Subheading · Chapter 29 · Heading 2933
2933.21: Hydantoin and its derivatives
Subheading 2933.21 belongs to heading 2933 (heterocyclic compounds with nitrogen hetero-atom(s) only) in chapter 29.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 2933 21 00 00 Hydantoin and its derivatives
- 2933 21 00 45 Sodium (5s,8s)-8-methoxy-2.4-dioxo-1.3-diazaspiro[4.5]decan-3-ide (cas rn 1400584-86-2) with a purity by weight of 90% or more 6%
- 2933 21 00 50 1-bromo-3-chloro-5.5-dimethylhydantoin (cas rn 16079-88-2) / (cas rn 32718-18-6) 6%
- 2933 21 00 55 1-aminohydantoin hydrochloride (cas rn 2827-56-7) 6%
- 2933 21 00 60 Dl-p-hydroxyphenylhydantoin (cas rn 2420-17-9) 6%
- 2933 21 00 80 5.5-dimethylhydantoin (cas rn 77-71-4) 6%
- 2933 21 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 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
- 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 4 of 6 lines
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 |
|---|---|---|---|
 China | £416k | 44.5% | -13.2% |
 United States | £311k | 33.3% | +4.7% |
 Netherlands | £108k | 11.5% | +81.2% |
 Germany | £40k | 4.2% | +118.2% |
 Italy | £26k | 2.8% | +76.9% |
 Spain | £17k | 1.8% | -55.6% |
 Belgium | £8k | 0.9% | -21.9% |
 India | £4k | 0.5% | +29.2% |
Same subheading in other tariffs
EU
TürkiyeWorld trade in 2024
Trade value (US$) no reported trade < US$42.7kUS$42.7k+US$963.1k+US$3.9m+> US$10.5m
Exports: 67
- China: US$40.9m
- United States: US$10.5m
- Taiwan: US$8.2m
- Spain: US$5.6m
- Netherlands: US$5.2m
- India: US$4.1m
- Italy: US$3.9m
- Belgium: US$3.1m
- Germany: US$3m
- Portugal: US$2.4m
- France: US$2.3m
- Israel: US$2m
- Finland: US$1.7m
- Singapore: US$1.6m
- Indonesia: US$1.4m
- Switzerland: US$963.1k
- United Kingdom: US$781.8k
- Brazil: US$669k
- Japan: US$486.4k
- Hong Kong SAR China: US$422.2k
- Austria: US$322.6k
- Canada: US$319.6k
- South Korea: US$226.1k
- Malaysia: US$175.9k
- Poland: US$122.6k
- Ukraine: US$106.9k
- Denmark: US$92.8k
- Türkiye: US$55.6k
- Thailand: US$48.8k
- Sweden: US$46.9k
- Colombia: US$42.7k
- Luxembourg: US$35.2k
- Guatemala: US$24.5k
- Uruguay: US$22.4k
- Peru: US$22.2k
- Mexico: US$20.1k
- Greece: US$19.7k
- Czechia: US$18.3k
- Lithuania: US$13.3k
- Nigeria: US$11.3k
- Bulgaria: US$9.9k
- Argentina: US$9.4k
- Dominican Republic: US$7.8k
- Serbia: US$6.9k
- Latvia: US$6.7k
- United Arab Emirates: US$3.9k
- Ireland: US$3.7k
- Australia: US$3.3k
- Croatia: US$3.3k
- Romania: US$2.7k
- South Africa: US$2.5k
- Senegal: US$1.9k
- Costa Rica: US$1.8k
- Slovenia: US$1.6k
- Russia: US$1.5k
- Slovakia: US$1.4k
- Honduras: US$800
- Hungary: US$800
- Andorra: US$600
- Belarus: US$200
Trade value (US$) no reported trade < US$77.6kUS$77.6k+US$388.6k+US$1.9m+> US$3.9m
Imports: 137
- United States: US$19.1m
- Spain: US$12m
- Japan: US$10.5m
- Germany: US$4.8m
- India: US$3.9m
- Belgium: US$3.8m
- China: US$3.4m
- Netherlands: US$3.3m
- Brazil: US$3.2m
- France: US$2.3m
- Mexico: US$2.2m
- South Korea: US$2m
- Italy: US$2m
- Türkiye: US$1.9m
- Indonesia: US$1.8m
- Finland: US$1.7m
- Colombia: US$1.5m
- Vietnam: US$1.4m
- Israel: US$1.4m
- Argentina: US$1.3m
- Thailand: US$1.3m
- Canada: US$1.2m
- United Kingdom: US$1.2m
- Poland: US$985.2k
- Taiwan: US$883.9k
- Malaysia: US$625.6k
- South Africa: US$600.3k
- Sweden: US$529.1k
- Russia: US$524.4k
- Austria: US$514.5k
- Slovenia: US$505.9k
- United Arab Emirates: US$449.4k
- Romania: US$401.2k
- Australia: US$388.6k
- Philippines: US$385.3k
- Peru: US$370.6k
- Egypt: US$356.4k
- Uruguay: US$345k
- Costa Rica: US$334.7k
- Singapore: US$302.9k
- Chile: US$290.1k
- Bangladesh: US$242.6k
- Denmark: US$233.5k
- Switzerland: US$222.5k
- Côte d’Ivoire: US$219.1k
- Paraguay: US$218.1k
- Nigeria: US$191.9k
- Hungary: US$191.8k
- Hong Kong SAR China: US$183.2k
- Ecuador: US$182.5k
- Pakistan: US$180.4k
- New Zealand: US$177.2k
- Ireland: US$152.5k
- Guatemala: US$151.6k
- Dominican Republic: US$148.7k
- Czechia: US$120.9k
- Sri Lanka: US$114.6k
- Greece: US$105.3k
- Tunisia: US$100.5k
- Portugal: US$98.3k
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | China | US$40.9m | 40.5% |
| 2 | United States | US$10.5m | 10.4% |
| 3 |  Taiwan | US$8.2m | 8.1% |
| 4 | Spain | US$5.6m | 5.6% |
| 5 | Netherlands | US$5.2m | 5.2% |
| 6 | India | US$4.1m | 4.1% |
| 7 | Italy | US$3.9m | 3.8% |
| 8 | Belgium | US$3.1m | 3% |
| 9 | Germany | US$3m | 3% |
| 10 |  Portugal | US$2.4m | 2.4% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | United States | US$19.1m | 18.9% |
| 2 | Spain | US$12m | 11.8% |
| 3 |  Japan | US$10.5m | 10.4% |
| 4 | Germany | US$4.8m | 4.7% |
| 5 | India | US$3.9m | 3.9% |
| 6 | Belgium | US$3.8m | 3.8% |
| 7 | China | US$3.4m | 3.4% |
| 8 | Netherlands | US$3.3m | 3.3% |
| 9 |  Brazil | US$3.2m | 3.2% |
| 10 |  France | US$2.3m | 2.3% |
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
The UK Global Tariff divides subheading 2933.21 into 6 tariff lines; the duty is between 0% and 6% (average 5%). 1 of them is duty-free.
Subheading 2933.21 is a single line in the EU Combined Nomenclature, where the duty is 6.5%.
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 Free – 6%.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
Imports of these goods into the UK came to £935.1k between September 2025 and August 2026 (down 7% on the year before); China supplied 45%, followed by United States.
In 2024, countries exported these goods worth US$101.2m (+0.9% year on year).
The largest exporter was China (US$40.9m), followed by the United States.
Questions and answers
What is the HS code for hydantoin and its derivatives?
Hydantoin and its derivatives fall under HS subheading 2933.21, part of heading 2933, in section VI of the Harmonized System.
What is the import duty on hydantoin and its derivatives in the UK?
Under the UK Global Tariff, imports under 2933.21 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 hydantoin and its derivatives in the EU?
Under the EU Combined Nomenclature, imports under 2933.21 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 hydantoin and its derivatives?
China, with US$40.9m in 2024 (40.5% 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 Free – 6% applies. Pick a country above to see its rate.
Is there anti-dumping duty on these goods?
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 these goods from?
In the 12 months to August 2026, the largest suppliers were China (45%), United States (33%) and Netherlands (12%), out of total imports of £935.1k.