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% Canada Free General (MFN) 4 tariff lines Mexico Free – 5% General (MFN) 19 tariff lines · average 0.8% Brazil Free – 12.6% General (MFN) 36 tariff lines · average 4.1% Argentina Free – 12.6% General (MFN) 84 tariff lines · average 1.9% Peru Free General (MFN) 4 tariff lines New Zealand Free General (MFN) 3 tariff lines Japan 3.1% – 3.3% General (MFN) 2 tariff lines · average 3.2% Taiwan Free – 5% General (MFN) 22 tariff lines · average 4.7% GCC 5% General (MFN) 6 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia Free – 5% General (MFN) 4 tariff lines · average 2.5% Nigeria 5% General (MFN) 1 tariff line

World trade in 2024

2933.99 · US$14.5bn

Trade value (US$) no reported trade < US$970kUS$970k+US$17m+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$894m
  6. South Korea: US$534m
  7. Italy: US$532m
  8. United States: US$496m
  9. France: US$391m
  10. Japan: US$294m
  11. Indonesia: US$286m
  12. Hong Kong SAR China: US$259m
  13. Belgium: US$227m
  14. Netherlands: US$185m
  15. Spain: US$163m
  16. United Kingdom: US$156m
  17. Brazil: US$87m
  18. Austria: US$70m
  19. Israel: US$65m
  20. Mexico: US$53m
  21. Taiwan: US$44m
  22. Hungary: US$38m
  23. Slovenia: US$36m
  24. Canada: US$24m
  25. Serbia: US$23m
  26. Sweden: US$17m
  27. Poland: US$17m
  28. Czechia: US$15m
  29. Denmark: US$14m
  30. Singapore: US$12m
  31. Ukraine: US$10m
  32. Finland: US$8m
  33. Slovakia: US$6m
  34. Portugal: US$6m
  35. Saudi Arabia: US$4m
  36. United Arab Emirates: US$4m
  37. Argentina: US$3m
  38. Latvia: US$3m
  39. Bulgaria: US$2m
  40. Croatia: US$2m
  41. Thailand: US$2m
  42. Russia: US$2m
  43. Côte d’Ivoire: US$2m
  44. South Africa: US$2m
  45. Türkiye: US$2m
  46. Lithuania: US$2m
  47. Australia: US$1m
  48. Luxembourg: US$1m
  49. Greece: US$1m
  50. Cyprus: US$1m
  51. Malta: US$970k
  52. Vietnam: US$928k
  53. Costa Rica: US$901k
  54. Seychelles: US$853k
  55. Malaysia: US$610k
  56. Estonia: US$513k
  57. Guatemala: US$497k
  58. Belize: US$450k
  59. New Zealand: US$353k
  60. Colombia: US$340k

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$894m 6.2%
6 South Korea US$534m 3.7%
7 Italy US$532m 3.7%
8 United States US$496m 3.4%
9 France US$391m 2.7%
10 Japan US$294m 2%

Top importers

RankCountryValueShare
1 United States US$1.4bn 9.8%
2 Switzerland US$1bn 7%
3 Brazil US$994m 6.8%
4 Slovenia US$983m 6.8%
5 China US$871m 6%
6 India US$713m 4.9%
7 Germany US$692m 4.8%
8 Ireland US$596m 4.1%
9 Spain US$493m 3.4%
10 Italy US$484m 3.3%

Import duty on this product around the world 164

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.

  • 4%median duty
  • 62number of duty-free countries (MFN)
  • 45%highest: Bahamas, Bermuda, Cayman Islands

164

Importing countryMFN dutylines from – todata 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 5.6% 2% – 14% 2023 · HS 2017
Armenia 1.5% 0% – 3% 2023
Aruba 6% 2021 · HS 2012
Australia 0% 2023
Azerbaijan 0% 2023 · HS 2017
Bahamas 45% 2022
Bahrain 5% 2023
Bangladesh 0% 2023 · HS 2017
Barbados 5% 2022 · HS 2017
Belarus 1.5% 0% – 3% 2021 · HS 2017
Belize 5% 2023
Benin 5% 2023
Bermuda 25% 2023
Bhutan 10% 2022
Bolivia 5% 2023 · HS 2017
Bosnia & Herzegovina 0% 2022
Botswana 0% 2023
Brazil 5.6% 2% – 14% 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 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 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) 4% 0% – 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 2.5% 0% – 5% 2023
Iran 8.8% 5% – 26% 2020 · HS 2017
Israel 0% 2022 · HS 2017
Jamaica 0% 2023
Japan 1.6% 1.6% – 1.7% 2023
Jordan 0% 2023
Kazakhstan 1.5% 0% – 3% 2023
Kenya 0% 2023
Kiribati 0% 2023 · HS 2002
Kuwait 5% 2023
Kyrgyzstan 1.5% 0% – 3% 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 3.8% 0% – 5% 2023 · HS 2017
Micronesia 4% 2021 · HS 2017
Moldova 0% 2023 · HS 2017
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 2.5% 0% – 5% 2023
Norway 0% 2023
Oman 5% 2023
Pakistan 5.5% 0% – 11% 2023
Palau 3% 2023 · HS 2012
Palestinian Territories 0% 2017 · HS 2017
Panama 0% 2023
Papua New Guinea 0% 2023
Paraguay 5% 0% – 14% 2023 · HS 2017
Peru 0% 2023 · HS 2017
Philippines 1% 2023
Qatar 5% 2023
Russia 1.5% 0% – 3% 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 5% 2% – 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 4.8% 0% – 6.5% 2023
Tuvalu 0% 2017 · HS 2017
Uganda 0% 2023
Ukraine 0% 2023 · HS 2017
United Arab Emirates 5% 2023
United Kingdom 0% 2023
United States 4% 0% – 6.5% 2023
Uruguay 5.6% 2% – 14% 2023 · HS 2017
Uzbekistan 0% 2021 · HS 2017
Vanuatu 5% 2023
Venezuela 5.6% 2% – 14% 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
51577 Other heterocyclic compounds with nitrogen hetero-atom(s) only
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

HSCode
20172933.99unchanged
20122933.99changed
20072933.99changed
20022933.99changed
19962933.90changed
19922933.90changed

Correspondence tables of the United Nations Statistics Division (UNSD)

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

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. US Tariff change

    Guidance and Procedures for Implementing Tariff Adjustments for Specialty Pharmaceuticals and Associated Pharmaceutical Ingredients and Technical Corrections to the Harmonized Tariff Schedule of the United States for Duties Imposed Under Proclamation 11020

    FR Doc. 2026-19498 · 91 FR 60360 · Source: federalregister.gov

  2. US Anti-dumping

    Certain Corrosion Inhibitors From the People's Republic of China: Continuation of Antidumping Duty and Countervailing Duty Orders

    FR Doc. 2026-16052 · 91 FR 50758 · Source: federalregister.gov

  3. US Import and export controls

    Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

    FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov

  4. TR Tariff change

    İthalat Rejimi Kararında Değişiklik Yapılmasına İlişkin Karar (Karar Sayısı: 11485)

    RG 01.07.2026 sayı 33297 · Karar 11485 · Source: resmigazete.gov.tr

  5. EU Suspension · Applies from:

    Council Regulation (EU) 2026/1463 of 25 June 2026 amending Regulation (EU) 2021/2278 suspending the Common Customs Tariff duties referred to in Article 56(2), point (c), of Regulation (EU) No 952/2013 of the European Parliament and of the Council on certain agricultural and industrial products

    CELEX 32026R1463 · Source: eur-lex.europa.eu

  6. EU Quota · Applies from:

    Council Regulation (EU) 2026/1465 of 25 June 2026 amending Regulation (EU) 2021/2283 opening and providing for the management of autonomous tariff quotas of the Union for certain agricultural and industrial products

    CELEX 32026R1465 · Source: eur-lex.europa.eu

  7. GB Other

    Update to Commodity Code structure to maintain dynamic alignment with the EU – 30 June 2026

    Trade Tariff news 6995 · Source: trade-tariff.service.gov.uk

  8. US Tariff change

    Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

    FR Doc. 2026-11158 · 91 FR 33854 · Source: federalregister.gov

Rule changes →

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.

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