Subheading · Chapter 29 · Heading 2933
2933.79: Heterocyclic compounds with nitrogen hetero-atom(s) only: lactams, other lactams
Other lactams
Official description Other lactams
2933.79 is the HS subheading for other lactams, under heading 2933 in chapter 29.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 2933 79 00 00 Other lactams
- 2933 79 00 15 Ethyl n-(tert-butoxycarbonyl)-l-pyroglutamate (cas rn 144978-12-1) 6%
- 2933 79 00 23 (s)-2-amino-3-[(s)-2-oxopyrrolidin-3-yl]propanamide hydrochloride (cas rn 2628280-48-6) with a purity by weight of 95% or more 6%
- 2933 79 00 25 Methyl 2-oxo-2.3-dihydro-1h-indole-6-carboxylate (cas rn 14192-26-8) 6%
- 2933 79 00 30 5-vinyl-2-pyrrolidone (cas rn 7529-16-0) 6%
- 2933 79 00 45 1-phenyl-3h-indol-2-one (cas rn 3335-98-6) with a purity by weight of 99% or more 6%
- 2933 79 00 55 (3s,4r)-3-amino-4-hydroxypyrrolidin-2-one hydrochloride (cas rn 2446872-13-3) with a purity by weight of 98% or more 6%
- 2933 79 00 65 1-dodecyl-2-pyrrolidone (cas rn 2687-96-9) with a purity by weight of 98% or more 6%
- 2933 79 00 75 N-(n-octyl)-2-pyrrolidone (cas rn 2687-94-7) with a purity by weight of 99% or more 6%
- 2933 79 00 85 3.5-dibromo-1-methyl-2(1h)-pyridinone (cas rn 14529-54-5) with a purity by weight of 97% or more 6%
- 2933 79 00 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 4
- 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
- Documents
- 9Y12
- Tariff lines
- on 4 of 10 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)
- 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 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 scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | Free – 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 |
|---|---|---|---|
 Switzerland | £14.9m | 26.2% | +7.3% |
 Ireland | £11.5m | 20.3% | +90.8% |
 Singapore | £10.8m | 18.9% | -49.6% |
 China | £7.7m | 13.5% | -26.1% |
 Germany | £4.2m | 7.4% | -27.2% |
 United States | £3.3m | 5.8% | +3% |
 Japan | £2.4m | 4.2% | -54.1% |
 India | £1.1m | 2% | -34.1% |
Same subheading in other tariffs
EU 6.5% Third-country duty 1 tariff line 
Türkiye 6.5% Third-country duty 4 tariff lines USA Free – 6.5% General (MFN) 7 tariff lines · average 4.2% 
Canada Free Third-country duty 1 tariff line 
Mexico Free Third-country duty 3 tariff lines 
Brazil Free Third-country duty 2 tariff lines 
Argentina Free Third-country duty 8 tariff lines 
Peru Free Third-country duty 2 tariff lines 
New Zealand Free Third-country duty 1 tariff line Japan 3.9% Third-country duty 1 tariff line 
Taiwan 5% Third-country duty 3 tariff lines 
GCC 5% Third-country duty 1 tariff line Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 1 tariff line 
North Macedonia Free Third-country duty 1 tariff line 
Nigeria 5% Third-country duty 1 tariff line World trade in 2024
Trade value (US$) no reported trade < US$770kUS$770k+US$34m+US$481m+> US$2bn
Exports: 75
- Ireland: US$4bn
- France: US$2bn
- Spain: US$2bn
- China: US$2bn
- Singapore: US$922m
- Switzerland: US$689m
- United Kingdom: US$597m
- Austria: US$481m
- Belgium: US$448m
- India: US$246m
- United States: US$235m
- Germany: US$225m
- Japan: US$197m
- Italy: US$179m
- Netherlands: US$64m
- Poland: US$43m
- South Korea: US$38m
- Czechia: US$34m
- Hong Kong SAR China: US$34m
- Mexico: US$17m
- Brazil: US$16m
- Taiwan: US$9m
- Hungary: US$7m
- Canada: US$7m
- Portugal: US$6m
- Israel: US$5m
- Argentina: US$4m
- Croatia: US$3m
- Finland: US$3m
- Malta: US$2m
- Slovenia: US$2m
- Latvia: US$2m
- Türkiye: US$2m
- Cyprus: US$1m
- Romania: US$1m
- Ukraine: US$1m
- Malaysia: US$770k
- Denmark: US$724k
- Australia: US$496k
- St Lucia: US$409k
- Greece: US$401k
- Bulgaria: US$231k
- Vietnam: US$223k
- Sweden: US$200k
- Thailand: US$180k
- Colombia: US$141k
- New Zealand: US$107k
- Slovakia: US$89k
- Jordan: US$88k
- Chile: US$64k
- Armenia: US$53k
- Guatemala: US$47k
- Belize: US$35k
- Indonesia: US$33k
- Pakistan: US$20k
- Lithuania: US$15k
- Kuwait: US$15k
- Ecuador: US$11k
- Niger: US$10k
- Kenya: US$9k
Trade value (US$) no reported trade < US$1mUS$1m+US$20m+US$200m+> US$1bn
Imports: 124
- Germany: US$3bn
- Ireland: US$3bn
- Panama: US$2bn
- Belgium: US$1bn
- United Kingdom: US$1bn
- United States: US$897m
- Portugal: US$430m
- Hong Kong SAR China: US$360m
- Spain: US$329m
- Italy: US$242m
- South Korea: US$228m
- Switzerland: US$227m
- France: US$200m
- Slovenia: US$189m
- Japan: US$180m
- Netherlands: US$101m
- Austria: US$98m
- China: US$88m
- Singapore: US$88m
- India: US$61m
- Australia: US$52m
- Türkiye: US$47m
- Romania: US$42m
- Russia: US$41m
- United Arab Emirates: US$40m
- Canada: US$39m
- Hungary: US$29m
- Brazil: US$27m
- Taiwan: US$26m
- Greece: US$21m
- Mexico: US$20m
- Poland: US$19m
- Sweden: US$17m
- Vietnam: US$17m
- Argentina: US$14m
- Israel: US$12m
- Egypt: US$12m
- Malta: US$9m
- Czechia: US$8m
- Croatia: US$8m
- Indonesia: US$8m
- Colombia: US$7m
- Malaysia: US$6m
- Chile: US$6m
- Thailand: US$5m
- Pakistan: US$5m
- Algeria: US$4m
- Jordan: US$4m
- Bangladesh: US$4m
- Saudi Arabia: US$3m
- Cyprus: US$3m
- Denmark: US$2m
- Bulgaria: US$2m
- Paraguay: US$2m
- Serbia: US$2m
- South Africa: US$2m
- Tunisia: US$2m
- Iran: US$2m
- Uzbekistan: US$1m
- Ukraine: US$1m
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | Ireland | US$4bn | 28% |
| 2 |  France | US$2bn | 16% |
| 3 |  Spain | US$2bn | 12.5% |
| 4 | China | US$2bn | 12.2% |
| 5 | Singapore | US$922m | 6.4% |
| 6 | Switzerland | US$689m | 4.8% |
| 7 | United Kingdom | US$597m | 4.1% |
| 8 |  Austria | US$481m | 3.3% |
| 9 |  Belgium | US$448m | 3.1% |
| 10 | India | US$246m | 1.7% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | Germany | US$3bn | 23.1% |
| 2 | Ireland | US$3bn | 18.3% |
| 3 |  Panama | US$2bn | 13.3% |
| 4 | Belgium | US$1bn | 7.8% |
| 5 | United Kingdom | US$1bn | 7.8% |
| 6 | United States | US$897m | 6.2% |
| 7 |  Portugal | US$430m | 3% |
| 8 |  Hong Kong SAR China | US$360m | 2.5% |
| 9 | Spain | US$329m | 2.3% |
| 10 |  Italy | US$242m | 1.7% |
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.
- 3%median duty
- 68number of duty-free countries (MFN)
- 45%highest: Bahamas, Bermuda, Cayman Islands
165
| Importing country | MFN duty | lines from – to | data year |
|---|---|---|---|
 Afghanistan | 5% | 2018 · HS 2012 | |
 Albania | 0% | 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 | 0% | 2023 | |
 Aruba | 6% | 2021 · HS 2012 | |
 Australia | 0% | 2023 | |
 Azerbaijan | 0% | 2023 · HS 2017 | |
 Bahamas | 45% | 2022 | |
 Bahrain | 5% | 2023 | |
 Bangladesh | 2.5% | 0% – 5% | 2023 · HS 2017 |
 Barbados | 5% | 2022 · HS 2017 | |
 Belarus | 0% | 2021 · HS 2017 | |
 Belize | 5% | 2023 | |
 Benin | 5% | 2023 | |
 Bermuda | 25% | 2023 | |
 Bhutan | 10% | 2022 | |
 Bolivia | 5% | 2023 · HS 2017 | |
 Bosnia & Herzegovina | 5% | 2022 | |
 Botswana | 0% | 2023 | |
| Brazil | 2% | 2023 · HS 2017 | |
 Brunei | 0% | 2023 · HS 2017 | |
 Burkina Faso | 5% | 2023 | |
 Burundi | 0% | 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 | 9% | 2023 | |
 Colombia | 0% | 2023 · HS 2017 | |
 Comoros | 20% | 2021 · HS 2017 | |
 Congo - Brazzaville | 10% | 2023 | |
 Cook Islands | 0% | 2022 · HS 2017 | |
 Costa Rica | 0% | 2023 | |
 Côte d’Ivoire | 5% | 2023 · HS 2017 | |
 Cuba | 10% | 2023 · HS 2017 | |
 Dominica | 5% | 2023 · HS 2017 | |
 Dominican Republic | 0% | 2023 | |
 Ecuador | 0% | 2023 · HS 2017 | |
 Egypt | 2% | 2019 · HS 2017 | |
 El Salvador | 0% | 2022 | |
 Equatorial Guinea | 10% | 2023 | |
 Eswatini | 0% | 2023 | |
 Ethiopia | 10% | 2021 · HS 2017 | |
| European Union (27 countries) | 6.5% | 2023 | |
 Fiji | 5% | 2023 | |
 French Polynesia | 8% | 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 | 0% | 2023 | |
 Guinea | 5% | 2023 | |
 Guinea-Bissau | 5% | 2023 | |
 Guyana | 5% | 2023 · HS 2017 | |
 Haiti | 0% | 2020 · HS 2017 | |
 Honduras | 0% | 2023 | |
| Hong Kong SAR China | 0% | 2023 | |
 Iceland | 0% | 2023 | |
| India | 7.5% | 2023 | |
 Indonesia | 0% | 2023 | |
 Iran | 6.7% | 5% – 10% | 2020 · HS 2017 |
 Israel | 0% | 2022 · HS 2017 | |
 Jamaica | 0% | 2023 | |
| Japan | 2% | 2023 | |
 Jordan | 0% | 2023 | |
 Kazakhstan | 0% | 2023 | |
 Kenya | 0% | 2023 | |
 Kiribati | 0% | 2023 · HS 2002 | |
 Kuwait | 5% | 2023 | |
 Kyrgyzstan | 0% | 2021 · HS 2017 | |
 Laos | 5% | 2023 · HS 2017 | |
 Lebanon | 5% | 2020 · HS 2017 | |
 Lesotho | 0% | 2023 | |
 Liberia | 5% | 2023 | |
 Libya | 5% | 2021 · HS 2017 | |
 Liechtenstein | 0% | 2021 · HS 2017 | |
 Macao SAR China | 0% | 2023 | |
 Madagascar | 5% | 2023 | |
 Malawi | 0% | 2021 · HS 2017 | |
 Malaysia | 0% | 2023 | |
 Maldives | 15% | 2023 | |
 Mali | 5% | 2023 | |
 Mauritania | 5% | 2023 · HS 2017 | |
 Mauritius | 0% | 2023 | |
| Mexico | 0% | 2023 · HS 2017 | |
 Micronesia | 4% | 2021 · HS 2017 | |
 Moldova | 0% | 2023 · HS 2017 | |
 Mongolia | 5% | 2023 | |
 Montserrat | 0% | 2023 · HS 2017 | |
 Morocco | 2.5% | 2023 | |
 Mozambique | 2.5% | 2023 | |
 Myanmar (Burma) | 3% | 2023 · HS 2017 | |
 Namibia | 0% | 2023 | |
 Nauru | 10% | 2021 · HS 2017 | |
 Nepal | 10% | 2023 | |
| New Zealand | 0% | 2023 | |
 Nicaragua | 0% | 2023 | |
 Niger | 5% | 2023 | |
| Nigeria | 5% | 2023 | |
| North Macedonia | 0% | 2023 | |
| Norway | 0% | 2023 | |
 Oman | 5% | 2023 | |
 Pakistan | 0% | 2023 | |
 Palau | 3% | 2023 · HS 2012 | |
 Palestinian Territories | 0% | 2017 · HS 2017 | |
| Panama | 0% | 2023 | |
 Papua New Guinea | 0% | 2023 | |
 Paraguay | 2% | 2023 · HS 2017 | |
| Peru | 0% | 2023 · HS 2017 | |
 Philippines | 3% | 2023 | |
 Qatar | 5% | 2023 | |
 Russia | 0% | 2021 · HS 2017 | |
 Rwanda | 0% | 2023 | |
 Samoa | 8% | 2020 · HS 2017 | |
 São Tomé & Príncipe | 10% | 2019 · HS 2017 | |
 Saudi Arabia | 5% | 2023 | |
 Senegal | 5% | 2023 | |
 Seychelles | 0% | 2023 | |
 Sierra Leone | 5% | 2023 | |
| Singapore | 0% | 2023 · HS 2017 | |
 Solomon Islands | 5% | 2023 · HS 2017 | |
 Somalia | 5% | 2023 · HS 2017 | |
 South Africa | 0% | 2023 | |
 South Korea | 6.5% | 2023 | |
 Sri Lanka | 0% | 2023 | |
 St Kitts & Nevis | 0% | 2023 | |
 St Lucia | 5% | 2023 · HS 2012 | |
 St Pierre & Miquelon | 8% | 2021 · HS 2017 | |
 St Vincent & the Grenadines | 5% | 2023 | |
 Sudan | 3% | 2021 · HS 2017 | |
 Suriname | 5% | 2023 · HS 2007 | |
| Switzerland | 0% | 2023 | |
 Syria | 1% | 2020 · HS 2012 | |
 Tajikistan | 0% | 2021 · HS 2012 | |
 Tanzania | 0% | 2023 | |
 Thailand | 0% | 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 | 0% | 2023 | |
 Ukraine | 0% | 2023 · HS 2017 | |
 United Arab Emirates | 5% | 2023 | |
| United Kingdom | 5.4% | 0% – 6% | 2023 |
| United States | 4.2% | 0% – 6.5% | 2023 |
 Uruguay | 2% | 2023 · HS 2017 | |
 Uzbekistan | 0% | 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 | 0% | 2023 | |
 Zimbabwe | 0.1% | 2023 |
Tariff data years 2017–2023; rates may have changed since. · 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
- 51561 Lactams
- End use (BEC Rev. 5)
- Intermediate goods · BEC 211220
- CPC 2.1 product
- 34160 Organo-sulphur compounds and other organo-inorganic compounds; heterocyclic compounds n.e.c.; nucleic acids and their salts
- ISIC Rev. 4 activity
- 2011 Manufacture of basic chemicals
Earlier HS editions
| HS | Code | |
|---|---|---|
| 2017 | 2933.79 | unchanged |
| 2012 | 2933.79 | changed |
| 2007 | 2933.79 | changed |
| 2002 | 2933.79 | changed |
| 1996 | 2933.79 | changed |
| 1992 | 2933.79 | changed |
Correspondence tables of the United Nations Statistics Division (UNSD)
Binding rulings for similar goods 15
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.
- N348588 U.S. CBP
The tariff classification of Indacaterol Base (CAS No. 312753-06-3) in bulk powder form, from Spain
- N326273 U.S. CBP
The tariff classification of Apixaban (CAS No. 503612-47-3) in bulk powder form, from Spain
- N323828 U.S. CBP
The tariff classification of Benazepril Hydrochloride (CAS No. 86541-74-4) in bulk powder form, from Spain
- N316489 U.S. CBP
The tariff classification of Ozanimod Hydrochloride (CAS No. 1618636-37-5), Brivaracetam (CAS No. 357336-20-0) and Tofacitinib Citrate (CAS No. 540737-29-9) in bulk form, from Taiwan
- N316494 U.S. CBP
The tariff classification of Nintedanib Esylate (CAS No. 656247-18-6) in bulk powder form, from Finland
- N314364 U.S. CBP
The tariff classification of Aripiprazole Lauroxil (CAS No. 1259305-29-7) in bulk form, from Spain. Correction to Ruling Number N289285
15 rulings in total for this code
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
In the UK Global Tariff, subheading 2933.79 covers 10 tariff lines and the duty is between 0% and 6%. 1 of them is duty-free.
The EU Combined Nomenclature has one tariff line for subheading 2933.79; 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 other lactams worth £56.9m (down 19% on the year before), at an average of £41.66 per kg; Switzerland supplied 26%, followed by Ireland.
World trade in other lactams reached US$14bn in 2024, down 60.1% on 2023.
Ireland was the largest exporter with 28% of the total, ahead of France.
Questions and answers
What is the HS code for heterocyclic compounds with nitrogen hetero-atom(s) only: lactams, other lactams?
Heterocyclic compounds with nitrogen hetero-atom(s) only: lactams, other lactams fall under HS subheading 2933.79, part of heading 2933, in section VI of the Harmonized System.
What is the import duty on heterocyclic compounds with nitrogen hetero-atom in the UK?
Under the UK Global Tariff, imports under 2933.79 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 heterocyclic compounds with nitrogen hetero-atom in the EU?
Under the EU Combined Nomenclature, imports under 2933.79 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 heterocyclic compounds with nitrogen hetero-atom?
Ireland, with US$4bn in 2024 (28% of world exports).
Which countries can export other lactams 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 other lactams?
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 other lactams from?
In the 12 months to August 2026, the largest suppliers were Switzerland (26%), Ireland (20%) and Singapore (19%), out of total imports of £56.9m.