Subheading · Chapter 29 · Heading 2935

2935.90

2935.90: Sulphonamides, other

Other sulphonamides

Official description Other

2935.90 is the HS subheading for other sulphonamides, under heading 2935 in chapter 29.

What you pay

Importing into UK from Barbados

Customs duty Free preferential rate · CARIFORUM · across 38 national lines
Additional duties and charges 2 additional measures
VAT 20.00 % import VAT
Duty calculatorCalculate duty and taxes →

Rates by national line · UK Global Tariff

UK lines →
  1. 2935 90 00 00 Other
  2. 2935 90 30 00 3-{1-[7-(hexadecylsulphonylamino)-1h-indole-3-yl]-3-oxo-1h,3h-naphtho[1.8-cd]pyran-1-yl}-n,n-dimethyl-1h-indole-7-sulphonamide; metosulam (iso) Free
  3. 2935 90 90 00 Other
  4. 2935 90 90 10 Florasulam (iso) (cas rn 145701-23-1) Free6%
  5. 2935 90 90 16 2-bromo-n-(4.5-dimethyl-1.2-oxazol-3-yl)-n-(methoxymethyl) benzene-1-sulfonamide (cas rn 415697-57-3) with a purity by weight of 97% or more Free6%
  6. 2935 90 90 18 4-amino-2.5-dimethoxy-n-methylbenzenesulfonamide (cas rn 49701-24-8) with a purity by weight of 98% or more Free6%
  7. 2935 90 90 19 4-amino-2.5-dimethoxy-n-phenylbenzenesulphonamide (cas rn 52298-44-9) with a purity by weight of 98% or more Free6%
  8. 2935 90 90 20 Toluenesulphonamides Free6%
  9. 2935 90 90 21 Encorafenib (inn) (cas 1269440-17-6) with a purity by weight of 99% or more Free6%
  10. 2935 90 90 22 Methyl 2-(chlorosulfonyl)-4-(methylsulfonamidomethyl)benzoate (cas rn 393509-79-0) with a purity by weight of 90% or more Free6%
  11. 2935 90 90 23 N-[4-(2-chloroacetyl)phenyl]methanesulphonamide (cas rn 64488-52-4) Free6%
  12. 2935 90 90 24 3-({[(4-methylphenyl)sulfonyl]carbamoyl}amino)phenyl 4-methylbenzenesulfonate (cas rn 232938-43-1) with a purity by weight of 99% or more Free6%
  13. 2935 90 90 26 5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1h-pyrrole-3-carbaldehyde (cas rn 881677-11-8) with a purity by weight of 97% or more Free6%
  14. 2935 90 90 27 Methyl (3r,5s,6e)-7-{4-(4-fluorophenyl)-6-isopropyl-2-[methyl(methylsulfonyl)amino]pyrimidin-5-yl}-3.5-dihydroxyhept-6-enoate (cas rn 147118-40-9) Free6%
  15. 2935 90 90 29 Vemurafenib (inn) (cas rn 918504-65-1) with a purity by weight of 98% or more Free6%
  16. 2935 90 90 30 6-aminopyridine-2-sulfonamide (cas rn 75903-58-1) Free6%
  17. 2935 90 90 31 5-(n-3-methylphenyl-sulfonylamido)-(n',n''-bis-(3-methylphenyl)-isophthalicacid-diamide) (cas rn 2375645-78-4) with a purity by weight of 95% or more Free6%
  18. 2935 90 90 32 4-chloro-3-nitro-5-sulphamoylbenzoic acid (cas rn 22892-96-2) with a purity by weight of 96% or more Free6%
  19. 2935 90 90 33 4-chloro-3-pyridinesulphonamide (cas rn 33263-43-3) Free6%
  20. 2935 90 90 37 1.3-dimethyl-1h-pyrazole-4-sulfonamide (cas rn 88398-53-2) Free6%
  21. 2935 90 90 40 Venetoclax (inn) (cas 1257044-40-8) Free6%
  22. 2935 90 90 41 Lenacapavir sodium (innm) (cas rn 2283356-12-5) with a purity by weight of 98% or more Free6%
  23. 2935 90 90 42 Penoxsulam (iso) (cas rn 219714-96-2) Free6%
  24. 2935 90 90 44 4-[2-(7-methoxy-4.4-dimethyl-1.3-dioxo-3.4-dihydroisoquinolin-2(1h)-yl)ethyl]bezenesulphonamide (cas rn 33456-68-7) with a purity by weight of 99.5% or more Free6%
  25. 2935 90 90 45 Rimsulfuron (iso) (cas rn 122931-48-0) Free6%
  26. 2935 90 90 48 (3r,5s,6e)-7-[4-(4-fluorophenyl)-2-[methyl(methylsulfonyl)amino]-6-(propan-2-yl)pyrimidin-5-yl]-3.5-dihydroxyhept-6-enoic acid -- 1-[(r)-(4-chlorophenyl)(phenyl)methyl]piperazine (1:1), (cas rn 1235588-99-4) Free6%
  27. 2935 90 90 50 4.4'-oxydi(benzenesulphonohydrazide) (cas rn 80-51-3) Free6%
  28. 2935 90 90 53 2.4-dichloro-5-sulphamoylbenzoic acid (cas rn 2736-23-4) Free6%
  29. 2935 90 90 54 Propoxycarbazone-sodium (iso) (cas rn 181274-15-7) with a purity by weight of 95% or more Free6%
  30. 2935 90 90 55 Thifensulfuron-methyl (iso) (cas rn 79277-27-3) Free6%
  31. 2935 90 90 57 N-{2-[(phenylcarbamoyl)amino]phenyl}benzenesulphonamide (cas rn 215917-77-4) Free6%
  32. 2935 90 90 59 Flazasulfuron (iso) (cas rn 104040-78-0) with a purity of 94% by weight or more Free6%
  33. 2935 90 90 63 Nicosulphuron (iso), (cas rn 111991-09-4) of a purity by weight of 91% or more Free6%
  34. 2935 90 90 65 Tribenuron-methyl (iso) (cas rn 101200-48-0) Free6%
  35. 2935 90 90 70 (4s)-4-hydroxy-2-(3-methoxypropyl)-3.4-dihydro-2h-thieno[3.2-e]thiazine-6-sulfonamide-1.1-dioxide (cas rn 154127-42-1) with a purity by weight of 97% or more Free6%
  36. 2935 90 90 79 4-[[(2-methoxybenzoyl)amino]sulfonyl]benzoyl chloride (cas rn 816431-72-8) Free6%
  37. 2935 90 90 80 4-chloro-3-sulphamoylbenzoic acid (cas rn 1205-30-7) with a purity by weight of 97% or more Free6%
  38. 2935 90 90 88 N-(2-(4-amino-n-ethyl-m-toluidino)ethyl)methanesulphonamide sesquisulphate monohydrate (cas rn 25646-71-3) Free6%
  39. 2935 90 90 89 3-(3-bromo-6-fluoro-2-methylindol-1-ylsulphonyl)-n,n-dimethyl-1.2,4-triazol-1-sulphonamide (cas rn 348635-87-0) Free6%
  40. 2935 90 90 99 Other Free

Additional duties and import rulesBarbados

Charges on top of the customs duty, and rules the goods must meet at the border.

Additional duties and charges 2

  • 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
    Tariff lines
    on 24 of 38 lines

UK: imports by month

last 12 months£19.8m+11.5% · previous 12 months
Average import price£51.58 per kg
Jan 2024: £8.4mFeb 2024: £1.5mMar 2024: £514kApr 2024: £5.4mMay 2024: £3.5mJun 2024: £4.4mJul 2024: £1.7mAug 2024: £634kSept 2024: £1.4mOct 2024: £2.4mNov 2024: £289kDec 2024: £1.4mJan 2025: £2.1mFeb 2025: £248kMar 2025: £564kApr 2025: £3.3mMay 2025: £650kJun 2025: £3.9mJul 2025: £1.3mAug 2025: £285kSept 2025: £3.2mOct 2025: £784kNov 2025: £900kDec 2025: £687kJan 2026: £483kFeb 2026: £337kMar 2026: £2.2mApr 2026: £2.4mMay 2026: £775kJun 2026: £307kJul 2026: £515kAug 2026: £7.3m 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
China £11.2m 56.4% +27.9%
United States £3.3m 16.5% +140.4%
Italy £2m 10.2% -27.9%
India £911k 4.6% +11.5%
Ireland £788k 4% -66%
Netherlands £544k 2.7% +1,079.4%
Hong Kong SAR China £204k 1% —
Germany £194k 1% +143.7%

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 13 tariff lines · average 6% USA Free – 6.5% General (MFN) 14 tariff lines · average 4.2%

World trade in 2024

2935.90 · US$8.6bn

Trade value (US$) no reported trade < US$517.3kUS$517.3k+US$10.8m+US$181.4m+> US$672.7m

Exports: 86
  1. Switzerland: US$2.7bn
  2. Ireland: US$2.6bn
  3. India: US$672.7m
  4. China: US$662.3m
  5. Singapore: US$423.4m
  6. Belgium: US$290.1m
  7. France: US$191.1m
  8. United States: US$190.5m
  9. Netherlands: US$181.4m
  10. Germany: US$148.1m
  11. United Kingdom: US$128m
  12. Italy: US$97.9m
  13. South Korea: US$82.1m
  14. Spain: US$64.7m
  15. Japan: US$55.4m
  16. Slovenia: US$44.5m
  17. Croatia: US$17.4m
  18. Ukraine: US$12.4m
  19. Hungary: US$12m
  20. Canada: US$11.1m
  21. Israel: US$10.8m
  22. Taiwan: US$10.2m
  23. Poland: US$10m
  24. Portugal: US$9.7m
  25. Austria: US$8.9m
  26. Finland: US$6.8m
  27. Indonesia: US$5.6m
  28. Czechia: US$5.6m
  29. Hong Kong SAR China: US$4.9m
  30. Brazil: US$4.5m
  31. Greece: US$4.4m
  32. Kuwait: US$1.4m
  33. Venezuela: US$1.1m
  34. Cambodia: US$875.5k
  35. Lithuania: US$733.2k
  36. Argentina: US$724.1k
  37. Serbia: US$692.7k
  38. Cyprus: US$655k
  39. Luxembourg: US$606.6k
  40. Mexico: US$532.7k
  41. Romania: US$517.3k
  42. Malta: US$405.1k
  43. Türkiye: US$394.8k
  44. South Africa: US$387k
  45. Guatemala: US$356.5k
  46. Armenia: US$289.1k
  47. Australia: US$258.4k
  48. Denmark: US$243.7k
  49. Malaysia: US$239.4k
  50. Latvia: US$209.6k
  51. Russia: US$160.3k
  52. Sweden: US$141.5k
  53. Slovakia: US$104k
  54. Estonia: US$90k
  55. Bulgaria: US$67.5k
  56. Panama: US$63.4k
  57. Peru: US$46.3k
  58. Vietnam: US$45.7k
  59. Thailand: US$42.9k
  60. El Salvador: US$42.8k

Top exporters

RankCountryValueShare
1 Switzerland US$2.7bn 31.1%
2 Ireland US$2.6bn 29.7%
3 India US$672.7m 7.8%
4 China US$662.3m 7.7%
5 Singapore US$423.4m 4.9%
6 Belgium US$290.1m 3.4%
7 France US$191.1m 2.2%
8 United States US$190.5m 2.2%
9 Netherlands US$181.4m 2.1%
10 Germany US$148.1m 1.7%

Top importers

RankCountryValueShare
1 United States US$2bn 23.8%
2 Slovenia US$1.6bn 18.9%
3 Spain US$839.9m 9.8%
4 Germany US$551.1m 6.4%
5 Italy US$484.4m 5.6%
6 Belgium US$335.4m 3.9%
7 France US$330.5m 3.8%
8 China US$290m 3.4%
9 Canada US$249.1m 2.9%
10 Japan US$229.7m 2.7%

Binding rulings for similar goods 12

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.

  • N357263 U.S. CBP 20 July 2026 · 2935.90.75.00

    The tariff classification of N-Phenyl-N-(trichloromethylsulfenyl)-benzenesulfonamide (CAS No. 2280-49-1) from China

  • N360727 U.S. CBP 12 May 2026 · 2935.90.60.00

    The tariff classification of Tenapanor Hydrochloride (CAS No. 1234365-97-9) in bulk form, from Taiwan

  • N344340 U.S. CBP 13 March 2025 · 2935.90.95.00

    The tariff classification of Color Developing Agent 3 (CAS No. 25646-71-3) and Color Developing Agent 4 (CAS No. 25646-77-9) from China imported in bulk form

  • N334917 U.S. CBP 13 September 2023 · 2935.90.75.00

    The tariff classification of Sodium bis(trifluoromethane)sulfonimide (CAS # 91742-21-1) from China

  • N333617 U.S. CBP 29 June 2023 · 2935.90.75.00

    The tariff classification of Pergafast 201 from China

  • N331000 U.S. CBP 16 March 2023 · 2935.90.75.00

    The tariff classification of a chemical intermediate from the United Kingdom.

12 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 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

  3. 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

  4. GB Other

    Update to Commodity Code structure to maintain dynamic alignment with the EU – 24 June 2026

    Trade Tariff news 6929 · Source: trade-tariff.service.gov.uk

  5. 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 →

Code history

Since 2017; before, these goods were classified under 2935.00.

The UK Global Tariff divides subheading 2935.90 into 38 tariff lines; the duty is between 0% and 6% (average 5.7%). 2 of them are duty-free.

In the EU Combined Nomenclature, subheading 2935.90 covers 2 tariff lines and the duty is between 0% and 6.5%. 1 of them is duty-free.

173 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 sulphonamides into the UK came to £19.8m between September 2025 and August 2026 (up 12% on the year before); China supplied 56%, followed by United States.

In 2024, countries exported other sulphonamides worth US$8.6bn (+5.6% year on year).

The largest exporter was Switzerland (US$2.7bn), followed by Ireland.

Questions and answers

What is the HS code for sulphonamides, other?

Sulphonamides, other fall under HS subheading 2935.90, part of heading 2935, in section VI of the Harmonized System.

What is the import duty on sulphonamides, other in the UK?

Under the UK Global Tariff, imports under 2935.90 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 sulphonamides, other in the EU?

Under the EU Combined Nomenclature, imports under 2935.90 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 sulphonamides, other?

Switzerland, with US$2.7bn in 2024 (31.1% of world exports).

Which countries can export other sulphonamides to the UK duty-free?

173 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 sulphonamides?

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 sulphonamides from?

In the 12 months to August 2026, the largest suppliers were China (56%), United States (17%) and Italy (10%), out of total imports of £19.8m.

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