Subheading · Chapter 38 · Heading 3811

3811.19

3811.19: Anti-knock preparations, oxidation inhibitors: anti-knock preparations, other

Official description Other

3811.19 is a six-digit subheading of heading 3811, anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity…, chapter 38.

What you pay

Importing into UK

Customs duty 4% standard rate · across 2 national lines depends on the country of origin
Additional duties and charges 3 additional measures Import requirements: 1
VAT 20.00 % import VAT
Duty calculatorCalculate duty and taxes →

Rates by national line · UK Global Tariff

UK lines →
  1. 3811 19 00 00 Other 4%
  2. 3811 19 00 10 Solution of more than 61% but not more than 63% by weight of methylcyclopentadienyl manganese tricarbonyl in an aromatic hydrocarbon solvent, containing by weight not more than: - 4.9% of 1.2,4-trimethyl-benzene, - 4.9% of naphthalene, and - 0.5% of 1.3,5-trimethyl-benzene 4%
  3. 3811 19 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

  • 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 1 of 2 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
  • Excise dutyExcises
    Applies to goods from
    all countries

Import requirements 1

  • 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

Preferential rates by country

Agreement or schemeCountriesRate
standard rate (no agreement)—4%
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£1.8m-19.2% · previous 12 months
Average import price£4.98 per kg
Jan 2024: £126kFeb 2024: £248kMar 2024: £342kApr 2024: £15kMay 2024: £6kJun 2024: £6kJul 2024: £295kAug 2024: £282kSept 2024: £291kOct 2024: £337kNov 2024: £7kJan 2025: £62kFeb 2025: £180kMar 2025: £247kMay 2025: £346kJun 2025: £1kJul 2025: £562kAug 2025: £136kSept 2025: £11kOct 2025: £2kNov 2025: £229kDec 2025: £117kFeb 2026: £114kMar 2026: £107kApr 2026: £107kMay 2026: £337kJun 2026: £238kJul 2026: £181kAug 2026: £310k 20242025
Data up to August 2026 (provisional) · Monthly data: Eurostat Comext (CC BY 4.0), HMRC (OGL v3.0)

Main suppliers, last 12 months

CountryValueShareChange
United States £1.6m 89.9% -20.4%
Netherlands £149k 8.5% +4,016.5%
China £22k 1.3% —
Germany £3k 0.2% -97.5%
France £2k 0.1% -96.6%
United Kingdom £1k 0.1% —
Ireland £58 0% -50%
South Africa £0 0% -100%

Same subheading in other tariffs

World trade in 2024

3811.19 · US$172m

Trade value (US$) no reported trade < US$122kUS$122k+US$713k+US$4m+> US$22m

Exports: 78
  1. China: US$43m
  2. India: US$36m
  3. United States: US$22m
  4. Russia: US$12m
  5. Belgium: US$12m
  6. United Kingdom: US$8m
  7. Saudi Arabia: US$8m
  8. Germany: US$4m
  9. Spain: US$4m
  10. Netherlands: US$3m
  11. Japan: US$2m
  12. France: US$2m
  13. Singapore: US$2m
  14. Indonesia: US$2m
  15. South Korea: US$1m
  16. Thailand: US$974k
  17. Serbia: US$901k
  18. Denmark: US$846k
  19. South Africa: US$713k
  20. Taiwan: US$675k
  21. Australia: US$655k
  22. United Arab Emirates: US$592k
  23. Italy: US$581k
  24. Austria: US$546k
  25. Czechia: US$411k
  26. Slovenia: US$401k
  27. Canada: US$318k
  28. Poland: US$303k
  29. Curaçao: US$205k
  30. Estonia: US$187k
  31. Latvia: US$162k
  32. Philippines: US$162k
  33. Malaysia: US$151k
  34. Argentina: US$150k
  35. Finland: US$147k
  36. Lithuania: US$133k
  37. Türkiye: US$131k
  38. Greece: US$122k
  39. Mexico: US$104k
  40. Romania: US$102k
  41. Sweden: US$93k
  42. Oman: US$90k
  43. Hong Kong SAR China: US$51k
  44. Colombia: US$48k
  45. Switzerland: US$47k
  46. Egypt: US$45k
  47. North Macedonia: US$38k
  48. Iran: US$37k
  49. Israel: US$28k
  50. Brazil: US$26k
  51. Croatia: US$24k
  52. Slovakia: US$22k
  53. Kazakhstan: US$20k
  54. Nicaragua: US$20k
  55. Portugal: US$15k
  56. Norway: US$10k
  57. New Zealand: US$10k
  58. Costa Rica: US$8k
  59. Nigeria: US$7k
  60. Guatemala: US$6k

Top exporters

RankCountryValueShare
1 China US$43m 25%
2 India US$36m 20.8%
3 United States US$22m 13%
4 Russia US$12m 7.2%
5 Belgium US$12m 7%
6 United Kingdom US$8m 4.5%
7 Saudi Arabia US$8m 4.5%
8 Germany US$4m 2.5%
9 Spain US$4m 2.2%
10 Netherlands US$3m 1.7%

Top importers

RankCountryValueShare
1 Belgium US$24m 14%
2 Singapore US$20m 11.9%
3 Netherlands US$14m 8.4%
4 Cyprus US$13m 7.8%
5 Uzbekistan US$10m 5.9%
6 Iraq US$9m 5.4%
7 Tunisia US$7m 3.8%
8 Saudi Arabia US$5m 3%
9 Canada US$5m 2.7%
10 United Arab Emirates US$4m 2.5%

Import duty on this product around the world 165

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
  • 34number of duty-free countries (MFN)
  • 45%highest: Bahamas, Bermuda, Cayman Islands

165

Importing countryMFN dutylines from – todata year
Afghanistan 5% 2018 · HS 2012
Albania 2% 2023
Algeria 15% 2023
Angola 0% 2023 · HS 2017
Anguilla 10% 2021 · HS 2017
Antigua & Barbuda 5% 2021 · HS 2007
Argentina 2% 2023 · HS 2017
Armenia 5% 2023
Aruba 12% 2021 · HS 2012
Australia 0% 2023
Azerbaijan 5% 2023 · HS 2017
Bahamas 45% 2022
Bahrain 5% 2023
Bangladesh 5% 2023 · HS 2017
Barbados 5% 2022 · HS 2017
Belarus 5% 2021 · HS 2017
Belize 5% 2023
Benin 10% 2023
Bermuda 25% 2023
Bhutan 10% 2022
Bolivia 10% 2023 · HS 2017
Bosnia & Herzegovina 5% 2022
Botswana 0% 2023
Brazil 2% 2023 · HS 2017
Brunei 0% 2023 · HS 2017
Burkina Faso 10% 2023
Burundi 10% 2023
Cambodia 7% 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 0% 2023 · HS 2017
Comoros 20% 2021 · HS 2017
Congo - Brazzaville 10% 2023
Cook Islands 0% 2022 · HS 2017
Costa Rica 5% 2023
Côte d’Ivoire 10% 2023 · HS 2017
Cuba 10% 2023 · HS 2017
Dominica 5% 2023 · HS 2017
Dominican Republic 0% 2023
Ecuador 0% 2023 · HS 2017
Egypt 5% 2019 · HS 2017
El Salvador 5% 2022
Equatorial Guinea 10% 2023
Eswatini 0% 2023
Ethiopia 10% 2021 · HS 2017
European Union (27 countries) 5.8% 2023
Fiji 5% 2023
French Polynesia 8% 2023
Gabon 10% 2023
Gambia 10% 2023
Georgia 0% 2022 · HS 2017
Ghana 10% 2023
Gibraltar 0% 2023 · HS 2017
Grenada 5% 2023 · HS 2012
Guatemala 5% 2023
Guinea 10% 2023
Guinea-Bissau 10% 2023
Guyana 5% 2023 · HS 2017
Haiti 5% 2020 · HS 2017
Honduras 5% 2023
Hong Kong SAR China 0% 2023
Iceland 0% 2023
India 10% 2023
Indonesia 5% 2023
Iran 5% 2020 · HS 2017
Israel 12% 2022 · HS 2017
Jamaica 0% 2023
Japan 0% 2023
Jordan 5% 2023
Kazakhstan 5% 2023
Kenya 10% 2023
Kiribati 0% 2023 · HS 2002
Kuwait 5% 2023
Kyrgyzstan 5% 2021 · HS 2017
Laos 10% 2023 · HS 2017
Lebanon 0% 2020 · HS 2017
Lesotho 0% 2023
Liberia 10% 2023
Libya 5% 2021 · HS 2017
Liechtenstein 1%* 2021 · HS 2017
Macao SAR China 0% 2023
Madagascar 10% 2023
Malawi 10% 2021 · HS 2017
Malaysia 5% 2023
Maldives 15% 2023
Mali 10% 2023
Mauritania 10% 2023 · HS 2017
Mauritius 0% 2023
Mexico 0% 2023 · HS 2017
Micronesia 4% 2021 · HS 2017
Moldova 6.5% 2023 · HS 2017
Mongolia 5% 2023
Montserrat 15% 2023 · HS 2017
Morocco 2.5% 2023
Mozambique 7.5% 2023
Myanmar (Burma) 3% 2023 · HS 2017
Namibia 0% 2023
Nauru 10% 2021 · HS 2017
Nepal 15% 2023
New Zealand 0% 2023
Nicaragua 5% 2023
Niger 10% 2023
Nigeria 10% 2023
North Macedonia 5% 2023
Norway 0% 2023
Oman 5% 2023
Pakistan 20% 2023
Palau 3% 2023 · HS 2012
Palestinian Territories 12% 2017 · HS 2017
Panama 5% 2023
Papua New Guinea 0% 2023
Paraguay 2% 2023 · HS 2017
Peru 0% 2023 · HS 2017
Philippines 3% 2023
Qatar 5% 2023
Russia 5% 2021 · HS 2017
Rwanda 10% 2023
Samoa 8% 2020 · HS 2017
São Tomé & Príncipe 10% 2019 · HS 2017
Saudi Arabia 5% 2023
Senegal 10% 2023
Seychelles 0% 2023
Sierra Leone 10% 2023
Singapore 0% 2023 · HS 2017
Solomon Islands 10% 2023 · HS 2017
Somalia 15% 2023 · HS 2017
South Africa 0% 2023
South Korea 6.5% 2023
Sri Lanka 0% 2023
St Kitts & Nevis 5% 2023
St Lucia 5% 2023 · HS 2012
St Pierre & Miquelon 5% 2021 · HS 2017
St Vincent & the Grenadines 5% 2023
Sudan 10% 2021 · HS 2017
Suriname 5% 2023 · HS 2007
Switzerland 1.1%* 2023
Syria 5% 2020 · HS 2012
Tajikistan 6.5% 2021 · HS 2012
Tanzania 10% 2023
Thailand 5% 2023
Togo 10% 2023
Tonga 15% 2023 · HS 2017
Trinidad & Tobago 0% 2023 · HS 2012
Türkiye 5.8% 2023
Tuvalu 0% 2017 · HS 2017
Uganda 10% 2023
Ukraine 3% 2023 · HS 2017
United Arab Emirates 5% 2023
United Kingdom 4% 2023
United States 6.5% 2023
Uruguay 2% 2023 · HS 2017
Uzbekistan 5% 2021 · HS 2017
Vanuatu 5% 2023
Venezuela 2% 2023 · HS 2017
Vietnam 0% 2023
Wallis & Futuna 6% 2021 · HS 2012
Yemen 5% 2017 · HS 2017
Zambia 15% 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
59721 Anti-knock preparations
End use (BEC Rev. 5)
Intermediate goods · BEC 211210
CPC 2.1 product
35430 Lubricating preparations and preparations of a kind used for the oil or grease treatment of materials, except of petroleum; prepared additives for mineral oils; prepared liquids for hydraulic transmission, except of petroleum; anti-freezing preparations and prepared de-icing fluids
ISIC Rev. 4 activity
2029 Manufacture of other chemical products n.e.c.

Earlier HS editions

HSCode
20173811.19unchanged
20123811.19unchanged
20073811.19unchanged
20023811.19unchanged
19963811.19unchanged
19923811.19unchanged

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.

  1. GB Other

    Update to Fuel Excise Duty Rates for Tax Types X542, X556 and X571– 8 June 2026

    Trade Tariff news 6698 · Source: trade-tariff.service.gov.uk

Rule changes →

In the UK Global Tariff, subheading 3811.19 covers 2 tariff lines and the duty is 4%.

The EU Combined Nomenclature has one tariff line for subheading 3811.19; the duty is 5.8%.

Goods from 174 countries can enter the UK at a preferential rate instead of the standard 4%; 174 of them pay no duty at all, for example under DCTS Comprehensive or European Union.

In the 12 months to August 2026, the UK imported these goods worth £1.8m (down 19% on the year before), at an average of £4.98 per kg; United States supplied 90%, followed by Netherlands.

World trade in these goods reached US$172m in 2024, down 29.7% on 2023.

China was the largest exporter with 25% of the total, ahead of India.

Questions and answers

What is the HS code for anti-knock preparations, oxidation inhibitors: anti-knock preparations, other?

Anti-knock preparations, oxidation inhibitors: anti-knock preparations, other fall under HS subheading 3811.19, part of heading 3811, in section VI of the Harmonized System.

What is the import duty on anti-knock preparations, oxidation inhibitors in the UK?

Under the UK Global Tariff, imports under 3811.19 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 anti-knock preparations, oxidation inhibitors in the EU?

Under the EU Combined Nomenclature, imports under 3811.19 from countries without a preferential agreement are charged at 5.8%. Preferential rates, anti-dumping duties and VAT are not included.

Which country exports the most anti-knock preparations, oxidation inhibitors?

China, with US$43m in 2024 (25% of world exports).

Which countries can export these goods 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.

Where does the UK import these goods from?

In the 12 months to August 2026, the largest suppliers were United States (90%), Netherlands (9%) and China (1%), out of total imports of £1.8m.

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