Subheading · Chapter 29 · Heading 2933

2933.99

2933.99: Heterocyclic compounds with nitrogen hetero-atom(s) only: other, other

Other nitrogen heterocyclic compounds

Official description Other

2933.99 is the HS subheading for other nitrogen heterocyclic compounds, under heading 2933 in chapter 29.

What you pay

Importing into UK

Customs duty Free standard rate · across 71 national lines depends on the country of origin
Additional duties and charges 4 additional measures Import requirements: 4
VAT 20.00 % import VAT
Duty calculatorCalculate duty and taxes →

Rates by national line · UK Global Tariff

UK lines →
  1. 2933 99 00 00 Other
  2. 2933 99 20 00 Indole, 3-methylindole (skatole), 6-allyl-6.7-dihydro-5h-dibenz[c,e]azepine (azapetine), phenindamine (inn) and their salts; imipramine hydrochloride (innm) Free
  3. 2933 99 50 00 2.4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol Free
  4. 2933 99 80 00 Other
  5. 2933 99 80 01 3-cyanoindole (cas rn 5457-28-3) with a purity by weight of 98% or more Free
  6. 2933 99 80 02 (s)-1-benzyl-3-pyrrolidinol (cas rn 101385-90-4) with a purity by weight of 98% or more Free
  7. 2933 99 80 03 Tert-butyl 4-formyl-5-methoxy-7-methyl-1h-indole-1-carboxylate (cas rn 1481631-51-9) with a purity by weight of 97% or more Free
  8. 2933 99 80 04 (s)-2.5-dihydro-pyrrole-1.2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester (cas rn 74844-93-2) with a purity by weight of 97% or more Free
  9. 2933 99 80 05 1.4,7.10-tetraazacyclododecane (cas rn 294-90-6) with a purity by weight of 96% or more Free
  10. 2933 99 80 07 4-(2-oxo-2.3-dihydro-1h-benzimidazol-1-yl)butanoic acid (cas rn 3273-68-5) with a purity by weight of 98% or more Free
  11. 2933 99 80 08 Prothioconazole (iso) (cas rn 178928-70-6) with a purity by weight of 98% or more Free
  12. 2933 99 80 09 5.7-difluoro-2-(4-fluorophenyl)-1h-indole (cas rn 901188-04-3) with a purity by weight of 98% or more Free
  13. 2933 99 80 10 (r)-2-(2.5-difluorophenyl)pyrrolidine hydrochloride (cas rn 1218935-60-4) with a purity by weight of 98% or more Free
  14. 2933 99 80 13 5-difluormethoxy-2-mercapto-1-h-benzimidazole (cas rn 97963-62-7) Free
  15. 2933 99 80 16 Pyridate (iso)(cas rn 55512-33-9) with a purity by weight of 90% or more Free
  16. 2933 99 80 18 2-(2-ethoxyphenyl)-5-methyl-7-propylimidazolo[5.1-f][1.2,4]-triazin-4(3h)-one (cas rn 224789-21-3) with a purity by weight of 95% or more Free
  17. 2933 99 80 21 1-(bis(dimethylamino)methylene)-1h-[1.2,3]triazolo[4.5-b]pyridinium 3-oxide hexafluorophosphate(v) (cas rn 148893-10-1) Free
  18. 2933 99 80 22 Dibenz[b,f]azepine-5-carbonyl chloride (cas rn 33948-22-0) with a purity by weight of 98% or more Free
  19. 2933 99 80 23 Tebuconazole (iso) (cas rn 107534-96-3) with a purity by weight of 95% or more Free
  20. 2933 99 80 24 1.3-dihydro-5.6-diamino-2h-benzimidazol-2-one (cas rn 55621-49-3) Free
  21. 2933 99 80 25 6-(4-benzylamino-3-nitrophenyl)-5-methyl-4.5-dihydro-2h-pyridazin-3-one (cas rn 77469-62-6) with a purity by weight of 95% or more Free
  22. 2933 99 80 26 Benzotriazole-1-yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate (cas rn 128625-52-5) with a purity by weight of 97% or more Free
  23. 2933 99 80 27 5.6-dimethylbenzimidazole (cas rn 582-60-5) Free
  24. 2933 99 80 28 7-(2-methyl-4-nitrophenoxy)-[1.2,4]triazolo[1.5-a]pyridine (cas rn 937263-44-0) with a purity by weight of 98% or more Free
  25. 2933 99 80 29 1.1-dimethylethyl (4s)-3-amino-2-(4-fluoro-3.5-dimethylphenyl)-2.4,6.7-tetrahydro-4-methyl-5h-pyrazolo[4.3-c]pyridine-5-carboxylate (cas rn 2212021-59-3) with a purity by weight of 99% or more Free
  26. 2933 99 80 30 Quizalofop-p-ethyl (iso) (cas rn 100646-51-3) Free
  27. 2933 99 80 31 2-(2h-benzotriazol-2-yl)-6-(2-phenylpropan-2-yl)-4-(2.4,4-trimethylpentan-2-yl)phenol (cas rn 73936-91-1) with a purity by weight of 97% or more Free
  28. 2933 99 80 32 1h-1.2,3-triazole (cas rn 288-36-8) or 2h-1.2,3-triazole (cas rn 288-35-7) with a purity by weight of 99% or more Free
  29. 2933 99 80 33 Penconazole (iso) (cas rn 66246-88-6) Free
  30. 2933 99 80 34 2.4-dihydro-5-methoxy-4-methyl-3h-1.2,4-triazol-3-on (cas rn 135302-13-5) Free
  31. 2933 99 80 35 2-[6-methyl-2-(4-methylphenyl)imidazo[1.2-a]pyridin-3-yl]acetic acid (cas rn 189005-44-5) with a purity by weight of 98% or more Free
  32. 2933 99 80 37 8-chloro-5.10-dihydro-11h-dibenzo [b,e] [1.4]diazepin-11-one (cas rn 50892-62-1) Free
  33. 2933 99 80 38 (4as,7as)-octahydro-1h-pyrrolo[3.4-b]pyridine (cas rn 151213-40-0) Free
  34. 2933 99 80 40 Trans-4-hydroxy-l-proline (cas rn 51-35-4) Free
  35. 2933 99 80 41 5-[4'-(bromomethyl)biphenyl-2-yl]-1-trityl-1h-tetrazole (cas rn 124750-51-2) Free
  36. 2933 99 80 42 (s)-2.2,4-trimethylpyrrolidine hydrochloride (cas rn 1897428-40-8) Free
  37. 2933 99 80 43 4-([1.2,4]triazolo[1.5-a]pyridin-7-yloxy)-3-methylaniline (cas rn 937263-71-3) with a purity by weight of 98% or more Free
  38. 2933 99 80 44 (2r,3r)-2-(2.4-difluorophenyl)-1-(1h-1.2,4-triazol-1-yl)butane-2.3-diol methanesulfonate (cas rn 1175536-50-1) with a purity by weight of 98% or more Free
  39. 2933 99 80 46 (s)-indoline-2-carboxylic acid (cas rn 79815-20-6) Free
  40. 2933 99 80 48 5-amino-6-methyl-2-benzimidazolone (cas rn 67014-36-2) Free
  41. 2933 99 80 49 Tert-butyl (2s)-2-carbamoylpyrrolidine-1-carboxylate (cas rn 35150-07-3) with a purity by weight of 97% or more Free
  42. 2933 99 80 50 Tert-butyl (3r)-3-aminopyrrolidine-1-carboxylate (cas rn 147081-49-0) with a purity by weight of 97% or more Free
  43. 2933 99 80 51 (1r,5r)-ethyl 3-benzyl-3-azabicyclo[3.1.0]hexane-1-carboxylate hydrochloride (cas rn 2914217-81-3) with a purity by weight of 97% or more Free
  44. 2933 99 80 52 (s)-2-methylpyrrolidine-2-carboxylic acid hydrochloride (cas rn 1508261-86-6) with a purity by weight of 98% or more Free
  45. 2933 99 80 55 Pyridaben (iso) (cas rn 96489-71-3) Free
  46. 2933 99 80 56 Methyl 3.5-diamino-6-chloropyrazine-2-carboxylate (cas rn 1458-01-1) Free
  47. 2933 99 80 57 2-(5-methoxyindol-3-yl)ethylamine (cas rn 608-07-1) Free
  48. 2933 99 80 60 2-[(6.11-dihydro-5h-dibenz[b,e]azepin-6-yl)-methyl]-1h-isoindole-1.3(2h)-dione (cas rn 143878-20-0) with a purity by weight of 99% or more Free
  49. 2933 99 80 61 (1r,5s)-8-benzyl-8-azabicyclo(3.2.1)octan-3-one hydrochloride (cas rn 83393-23-1) Free
  50. 2933 99 80 62 6-o-tert-butyl 4a-o-methyl (4a)-1-(4-fluorophenyl)-4.5,7.8-tetrahydropyrazolo[3.4-g]isoquinoline-4a,6-dicarboxylate (cas rn 864972-21-4) with a purity by weight of 95% or more Free
  51. 2933 99 80 63 L-prolinamide (cas rn 7531-52-4) Free
  52. 2933 99 80 64 (1r,2s,5s)-3-[(s)-3.3-dimethyl-2-(2.2,2-trifluoroacetamido)butanoyl]-6.6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylic acid (cas rn 2755812-45-2) with a purity by weight of 95% or more Free
  53. 2933 99 80 65 2-(2h-benzotriazol-2-yl)-4.6-bis(1-methyl-1-phenylethyl)phenol (cas rn 70321-86-7) with a purity by weight of 99% or more Free
  54. 2933 99 80 67 Candesartan ethyl ester (innm), (cas rn 139481-58-6) Free
  55. 2933 99 80 68 5-((1s,2s)-2-((2r,6s,9s,11r,12r,14as,15s,16s,20r,23s,25ar)-9-amino-20-((r)-3-amino-1-hydroxy-3-oxopropyl)-2.11.12.15-tetrahydroxy-6-((r)-1-hydroxyethyl)-16-methyl-5.8,14.19.22.25-hexaoxotetracosahydro-1h-dipyrrolo[2.1-c:2',1'-l][1.4,7.10.13.16]hexaazacyclohenicosin-23-yl)-1.2-dihydroxyethyl)-2-hydroxyphenyl hydrogen sulphate (cas rn 168110-44-9) Free
  56. 2933 99 80 70 5-(bis-(2-hydroxyethyl)-amino)-1-methyl-1h-benzimidazole-2-butanoic acid ethyl ester (cas rn 3543-74-6) with a purity by weight of 98% or more Free
  57. 2933 99 80 71 10-methoxyiminostilbene (cas rn 4698-11-7) Free
  58. 2933 99 80 72 1.4,7-trimethyl-1.4,7-triazacyclononane (cas rn 96556-05-7) Free
  59. 2933 99 80 73 5-(acetoacetylamino)benzimidazolone (cas rn 26576-46-5) Free
  60. 2933 99 80 74 N,n-dimethyl-n-octadecyl-1-octadecanaminium (sp-4-2)-[29h,31h-phthalocyanine-2-sulfonato-n29,n30,n31,n32]cuprate (cas rn 70750-63-9) with a purity by weight of 90% or more Free
  61. 2933 99 80 75 1-[bis(dimethylamino)methylene]-1h-benzotriazolium hexafluorophosphate(1-) 3-oxide (cas rn 94790-37-1)​ Free
  62. 2933 99 80 76 2-methylindoline (cas rn 6872-06-6) with a purity by weight of 98% or more Free
  63. 2933 99 80 78 3-amino-3-azabicyclo (3.3.0) octane hydrochloride (cas rn 58108-05-7) Free
  64. 2933 99 80 79 2-(2h-benzotriazol- 2-yl)-4.6-di-tert-pentylphenol (uv-328) – ( cas no 25973-55-1) Free
  65. 2933 99 80 80 Pyrrole-2-carboxaldehyde (cas rn 1003-29-8) with a purity by weight of 97% or more Free
  66. 2933 99 80 81 1.2,3-benzotriazole (cas rn 95-14-7) Free
  67. 2933 99 80 82 Tolytriazole (cas rn 29385-43-1) Free
  68. 2933 99 80 83 1-(3-chloropropyl)-1.3-dihydro-2h-benzimidazol-2-one (cas rn 62780-89-6) with a purity by weight of 97% or more Free
  69. 2933 99 80 84 Allyl (2s,4s)-4-benzoylsulfanyl-2-(dimethylcarbamoyl)pyrrolidine-1-carboxylate (cas rn 141818-73-7) with a purity by weight of 96% or more Free
  70. 2933 99 80 85 2-benzotriazol-2-yl-4.6-di-tert-butylphenol (uv-320) (cas rn 3846-71-7) Free
  71. 2933 99 80 86 2-(2h-benzotriazol-2-yl)-4-(tert-butyl)-6- (sec-butyl)phenol (uv-350) (cas rn 36437-37-3) Free
  72. 2933 99 80 87 Carfentrazone-ethyl (isom) (cas rn 128639-02-1) with a purity by weight of 90% or more Free
  73. 2933 99 80 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
    Documents
    • 9Y12
    Tariff lines
    on 2 of 71 lines

Import requirements 4

  • Prohibition or restrictionImport prohibition
    Applies to goods from
    North Korea
    Legal act
    S.I. 2019/411
    Tariff lines
    on 69 of 71 lines
  • Import controlRestriction on entry into free circulation
    Applies to goods from
    Russia, Syria, Ukraine
    Legal act
    2023 No. 440, S.I. 2022/395, S.I. 2019/792
    Documents
    • 9011
    • 9022
    • 9038
    • 9009
    • 9010
    • 9017
  • Import controlImport control on restricted goods and technologies
    Applies to goods from
    Iran, Libya, North Korea, Russia
    Legal act
    S.I. 2019/461, S.I. 2019/411, 2020 No. 1665, S.I. 2019/855
    Documents
    • Y966 Goods other than those described in the MG footnotes linked to the measure (Missile Technology Control Regime list - Annex III of Reg. (EU) 267/2012)
    • Y920 Goods other than those described in the footnotes linked to the measure
    Tariff lines
    on 69 of 71 lines
  • Import controlHome Office Controlled Drugs (import)
    Applies to goods from
    all countries
    Legal act
    2001 No. 3998
    Documents
    • 9113
    • 913Y
    Tariff lines
    on 2 of 71 lines

Preferential rates by country

Agreement or schemeCountriesRate
standard rate (no agreement)—Free
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£224.7m-4.7% · previous 12 months
Average import price£43.70 per kg
Jan 2024: £21.2mFeb 2024: £4.6mMar 2024: £5.2mApr 2024: £7.1mMay 2024: £4.3mJun 2024: £9.3mJul 2024: £7mAug 2024: £4.5mSept 2024: £80.6mOct 2024: £8.3mNov 2024: £32.9mDec 2024: £4.9mJan 2025: £6mFeb 2025: £14.1mMar 2025: £7.7mApr 2025: £4.6mMay 2025: £13.5mJun 2025: £44mJul 2025: £9.3mAug 2025: £9.9mSept 2025: £9.5mOct 2025: £6.9mNov 2025: £17.7mDec 2025: £9.5mJan 2026: £6.3mFeb 2026: £8.7mMar 2026: £6.2mApr 2026: £25.1mMay 2026: £8.4mJun 2026: £108.3mJul 2026: £11.5mAug 2026: £6.5m 202420252026
Data up to August 2026 (provisional) · Monthly data: Eurostat Comext (CC BY 4.0), HMRC (OGL v3.0)

Main suppliers, last 12 months

CountryValueShareChange
Ireland £113.3m 50.4% -18.3%
China £37.6m 16.7% +12.3%
India £27.9m 12.4% +98.6%
Switzerland £7.3m 3.2% +8.2%
United States £6.8m 3% -43.9%
Italy £6.5m 2.9% +30.1%
South Korea £6.1m 2.7% +21.1%
Japan £3.8m 1.7% +358%

Same subheading in other tariffs

EU Free – 6.5% Third-country duty 3 tariff lines · average 4% Türkiye Free – 6.5% Third-country duty 31 tariff lines · average 6.1% USA Free – 6.5% General (MFN) 29 tariff lines · average 4%

World trade in 2024

2933.99 · US$14.5bn

Trade value (US$) no reported trade < US$969.9kUS$969.9k+US$17.4m+US$286m+> US$1.4bn

Exports: 113
  1. China: US$4.3bn
  2. Switzerland: US$2.3bn
  3. India: US$1.6bn
  4. Ireland: US$1.4bn
  5. Germany: US$893.9m
  6. South Korea: US$533.7m
  7. Italy: US$531.7m
  8. United States: US$496.1m
  9. France: US$390.9m
  10. Japan: US$294.3m
  11. Indonesia: US$286m
  12. Hong Kong SAR China: US$258.5m
  13. Belgium: US$226.5m
  14. Netherlands: US$184.7m
  15. Spain: US$162.7m
  16. United Kingdom: US$155.6m
  17. Brazil: US$87.1m
  18. Austria: US$70.4m
  19. Israel: US$65.1m
  20. Mexico: US$52.9m
  21. Taiwan: US$43.9m
  22. Hungary: US$37.8m
  23. Slovenia: US$36m
  24. Canada: US$23.7m
  25. Serbia: US$23m
  26. Sweden: US$17.4m
  27. Poland: US$16.7m
  28. Czechia: US$14.9m
  29. Denmark: US$14.4m
  30. Singapore: US$11.8m
  31. Ukraine: US$10.2m
  32. Finland: US$7.8m
  33. Slovakia: US$6.3m
  34. Portugal: US$5.6m
  35. Saudi Arabia: US$4.4m
  36. United Arab Emirates: US$4.3m
  37. Argentina: US$3m
  38. Latvia: US$2.8m
  39. Bulgaria: US$2.5m
  40. Croatia: US$2.1m
  41. Thailand: US$2m
  42. Russia: US$2m
  43. Côte d’Ivoire: US$1.9m
  44. South Africa: US$1.8m
  45. Türkiye: US$1.8m
  46. Lithuania: US$1.6m
  47. Australia: US$1.4m
  48. Luxembourg: US$1.3m
  49. Greece: US$1.3m
  50. Cyprus: US$1.2m
  51. Malta: US$969.9k
  52. Vietnam: US$927.9k
  53. Costa Rica: US$901.2k
  54. Seychelles: US$853.2k
  55. Malaysia: US$609.8k
  56. Estonia: US$512.6k
  57. Guatemala: US$496.8k
  58. Belize: US$450.2k
  59. New Zealand: US$352.5k
  60. Colombia: US$340.2k

Top exporters

RankCountryValueShare
1 China US$4.3bn 29.3%
2 Switzerland US$2.3bn 15.5%
3 India US$1.6bn 11.1%
4 Ireland US$1.4bn 9.7%
5 Germany US$893.9m 6.2%
6 South Korea US$533.7m 3.7%
7 Italy US$531.7m 3.7%
8 United States US$496.1m 3.4%
9 France US$390.9m 2.7%
10 Japan US$294.3m 2%

Top importers

RankCountryValueShare
1 United States US$1.4bn 9.8%
2 Switzerland US$1bn 7%
3 Brazil US$994.2m 6.8%
4 Slovenia US$982.8m 6.8%
5 China US$870.9m 6%
6 India US$713m 4.9%
7 Germany US$692m 4.8%
8 Ireland US$595.6m 4.1%
9 Spain US$493m 3.4%
10 Italy US$484m 3.3%

Binding rulings for similar goods 21

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.

  • N357994 U.S. CBP 4 September 2026 · 2933.99.79.00

    The tariff classification of Thymosin beta-4 and BPC-157 from China

  • N342846 U.S. CBP 11 October 2024 · 2933.99.75.00

    The tariff classification of Selumetinib Sulfate (CAS No. 943332-08-9) in bulk powder form, from Taiwan

  • N335403 U.S. CBP 11 October 2023 · 2933.99.75.00

    The tariff classification of Bendamustine Hydrochloride (CAS No. 3543-75-7) in bulk powder form, from India

  • N335370 U.S. CBP 4 October 2023 · 2933.99.75.00

    The tariff classification of Selumetinib Sulfate (CAS No. 943332-08-9) in bulk crystal form, from Taiwan

  • N325831 U.S. CBP 6 May 2022 · 2933.99.97.01

    The tariff classification of Pyrrole (CAS # 109-97-7) from China

  • N320903 U.S. CBP 20 October 2021 · 2933.99.79.00

    The tariff classification of laboratory reference standards for analytical testing from France

21 rulings in total for this code

In the UK Global Tariff, subheading 2933.99 covers 71 tariff lines and the duty is duty-free.

The EU Combined Nomenclature divides subheading 2933.99 into 3 tariff lines; the duty is between 0% and 6.5% (average 4%). 1 of them is duty-free.

Goods from 174 countries can enter the UK at a preferential rate instead of the standard Free; 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 nitrogen heterocyclic compounds worth £224.7m (down 5% on the year before), at an average of £43.70 per kg; Ireland supplied 50%, followed by China.

World trade in other nitrogen heterocyclic compounds reached US$14.5bn in 2024, down 24.9% on 2023.

China was the largest exporter with 29.3% of the total, ahead of Switzerland.

Questions and answers

What is the HS code for heterocyclic compounds with nitrogen hetero-atom(s) only: other, other?

Heterocyclic compounds with nitrogen hetero-atom(s) only: other, other fall under HS subheading 2933.99, 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 2933.99 from countries without a preferential agreement are free of duty. 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 2933.99 from countries without a preferential agreement are charged at 0% to 6.5%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.

Which country exports the most heterocyclic compounds with nitrogen hetero-atom?

China, with US$4.3bn in 2024 (29.3% of world exports).

Which countries can export other nitrogen heterocyclic compounds 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 applies. Pick a country above to see its rate.

Is there anti-dumping duty on other nitrogen heterocyclic compounds?

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 nitrogen heterocyclic compounds from?

In the 12 months to August 2026, the largest suppliers were Ireland (50%), China (17%) and India (12%), out of total imports of £224.7m.