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Code 2935 90 · Heading 2935

Sulfonamides other than perfluorooctane sulfonamides

This category covers sulfonamides, except perfluorooctane sulfonamides. It includes the specifically named compound and metosulam ISO listed under this category, as well as other sulfonamides covered by the child entries.

For example

  • 3-{1-[7-(Hexadecylsulphonylamino)-1H-indol-3-yl]-3-oxo-1H,3H-naphtho[1,8-cd]pyran-1-yl}-N,N-dimethyl-1H-indol-7-sulfonamide
  • Metosulam ISO
  • A sulfonamide other than a perfluorooctane sulfonamide
See the official tariff text

Official tariff text

Sulphonamides (excl. perfluorooctane sulphonamides)

How we got to this code

  1. VI
  2. 29
  3. 2935
  4. 2935 90
Show the steps

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0%

2 codes below this one

Compare the sibling codes

See all 6 codes at this level

Classification decides the rate here: from 0.0% to 6.5%.

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

  • Their lines1 Norwegian line

29.35.9000 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines38 British lines

2935 90 30 00

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

6.5% or 15.0%

Depends on a question

  • Their lines14 US lines
  • Entry dateSept. 17, 2026

2935.90.06.00 Sulfonamides, Other, 4-Amino-6-chloro-m-benzenedisulfonamide

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

  • 29.35.9000

    Other

    Ordinary duty
    Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 38 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

  • 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)

    Ordinary duty
    Duty free

  • 2935 90 90 10

    Florasulam (ISO) (CAS RN 145701-23-1)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 20

    Toluenesulphonamides

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 21

    Encorafenib (INN) (CAS 1269440-17-6) with a purity by weight of 99 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 22

    Methyl 2-(chlorosulfonyl)-4-(methylsulfonamidomethyl)benzoate (CAS RN 393509-79-0) with a purity by weight of 90 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.
Show all 38 lines

  • 2935 90 90 23

    N-[4-(2-Chloroacetyl)phenyl]methanesulphonamide (CAS RN 64488-52-4)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 29

    Vemurafenib (INN) (CAS RN 918504-65-1) with a purity by weight of 98 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 30

    6-Aminopyridine-2-sulfonamide (CAS RN 75903-58-1)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 33

    4-Chloro-3-pyridinesulphonamide (CAS RN 33263-43-3)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 37

    1,3-Dimethyl-1H-pyrazole-4-sulfonamide (CAS RN 88398-53-2)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 40

    Venetoclax (INN) (CAS 1257044-40-8)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 41

    Lenacapavir sodium (INNM) (CAS RN 2283356-12-5) with a purity by weight of 98 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 42

    Penoxsulam (ISO) (CAS RN 219714-96-2)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 45

    Rimsulfuron (ISO) (CAS RN 122931-48-0)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 50

    4,4'-Oxydi(benzenesulphonohydrazide) (CAS RN 80-51-3)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 53

    2,4-Dichloro-5-sulphamoylbenzoic acid (CAS RN 2736-23-4)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 54

    Propoxycarbazone-sodium (ISO) (CAS RN 181274-15-7) with a purity by weight of 95 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 55

    Thifensulfuron-methyl (ISO) (CAS RN 79277-27-3)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 57

    N-{2-[(phenylcarbamoyl)amino]phenyl}benzenesulphonamide (CAS RN 215917-77-4)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 59

    Flazasulfuron (ISO) (CAS RN 104040-78-0) with a purity of 94 % by weight or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 63

    Nicosulphuron (ISO), (CAS RN 111991-09-4) of a purity by weight of 91 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 65

    Tribenuron-methyl (ISO) (CAS RN 101200-48-0)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 79

    4-[[(2-Methoxybenzoyl)amino]sulfonyl]benzoyl chloride (CAS RN 816431-72-8)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 80

    4-Chloro-3-sulphamoylbenzoic acid (CAS RN 1205-30-7) with a purity by weight of 97 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 88

    N-(2-(4-Amino-N-ethyl-m-toluidino)ethyl)methanesulphonamide sesquisulphate monohydrate (CAS RN 25646-71-3)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 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)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2935 90 90 99

    Other

    Ordinary duty
    Depends on the product details
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 14 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

  • 2935.90.06.00

    Sulfonamides, Other, 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.10.00

    Sulfonamides, Other, 2-Amino-N-ethylbenzenesulfonanilide; 5-Amino-α,α,α-trifluorotoluene-2,4-disulfonamide; Benzenesulfonamide; Benzenesulfonyl hydrazide; 2-Chloro-4-amino-5-hydroxybenzenesulfonamide; 2,5-Dimethoxysulfanilanilide; and Metanilamide

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.13.00

    Sulfonamides, Other, (5‐[2‐Chloro‐4‐ (trifluoromethyl)phenoxy]‐N‐ (methylsulfonyl)‐2‐nitrobenzamide) (Fomesafen); N‐(2,6‐Dichloro‐3‐ methylphenyl)‐5‐ amino‐1,3,4‐triazole‐2‐sulfonamide; 2,4‐Dichloro‐5‐ sulfamoylbenzoic acid; N‐Ethyl‐o‐ toluenesulfonamide; N‐Ethyl‐p‐toluenesulfonamide; 7-(Hexadecylsulfonylamino) ‐1H‐indole; Methyl 5‐{[(4,6‐dimethoxy‐2‐pyrimidinyl)amino]‐ carbonylaminosulfonyl} ‐3‐chloro‐1‐methyl‐1H‐pyrazole‐4‐carboxylate (Halosulfuron methyl); and Mixtures of ortho‐ and para-toluenesulfonamides

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.15.00

    Sulfonamides, Other, o-Toluenesulfonamide

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.20.00

    Sulfonamides, Other, Fast color bases and fast color salts

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.29.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Acetylsulfaguanidine

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.30.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Sulfamethazine

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.32.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
Show all 14 lines

  • 2935.90.33.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Sulfathiazole and Sulfathiazole, sodium

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.42.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.48.00

    Sulfonamides, Other, Drugs, Anti-infective agents, Other

    General rate
    6.5%
    From the EU
    6.5% or 15.0% Depends on a question US headings applied: 9903.04.62 Section 232 pharmaceuticals, Proclamation 11020 of 2 April 2026 (91 FR 18183) clauses (3)(c), (4), (5) and (7), heading 9903.04.62 of subchapter III of chapter 99 with U.S. note 40(c) and (f): the rate for patented pharmaceuticals and associated ingredients shall be 15 percent for products of the European Union, the sum of the column 1 duty rate and the additional duty being that rate; generic pharmaceuticals are not subject to tariffs pursuant to section 232 at this time; effective 31 July 2026 for the companies listed in Annex III and 29 September 2026 for other companies

  • 2935.90.60.00

    Sulfonamides, Other, Drugs, Other

    General rate
    6.5%
    From the EU
    6.5% or 15.0% Depends on a question US headings applied: 9903.04.62 Section 232 pharmaceuticals, Proclamation 11020 of 2 April 2026 (91 FR 18183) clauses (3)(c), (4), (5) and (7), heading 9903.04.62 of subchapter III of chapter 99 with U.S. note 40(c) and (f): the rate for patented pharmaceuticals and associated ingredients shall be 15 percent for products of the European Union, the sum of the column 1 duty rate and the additional duty being that rate; generic pharmaceuticals are not subject to tariffs pursuant to section 232 at this time; effective 31 July 2026 for the companies listed in Annex III and 29 September 2026 for other companies

  • 2935.90.75.00

    Sulfonamides, Other, Products described in additional U.S. note 3 to section VI

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2935.90.95.00

    Sulfonamides, Other

    General rate
    6.5%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.