2935.90: Sulphonamides, other

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) 6%
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 6%
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 6%
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 6%
8. 2935 90 90 20 Toluenesulphonamides 6%
9. 2935 90 90 21 Encorafenib (inn) (cas 1269440-17-6) with a purity by weight of 99% or more 6%
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 6%
11. 2935 90 90 23 N-[4-(2-chloroacetyl)phenyl]methanesulphonamide (cas rn 64488-52-4) 6%
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 6%
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 6%
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) 6%
15. 2935 90 90 29 Vemurafenib (inn) (cas rn 918504-65-1) with a purity by weight of 98% or more 6%
16. 2935 90 90 30 6-aminopyridine-2-sulfonamide (cas rn 75903-58-1) 6%
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 6%
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 6%
19. 2935 90 90 33 4-chloro-3-pyridinesulphonamide (cas rn 33263-43-3) 6%
20. 2935 90 90 37 1.3-dimethyl-1h-pyrazole-4-sulfonamide (cas rn 88398-53-2) 6%
21. 2935 90 90 40 Venetoclax (inn) (cas 1257044-40-8) 6%
22. 2935 90 90 41 Lenacapavir sodium (innm) (cas rn 2283356-12-5) with a purity by weight of 98% or more 6%
23. 2935 90 90 42 Penoxsulam (iso) (cas rn 219714-96-2) 6%
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 6%
25. 2935 90 90 45 Rimsulfuron (iso) (cas rn 122931-48-0) 6%
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) 6%
27. 2935 90 90 50 4.4'-oxydi(benzenesulphonohydrazide) (cas rn 80-51-3) 6%
28. 2935 90 90 53 2.4-dichloro-5-sulphamoylbenzoic acid (cas rn 2736-23-4) 6%
29. 2935 90 90 54 Propoxycarbazone-sodium (iso) (cas rn 181274-15-7) with a purity by weight of 95% or more 6%
30. 2935 90 90 55 Thifensulfuron-methyl (iso) (cas rn 79277-27-3) 6%
31. 2935 90 90 57 N-{2-[(phenylcarbamoyl)amino]phenyl}benzenesulphonamide (cas rn 215917-77-4) 6%
32. 2935 90 90 59 Flazasulfuron (iso) (cas rn 104040-78-0) with a purity of 94% by weight or more 6%
33. 2935 90 90 63 Nicosulphuron (iso), (cas rn 111991-09-4) of a purity by weight of 91% or more 6%
34. 2935 90 90 65 Tribenuron-methyl (iso) (cas rn 101200-48-0) 6%
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 6%
36. 2935 90 90 79 4-[[(2-methoxybenzoyl)amino]sulfonyl]benzoyl chloride (cas rn 816431-72-8) 6%
37. 2935 90 90 80 4-chloro-3-sulphamoylbenzoic acid (cas rn 1205-30-7) with a purity by weight of 97% or more 6%
38. 2935 90 90 88 N-(2-(4-amino-n-ethyl-m-toluidino)ethyl)methanesulphonamide sesquisulphate monohydrate (cas rn 25646-71-3) 6%
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) 6%
40. 2935 90 90 99 Other Free

Additional duties and import rules

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

Preferential rates by country

UK: imports by month

last 12 months£19.8m+11.5% · previous 12 months

Average import price£51.58 per kg

Main suppliers, last 12 months

Country	Value	Share	Change
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% Canada Free Third-country duty 1 tariff line Mexico Free – 5% Third-country duty 38 tariff lines · average 0.5% Brazil Free – 12.6% Third-country duty 19 tariff lines · average 5.1% Argentina Free – 12.6% Third-country duty 36 tariff lines · average 2.7% Peru Free Third-country duty 2 tariff lines New Zealand Free Third-country duty 1 tariff line Japan 3.9% Third-country duty 1 tariff line Taiwan 5% Third-country duty 8 tariff lines GCC 5% Third-country duty 1 tariff line Switzerland Free Third-country duty 1 tariff line Norway Free Third-country duty 1 tariff line North Macedonia Free – 5% Third-country duty 2 tariff lines · average 2.5% Nigeria 5% Third-country duty 1 tariff line

World trade in 2024

Top exporters

Rank	Country	Value	Share
1	Switzerland	US$3bn	31.1%
2	Ireland	US$3bn	29.7%
3	India	US$673m	7.8%
4	China	US$662m	7.7%
5	Singapore	US$423m	4.9%
6	Belgium	US$290m	3.4%
7	France	US$191m	2.2%
8	United States	US$190m	2.2%
9	Netherlands	US$181m	2.1%
10	Germany	US$148m	1.7%

Top importers

Rank	Country	Value	Share
1	United States	US$2bn	23.8%
2	Slovenia	US$2bn	18.9%
3	Spain	US$840m	9.8%
4	Germany	US$551m	6.4%
5	Italy	US$484m	5.6%
6	Belgium	US$335m	3.9%
7	France	US$330m	3.8%
8	China	US$290m	3.4%
9	Canada	US$249m	2.9%
10	Japan	US$230m	2.7%

Import duty on this product around the world 152

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
• 58number of duty-free countries (MFN)
• 45%highest: Bahamas, Bermuda, Comoros

152

Importing country	MFN duty	lines from – to	data year
Albania	0%		2023
Algeria	15%		2023
Angola	0%		2023 · HS 2017
Anguilla	10%		2021 · HS 2017
Argentina	7.2%	2% – 14%	2023 · HS 2017
Armenia	3.3%	0% – 5%	2023
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	3.3%	0% – 5%	2021 · HS 2017
Belize	5%		2023
Benin	5%		2023
Bermuda	25%		2023
Bhutan	10%		2022
Bolivia	5%		2023 · HS 2017
Bosnia & Herzegovina	2.5%	0% – 5%	2022
Botswana	0%		2023
Brazil	7.2%	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	0%		2023 · HS 2017
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)	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
Guatemala	0%		2023
Guinea	5%		2023
Guinea-Bissau	5%		2023
Guyana	5%		2023 · HS 2017
Haiti	3.5%		2020 · HS 2017
Honduras	0%		2023
Hong Kong SAR China	0%		2023
Iceland	0%		2023
India	7.5%		2023
Indonesia	0%		2023
Iran	13%	5% – 26%	2020 · HS 2017
Israel	0%		2022 · HS 2017
Jamaica	0%		2023
Japan	2%		2023
Jordan	0%		2023
Kazakhstan	5%		2023
Kenya	0%		2023
Kuwait	5%		2023
Kyrgyzstan	3.3%	0% – 5%	2021 · HS 2017
Laos	5%		2023 · HS 2017
Lebanon	0%		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%	0% – 5%	2023 · HS 2017
Micronesia	4%		2021 · HS 2017
Moldova	0%		2023 · HS 2017
Mongolia	5%		2023
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	12%	0% – 20%	2023
Palestinian Territories	0%		2017 · HS 2017
Panama	0%		2023
Papua New Guinea	0%		2023
Paraguay	6.8%	2% – 14%	2023 · HS 2017
Peru	0%		2023 · HS 2017
Philippines	3%		2023
Qatar	5%		2023
Russia	3.3%	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%	2% – 6.5%	2023
Sri Lanka	0%		2023
St Kitts & Nevis	0%		2023
St Pierre & Miquelon	8%		2021 · HS 2017
St Vincent & the Grenadines	5%		2023
Sudan	3%		2021 · HS 2017
Switzerland	0%		2023
Tanzania	0%		2023
Thailand	0%		2023
Togo	5%		2023
Tonga	15%		2023 · HS 2017
Türkiye	3.3%	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	4.2%	0% – 6.5%	2023
Uruguay	7.2%	2% – 14%	2023 · HS 2017
Uzbekistan	0%		2021 · HS 2017
Vanuatu	5%		2023
Venezuela	7.2%	2% – 14%	2023 · HS 2017
Vietnam	0%		2023
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

5158 Sulphonamides

End use (BEC Rev. 5)

Intermediate goods · BEC 211220

CPC 2.1 product

35230 Lactones n.e.c., heterocyclic compounds with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring, a pyrimidine ring, a piperazine ring, an unfused triazine ring or a phenothiazine ring system not further fused; hydantoin and its derivatives; sulphonamides

ISIC Rev. 4 activity

2100 Manufacture of pharmaceuticals, medicinal chemical and botanical products

Earlier HS editions

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 12

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. Tariff change 23 September 2026

   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. Import and export controls 20 July 2026

   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. Quota 30 June 2026 · Applies from: 12 July 2026

   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. Other 24 June 2026

   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. Tariff change 4 June 2026

   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.

Questions and answers