Subheading · Chapter 29 · Heading 2934

2934.99

2934.99: Nucleic acids and their salts, whether or not chemically: other, other

Other heterocyclic compounds

Official description Other

2934.99 is the HS subheading for other heterocyclic compounds, under heading 2934 in chapter 29.

What you pay

Importing into UK

Customs duty Free – 6% standard rate · across 70 national lines depends on the country of origin
Additional duties and charges 3 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. 2934 99 00 00 Other
  2. 2934 99 60 00 Chlorprothixene (inn); thenalidine (inn) and its tartrates and maleates; furazolidone (inn); 7-aminocephalosporanic acid; salts and esters of (6r,7r)-3-acetoxymethyl-7-[(r)-2-formyloxy-2-phenylacetamido]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; 1-[2-(1.3-dioxan-2-yl)ethyl]-2-methylpyridinium bromide Free
  3. 2934 99 90 00 Other
  4. 2934 99 90 04 Silthiofam (iso) (cas rn 175217-20-6) with a purity by weight of 98% or more 6%
  5. 2934 99 90 05 (s)-2-methyl-1-(6-nitropyridin-3-yl)-4-(oxetan-3-yl)piperazine (cas rn 1895867-67-0) with a purity by weight of 97% or more 6%
  6. 2934 99 90 06 Cis-[2-(2.4-dichlorodiphenyl)-2-(1h-imidazol-1-ylmethyl)-1.3-dioxolan-4yl]methyl-4-methylbenzenesulfonate (cas rn 134071-44-6) with a purity by weight of 99% or more 6%
  7. 2934 99 90 07 Cedazuridine (inn) (cas rn 1141397-80-9) with a purity by weight of 99% or more 6%
  8. 2934 99 90 08 (r)-tert-butyl 2-(6-(5-chloro-2-((tetrahydro-2h-pyran-4-yl)amino)pyrimidin-4-yl)-1-oxoisoindolin-2-yl)propanoate (cas rn 2095665-45-3) with a purity by weight of 98% or more 6%
  9. 2934 99 90 09 3-[2-{(2r,3s)-3-[(1r)-1-{[tert-butyl(dimethyl)silyl]oxy}ethyl]-4-oxoazetidin-2-yl}propanoyl]-4.4-dimethyl-1.3-oxazolidin-2-one (isomeric mixture of cas rns 114341-89-8 and 114418-63-2) with a purity by weight of 99% or more 6%
  10. 2934 99 90 10 Fluralaner (inn) (cas rn 864731-61-3) 6%
  11. 2934 99 90 11 Aqueous solution of d(p-thio)(t-g-a-c-t-g-t-g-a-a-c-g-t-t-c-g-a-g-a-t-g-a) deoxyribonucleic acid (cas rn 937402-51-2), containing by weight 15% or more, but not more than 25% of oligodeoxynucleotide 6%
  12. 2934 99 90 12 Dimethomorph (iso) (cas rn 110488-70-5) 6%
  13. 2934 99 90 13 (6s)-6-methyl-5.6-dihydro-4h-thieno[2.3-b]thiopyran4-one-7.7-dioxide (cas rn 148719-91-9) with a purity by weight of 98% or more 6%
  14. 2934 99 90 14 2-mercaptoadenosine (cas rn 43157-50-2) with a purity by weight of 98% or more 6%
  15. 2934 99 90 16 Difenoconazole (iso) (cas rn 119446-68-3) 6%
  16. 2934 99 90 17 (s)-4-(tert-butoxycarbonyl)-1.4-oxazepane-2-carboxylic acid (cas rn 1273567-44-4) with a purity by weight of 95% or more 6%
  17. 2934 99 90 18 Methyl (1r,3r)-1-(1.3-benzodioxol-5-yl)-2-(2-chloroacetyl)-1.3,4.9-tetrahydropyrido[5.4-b]indole-3-carboxylate (cas rn 171489-59-1) with a purity by weight of 99% or more 6%
  18. 2934 99 90 19 (4r,6s)-6-methyl-7.7-dioxo-5.6-dihydro-4h-thieno[2.3-b]thiopyran-4-ol (cas rn 147128-77-6) with a purity by weight of 94% or more 6%
  19. 2934 99 90 20 Thiophene (cas rn 110-02-1) 6%
  20. 2934 99 90 21 Acesulfame potassium (potassium salt of 6-methyl-1.2,3-oxathiazin-4(3h)-one 2.2-dioxide; cas rn 55589-62-3) ace-k Free
  21. 2934 99 90 22 4-(oxiran-2-ylmethoxy)-9h-carbazole (cas rn 51997-51-4) with a purity by weight of 97% or more 6%
  22. 2934 99 90 24 Flufenacet (iso) (cas rn 142459-58-3) with a purity by weight of 95% or more 6%
  23. 2934 99 90 26 4-methylmorpholine 4-oxide in an aqueous solution (cas rn 7529-22-8) 6%
  24. 2934 99 90 27 2-(4-hydroxyphenyl)-1-benzothiophene-6-ol (cas rn 63676-22-2) 6%
  25. 2934 99 90 28 11-(piperazin-1-yl)dibenzo[b,f][1.4]thiazepine dihydrochloride (cas rn 111974-74-4) 6%
  26. 2934 99 90 30 Dibenzo[b,f][1.4]thiazepin-11(10h)-one (cas rn 3159-07-7) 6%
  27. 2934 99 90 31 Thenoic acid (cas rn 1918-77-0) with a purity by weight of 97% or more 6%
  28. 2934 99 90 32 (6r,7r)-benzhydryl 3-hydroxy-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate (cas rn 54639-48-4) with a purity by weight of 95% or more 6%
  29. 2934 99 90 34 Benzyl 4-(oxetan-3-yl)piperazine-1-carboxylate (cas rn 1254115-22-4) with a purity by weight of 99% or more 6%
  30. 2934 99 90 35 Nusinersen sodium (innm) (cas rn 1258984-36-9) with a purity by weight of 95% or more 6%
  31. 2934 99 90 36 Nadide phosphate (innm) disodium salt (cas rn 24292-60-2) with a purity by weight of 97% or more 6%
  32. 2934 99 90 37 4-propan-2-ylmorpholine (cas rn 1004-14-4) 6%
  33. 2934 99 90 38 2-chloro-9h-thioxanthen-9-one (cas rn 86-39-5) with a purity by weight of 98% or more 6%
  34. 2934 99 90 39 4-(oxiran-2-ylmethoxy)-9h-carbazole (cas rn 51997-51-4) 6%
  35. 2934 99 90 40 2.3-pyrazinedicarboxylic anhydride (cas rn 4744-50-7) with a purity by weight of 95% or more 6%
  36. 2934 99 90 41 11-[4-(2-chloro-ethyl)-1-piperazinyl]dibenzo(b,f)(1.4)thiazepine (cas rn 352232-17-8) 6%
  37. 2934 99 90 45 4-[4-[(5s)-5-(aminomethyl)-2-oxo-3-oxazolidinyl] phenyl]-3-morpholinone, hydrochloride (cas rn 898543-06-1) with a purity by weight of 98% or more 6%
  38. 2934 99 90 46 (6r-trans)-7-amino-8-oxo-3-[[(1.2,5.6-tetrahydro-2-methyl-5.6-dioxo-1.2,4-triazin-3-yl)thio]methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (cas rn 58909-56-1) with a purity by weight of 97% or more 6%
  39. 2934 99 90 47 2.4-diethyl-9h-thioxanthen-9-one (cas rn 82799-44-8) with a purity by weight of 97% or more 6%
  40. 2934 99 90 48 Propan-2-ol -- 2-methyl-4-(4-methylpiperazin-1-yl)-10h-thieno[2.3-b][1.5]benzodiazepine (1:2) dihydrate, (cas rn 864743-41-9) 6%
  41. 2934 99 90 49 Cytidine 5'-(disodium phosphate) (cas rn 6757-06-8) 6%
  42. 2934 99 90 50 Vutrisiran (inn) (cas rn 1867157-35-4) with a purity by weight of 98% or more 6%
  43. 2934 99 90 51 Uridine 5'-triphosphate trisodium salt (cas rn 19817-92-6) with a dry weight purity of 90% or more 6%
  44. 2934 99 90 55 Uridine (cas rn 58-96-8) with a purity by weight of 98% or more 6%
  45. 2934 99 90 56 1-[5-(2.6-difluorophenyl)-4.5-dihydro-1.2-oxazol-3-yl]ethanone (cas rn 1173693-36-1) 6%
  46. 2934 99 90 57 Dimethenamide-p (iso) (cas rn 163515-14-8) with a purity by weight of 93% or more 6%
  47. 2934 99 90 59 Dolutegravir (inn) (cas rn 1051375-16-6) or dolutegravir sodium (cas rn 1051375-19-9) 6%
  48. 2934 99 90 60 Dl-homocysteine thiolactone hydrochloride (cas rn 6038-19-3) 6%
  49. 2934 99 90 61 5-(1.2-dithiolan-3-yl)valeric acid (cas rn 1077-28-7) 6%
  50. 2934 99 90 63 (2b,3a,5a,16b,17b)-2-(morpholin-4-yl)-16-(pyrrolidin-1-yl)androstane-3.17-diol (cas rn 119302-20-4) 6%
  51. 2934 99 90 64 2-bromo-5-benzoylthiophene (cas rn 31161-46-3) 6%
  52. 2934 99 90 65 Benzo[b]thiophen-10-methoxycycloheptanone (cas rn 59743-84-9) with a purity by weight of 98% or more 6%
  53. 2934 99 90 66 Tetrahydrothiophene-1.1-dioxide (cas rn 126-33-0) 6%
  54. 2934 99 90 67 5-chlorothiophene-2-carboxylic acid (cas rn 24065-33-6) 6%
  55. 2934 99 90 69 3-methyl-5-(4.4,5.5-tetramethyl-1.3,2-dioxaborolan-2-yl)benzo[d]oxazol-2(3h)-one (cas rn 1220696-32-1) with a purity by weight of 95% or more 6%
  56. 2934 99 90 70 1.3,4-thiadiazolidine-2.5-dithione (cas rn 1072-71-5) with a purity by weight of 95% or more 6%
  57. 2934 99 90 71 3.4-dichloro-1.2,5-thiadiazole (cas rn 5728-20-1) with a purity by weight of 99% or more 6%
  58. 2934 99 90 72 2-trifluoromethyl-9-allyl-9-thioxanthen-ol (cas rn 850808-70-7) with a purity by weight of 98% or more 6%
  59. 2934 99 90 74 2-isopropylthioxanthone (cas rn 5495-84-1) 6%
  60. 2934 99 90 75 (4r-cis)-1.1-dimethylethyl-6-[2[2-(4-fluorophenyl)-5-(1-isopropyl)-3-phenyl-4-[(phenylamino)carbonyl]-1h-pyrrol-1-yl]ethyl]-2.2-dimethyl-1.3-dioxane-4-acetate (cas rn 125971-95-1) 6%
  61. 2934 99 90 76 Nedosiran sodium (innm) (cas rn 2247026-22-6) with a purity by weight of 95% or more 6%
  62. 2934 99 90 77 Tazemetostat (inn) (cas 1403254-99-8) with a purity by weight of 99% or more and its salts 6%
  63. 2934 99 90 78 Disodium uridine-5'-monophosphate (cas rn 3387-36-8) with a purity by weight of 98% or more 6%
  64. 2934 99 90 81 1-(4-aminophenyl)-5-(morpholin-4-yl)-2.3-dihydropyridin-6-one (cas rn 1267610-26-3) with a purity by weight of 98% or more 6%
  65. 2934 99 90 82 Rel-(3ar,12br)-11-chloro-2.3,3a,12b-tetrahydro-2-methyl-1h-dibenz[2.3:6.7]oxepino[4.5-c]pyrrol-1-one (cas rn 129385-59-7) with a purity by weight of 97% or more 6%
  66. 2934 99 90 83 Flumioxazin (iso) (cas rn 103361-09-7) of a purity by weight of 96% or more 6%
  67. 2934 99 90 85 Gilteritinib (inn) (cas 1254053-43-4) with a purity by weight of 98% or more and its salts 6%
  68. 2934 99 90 86 Dithianon (iso) (cas rn 3347-22-6) 6%
  69. 2934 99 90 87 2.2'-(1.4-phenylene)bis(4h-3.1-benzoxazin-4-one) (cas rn 18600-59-4) 6%
  70. 2934 99 90 88 (7s,9as)-7-((benzyloxy)methyl)octahydropyrazino[2.1-c][1.4]oxazine dioxalate (cas rn 1268364-46-0) 6%
  71. 2934 99 90 89 6r-[6α,7β(z)]]-7-[2-furyl(methoxyimino)acetamido]-3-(hydroxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (cas rn 56271-94-4) with a purity by weight of 96% or more 6%
  72. 2934 99 90 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 3

  • 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 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 33 of 70 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 70 lines
  • Import controlRestriction on entry into free circulation
    Applies to goods from
    Syria, Ukraine
    Legal act
    S.I. 2022/395, S.I. 2019/792
    Documents
    • 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 70 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 70 lines

Preferential rates by country

Agreement or schemeCountriesRate
standard rate (no agreement)—Free – 6%
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£437.6m-3% · previous 12 months
Average import price£68.76 per kg
Jan 2024: £33.3mFeb 2024: £28.4mMar 2024: £36mApr 2024: £25.7mMay 2024: £27mJun 2024: £26.1mJul 2024: £32.1mAug 2024: £34.9mSept 2024: £28.3mOct 2024: £22.3mNov 2024: £32.6mDec 2024: £32.2mJan 2025: £56.4mFeb 2025: £29.4mMar 2025: £63.2mApr 2025: £36.7mMay 2025: £28.5mJun 2025: £35.3mJul 2025: £41.6mAug 2025: £44.8mSept 2025: £29.1mOct 2025: £35.6mNov 2025: £35.4mDec 2025: £33.8mJan 2026: £24.3mFeb 2026: £55.6mMar 2026: £34.5mApr 2026: £33.8mMay 2026: £46.1mJun 2026: £28.5mJul 2026: £43.9mAug 2026: £37m 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
United States £117.4m 26.8% +36.5%
Germany £88.4m 20.2% -11.2%
Switzerland £75.5m 17.3% +44.6%
China £54.3m 12.4% -19.1%
Singapore £51.7m 11.8% +2.8%
India £17.6m 4% -44.1%
Ireland £5.6m 1.3% -84.8%
Spain £4.5m 1% -24.2%

Same subheading in other tariffs

EU Free – 6.5% Third-country duty 2 tariff lines · average 3.3% Türkiye Free – 6.5% Third-country duty 16 tariff lines · average 4.9% USA Free – 6.5% General (MFN) 19 tariff lines · average 4.6% Canada Free Third-country duty 2 tariff lines Mexico Free – 5% Third-country duty 9 tariff lines · average 2.8% Brazil Free – 12.6% Third-country duty 37 tariff lines · average 3.9% Argentina Free – 12.6% Third-country duty 86 tariff lines · average 1.8% Peru Free Third-country duty 5 tariff lines New Zealand Free Third-country duty 4 tariff lines Japan Free – 3.1% Third-country duty 4 tariff lines · average 0.8% Taiwan Free – 6.5% Third-country duty 15 tariff lines · average 4% GCC 5% Third-country duty 5 tariff lines Switzerland Free Third-country duty 1 tariff line Norway Free Third-country duty 2 tariff lines North Macedonia Free – 5% Third-country duty 3 tariff lines · average 1.7% Nigeria 5% Third-country duty 1 tariff line

World trade in 2024

2934.99 · US$26bn

Trade value (US$) no reported trade < US$57kUS$57k+US$4m+US$374m+> US$2bn

Exports: 161
  1. Ireland: US$5bn
  2. China: US$4bn
  3. Singapore: US$3bn
  4. Switzerland: US$2bn
  5. United States: US$2bn
  6. Germany: US$1bn
  7. India: US$1bn
  8. Belgium: US$1bn
  9. Japan: US$1bn
  10. Spain: US$956m
  11. United Kingdom: US$929m
  12. Netherlands: US$677m
  13. Italy: US$470m
  14. France: US$416m
  15. South Korea: US$374m
  16. Austria: US$220m
  17. Finland: US$143m
  18. Slovenia: US$98m
  19. Lithuania: US$70m
  20. Indonesia: US$64m
  21. Taiwan: US$63m
  22. Hungary: US$62m
  23. Sweden: US$51m
  24. Canada: US$51m
  25. Czechia: US$41m
  26. Portugal: US$34m
  27. Mexico: US$31m
  28. Israel: US$19m
  29. Ukraine: US$16m
  30. Denmark: US$13m
  31. Poland: US$12m
  32. Argentina: US$11m
  33. Croatia: US$11m
  34. Thailand: US$9m
  35. Hong Kong SAR China: US$8m
  36. Türkiye: US$5m
  37. Malta: US$4m
  38. Brazil: US$3m
  39. Malaysia: US$3m
  40. Luxembourg: US$3m
  41. Russia: US$3m
  42. Latvia: US$2m
  43. South Africa: US$2m
  44. Greece: US$2m
  45. Australia: US$1m
  46. Uruguay: US$1m
  47. Slovakia: US$1m
  48. Romania: US$995k
  49. Saudi Arabia: US$841k
  50. Belize: US$577k
  51. Norway: US$554k
  52. Guatemala: US$542k
  53. Estonia: US$517k
  54. Serbia: US$453k
  55. Chile: US$444k
  56. Kazakhstan: US$433k
  57. Mauritius: US$410k
  58. Cyprus: US$385k
  59. Kyrgyzstan: US$359k
  60. New Zealand: US$326k

Top exporters

RankCountryValueShare
1 Ireland US$5bn 20.7%
2 China US$4bn 16.3%
3 Singapore US$3bn 10.7%
4 Switzerland US$2bn 8.4%
5 United States US$2bn 6.3%
6 Germany US$1bn 5.7%
7 India US$1bn 5.3%
8 Belgium US$1bn 4.1%
9 Japan US$1bn 4%
10 Spain US$956m 3.6%

Top importers

RankCountryValueShare
1 United States US$6bn 23.5%
2 Germany US$5bn 19.9%
3 Ireland US$2bn 6.4%
4 Italy US$1bn 4.1%
5 Japan US$1bn 3.9%
6 Austria US$932m 3.5%
7 Brazil US$855m 3.2%
8 Switzerland US$834m 3.2%
9 India US$728m 2.8%
10 Belgium US$688m 2.6%

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.

  • 4.8%median duty
  • 57number 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 5.3% 0% – 14% 2023 · HS 2017
Armenia 2.7% 0% – 5% 2023
Aruba 6% 2021 · HS 2012
Australia 0% 2023
Azerbaijan 0% 2023 · HS 2017
Bahamas 45% 2022
Bahrain 5% 2023
Bangladesh 1.7% 0% – 5% 2023 · HS 2017
Barbados 5% 2022 · HS 2017
Belarus 2.7% 0% – 5% 2021 · HS 2017
Belize 5% 2023
Benin 5% 2023
Bermuda 25% 2023
Bhutan 10% 2022
Bolivia 2.5% 0% – 5% 2023 · HS 2017
Bosnia & Herzegovina 0% 2022
Botswana 0% 2023
Brazil 6% 0% – 14% 2023 · HS 2017
Brunei 0% 2023 · HS 2017
Burkina Faso 5% 2023
Burundi 0% 2023
Cambodia 5.8% 0% – 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% 6% – 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) 3.3% 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 5% 2023
Iran 9.9% 5% – 26% 2020 · HS 2017
Israel 0% 2022 · HS 2017
Jamaica 0% 2023
Japan 0.5% 0% – 1.6% 2023
Jordan 0% 2023
Kazakhstan 2.7% 0% – 5% 2023
Kenya 0% 2023
Kiribati 0% 2023 · HS 2002
Kuwait 5% 2023
Kyrgyzstan 2.7% 0% – 5% 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 4.2% 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 1.7% 0% – 5% 2023
Norway 0% 2023
Oman 5% 2023
Pakistan 7.7% 0% – 20% 2023
Palau 3% 2023 · HS 2012
Palestinian Territories 0% 2017 · HS 2017
Panama 2% 0% – 6% 2023
Papua New Guinea 0% 2023
Paraguay 5.2% 0% – 14% 2023 · HS 2017
Peru 0% 2023 · HS 2017
Philippines 1% 2023
Qatar 5% 2023
Russia 2.7% 0% – 5% 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 5.6% 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 4.3% 0% – 6.5% 2023
Tuvalu 0% 2017 · HS 2017
Uganda 0% 2023
Ukraine 0% 2023 · HS 2017
United Arab Emirates 5% 2023
United Kingdom 5.7% 0% – 6% 2023
United States 4.6% 0% – 6.5% 2023
Uruguay 5.6% 0% – 14% 2023 · HS 2017
Uzbekistan 0% 2021 · HS 2017
Vanuatu 5% 2023
Venezuela 5.5% 0% – 14% 2023 · HS 2017
Vietnam 4.2% 0% – 10% 2023
Wallis & Futuna 6% 2021 · HS 2012
Yemen 5% 2017 · HS 2017
Zambia 7.5% 0% – 15% 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
51579 Heterocyclic compounds, n.e.s.
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
20172934.99changed
20122934.99changed
20072934.99changed
20022934.99changed
19962934.90changed
19922933.59, 2934.90changed

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 47

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.

  • N364523 U.S. CBP 18 September 2026 · 2934.99.30.00

    The tariff classification of Suzetrigine (CAS No. 2649467-58-1) imported in bulk powder form, from India

  • N357497 U.S. CBP 3 February 2026 · 2934.99.30.00

    The tariff classification of Elinzanetant (CAS No. 929046-33-3) in bulk form and LYNKUET® (E linzanetant) Capsules in dosage form, from Germany

  • N354921 U.S. CBP 12 November 2025 · 2934.99.30.00

    The tariff classification of Terazosin Hydrochloride Anhydrous (CAS No. 63074-08-8) in bulk form, from Germany

  • N353870 U.S. CBP 16 October 2025 · 2934.99.30.00

    The tariff classification of Cabotegravir (CAS No. 1051375-10-0) in bulk powder form, from Brazil

  • N351608 U.S. CBP 8 August 2025 · 2934.99.39.00

    The tariff classification of RVU305 in bulk form, from China

  • N343643 U.S. CBP 12 February 2025 · 2934.99.90.01

    The tariff classification of Deoxyribonucleic Acid Sodium Salt (DNA-Na) from Japan

  • 600011586 HMRC 7 January 2025 – 6 January 2028 · 2934 99 90 90

    DNA is a double-stranded molecule forming a double helix. Each strand is made up of nucleotides, which include a phosphate group, a sugar molecule (deoxyribose), and one of four nitrogenous bases: adenine (A), thymine (T), cytosine ©, and guanine (G). RNA is typically single-stranded and shorter…

  • 600010728 HMRC 2 September 2024 – 1 September 2027 · 2934 99 90 90

    PolyIC Polyinosinic Acid, sodium salt - a double strand RNA Use: in the treatment of neoplastic diseases Packaging: 10ml sterile glass vial. Transport is frozen at -78°C

  • 600010731 HMRC 21 August 2024 – 20 August 2027 · 2934 99 90 90

    nucleic acid samples RNA (ribonucleic acid) and DNA (deoxyribonucleic acid) Used for clinical trials, laboratory research or diagnostic use Packaging: in test tubes or slides

47 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 Countervailing duty

    Certain Amine Compounds From the People's Republic of China: Initiation of Countervailing Duty Investigation

    FR Doc. 2026-21767 · 91 FR 67290 · Source: federalregister.gov

  2. US Anti-dumping

    Amine Compounds From China; Institution of Antidumping and Countervailing Duty Investigations and Scheduling of Preliminary Phase Investigations

    FR Doc. 2026-20286 · 91 FR 63307 · Source: federalregister.gov

  3. 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

  4. 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

  5. GB Other

    Update to VAT S Coverage – 9 July 2026

    Trade Tariff news 7160 · Source: trade-tariff.service.gov.uk

  6. 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

  7. 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

  8. 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

Rule changes →

The UK Global Tariff divides subheading 2934.99 into 70 tariff lines; the duty is between 0% and 6% (average 5.7%). 3 of them are duty-free.

In the EU Combined Nomenclature, subheading 2934.99 covers 2 tariff lines and the duty is between 0% and 6.5%. 1 of them is duty-free.

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 other heterocyclic compounds into the UK came to £437.6m between September 2025 and August 2026 (down 3% on the year before); United States supplied 27%, followed by Germany.

In 2024, countries exported other heterocyclic compounds worth US$26bn (+12.3% year on year).

The largest exporter was Ireland (US$5bn), followed by China.

Questions and answers

What is the HS code for nucleic acids and their salts, whether or not chemically: other, other?

Nucleic acids and their salts, whether or not chemically: other, other fall under HS subheading 2934.99, part of heading 2934, in section VI of the Harmonized System.

What is the import duty on nucleic acids and their salts in the UK?

Under the UK Global Tariff, imports under 2934.99 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 nucleic acids and their salts in the EU?

Under the EU Combined Nomenclature, imports under 2934.99 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 nucleic acids and their salts?

Ireland, with US$5bn in 2024 (20.7% of world exports).

Which countries can export other 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 – 6% applies. Pick a country above to see its rate.

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

In the 12 months to August 2026, the largest suppliers were United States (27%), Germany (20%) and Switzerland (17%), out of total imports of £437.6m.

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