duty on 2,3,3,3-Tetrafluoropropene in the EU?
Under the EU Combined Nomenclature, imports under 2903.51 from countries without a preferential agreement are charged at 5.5%. Preferential rates, anti-dumping duties and VAT are not included.
Which country exports the most 2,3,3,3-Tetrafluoropropene?
The United States, with US$634m in 2024 (43.9% of world exports).
Which countries can export HFO refrigerants (HFO-1234yf etc.) 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 4% applies. Pick a country above to see its rate.
Is there anti-dumping duty on HFO refrigerants (HFO-1234yf etc.)?
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 HFO refrigerants (HFO-1234yf etc.) from?
In the 12 months to August 2026, the largest suppliers were United States (84%), China (15%) and Italy (1%), out of total imports of £60.9m.