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Code 2933 59 · Heading 2933

Nitrogen-only heterocyclic compounds with a pyrimidine or piperazine ring, excluding the specifically listed products and salts

This category covers nitrogen-only heterocyclic compounds whose structure contains a pyrimidine ring, including hydrogenated forms, or a piperazine ring. It excludes the listed barbiturates and other named products, their salts, diazinon, and 1,4-diazabicyclo[2.2.2]octane (triethylenediamine).

See the official tariff text

Official tariff text

Heterocyclic compounds with nitrogen hetero-atom[s] only, containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure (excl. malonylurea "barbituric acid" and its derivatives, allobarbital "INN", amobarbital "INN", barbital "INN", butalbital "INN", butobarbital "INN", cyclobarbital "INN", methylphenobarbital "INN", pentobarbital "INN", phenobarbital "INN", secbutabarbital "INN", secobarbital "INN", vinylbital "INN", loprazolam "INN", mecloqualone "INN", methaqualone "INN" and zipeprol "INN", and salts thereof)

How we got to this code

  1. VI
  2. 29
  3. 2933
  4. 2933 59
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Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0%

3 codes below this one

Compare the sibling codes

See all 27 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

29.33.5909 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines41 British lines

2933 59 10 00 Diazinon (ISO)

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

6.5% or 15.0%

Depends on a question

  • Their lines13 US lines
  • Entry dateSept. 17, 2026

2933.59.10.00 Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds

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.

  • 29.33.5909

    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 41 British lines

Selling to Great Britain

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

  • 2933 59 10 00

    Diazinon (ISO)

    Ordinary duty
    Duty free

  • 2933 59 20 00

    1,4-Diazabicyclo[2.2.2]octane (triethylenediamine)

    Ordinary duty
    Duty free

  • 2933 59 95 10

    6-Amino-1,3-dimethyluracil (CAS RN 6642-31-5)

    Ordinary duty
    Duty free

  • 2933 59 95 13

    2-Diethylamino-6-hydroxy-4-methylpyrimidine (CAS RN 42487-72-9)

    Ordinary duty
    Duty free

  • 2933 59 95 14

    2-Chloro-7-cyclopentyl-N,N-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide (CAS RN 1211443-61-6) with a purity by weight of 97 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 16

    Tert-butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate (CAS RN 571188-59-5) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 19

    Tert-butyl 4-[(2-chloropyrimidin-5-yl)oxy]butanoate (CAS RN 945771-55-1) with a purity by weight of 95 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 20

    2,4-Diamino-6-chloropyrimidine (CAS RN 156-83-2)

    Ordinary duty
    Duty free
Show all 41 lines

  • 2933 59 95 27

    2-[(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]-3-hydroxypropylacetate (CAS RN 88110-89-8)

    Ordinary duty
    Duty free

  • 2933 59 95 29

    2-Amino-4-(4-methylpiperazin-1-yl) benzoic acid tert-butyl ester (CAS RN 1034975-35-3) with a purity by weight of 95 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 31

    Sotorasib (INN) (CAS RN 2296729-00-3) with a purity by weight of 99 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 32

    5-Chloro-3-nitropyrazolo[1,5-a]pyrimidine (CAS RN 1363380-51-1) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 33

    4,6-Dichloro-5-fluoropyrimidine (CAS RN 213265-83-9)

    Ordinary duty
    Duty free

  • 2933 59 95 34

    6-chloro-1,3-dimethyluracil (CAS RN 6972-27-6) with a purity by weight of 97 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 35

    3-Iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (CAS RN 151266-23-8) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 36

    1-(Cyclopropylcarbonyl)piperazine hydrochloride (CAS RN 1021298-67-8) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 38

    5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one (CAS No 139756-22-2) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 40

    Pirimiphos-methyl (ISO) (CAS RN 29232-93-7) with a purity by weight of 90 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 41

    2-(4-Phenoxyphenyl)-7-(piperidin-4-yl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS RN 2190506-57-9) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 44

    1,4,5,6-Tetrahydro-1,2-dimethylpyrimidine (CAS RN 4271-96-9) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 45

    1-[3-(Hydroxymethyl)pyridin-2-yl]-4-methyl-2-phenylpiperazine (CAS RN 61337-89-1)

    Ordinary duty
    Duty free

  • 2933 59 95 46

    Trilaciclib (CAS RN 1374743-00-6) with a purity by weight of 99 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 47

    6-Methyl-2-oxoperhydropyrimidin-4-ylurea (CAS RN 1129-42-6) with a purity of 94 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 50

    2-(2-Piperazin-1-ylethoxy)ethanol (CAS RN 13349-82-1)

    Ordinary duty
    Duty free

  • 2933 59 95 51

    (1R,5S)-8-Benzyl-3,8-diazabicyclo[3.2.1]octane ; 4-(4-hydroxyphenyl)phenol (2:1) (CAS RN 2642049-87-2) with a purity by weight of 95 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 52

    6-Benzyladenine (CAS RN 1214-39-7) with a purity by weight of 97 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 54

    2-Chloro-4-methylpyrimidine (CAS RN 13036-57-2) with a purity by weight of 99 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 56

    Ruxolitinib phosphate (INNM) (CAS RN 1092939-17-7) with a purity by weight of 99 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 58

    Sitagliptin phosphate monohydrate (INNM) (CAS RN 654671-77-9) with a purity by weight of 95 % or more, and containing by weight not more than 1 % of a stabiliser

    Ordinary duty
    Duty free

  • 2933 59 95 60

    2,6-Dichloro-4,8-dipiperidinopyrimido[5,4-d]pyrimidine (CAS RN 7139-02-8)

    Ordinary duty
    Duty free

  • 2933 59 95 61

    4-Methyl-7H-pyrrolo[2,3-d]pyrimidine (CAS RN 945950-37-8) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 63

    1-(3-Chlorophenyl) piperazine (CAS RN 6640-24-0)

    Ordinary duty
    Duty free

  • 2933 59 95 64

    Thiopental (INNM) (CAS RN 76-75-5) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 65

    1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (CAS RN 140681-55-6)

    Ordinary duty
    Duty free

  • 2933 59 95 66

    Piperazin-2-one (CAS RN 5625-67-2) with a purity by weight of 96 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 68

    Guanine (CAS RN 73-40-5) with a purity by weight of 99 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 70

    N-(4-Ethyl-2,3-dioxopiperazin-1-ylcarbonyl)-D-2-phenylglycine (CAS RN 63422-71-9)

    Ordinary duty
    Duty free

  • 2933 59 95 77

    3-(Trifluoromethyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine hydrochloride (1:1) (CAS RN 762240-92-6)

    Ordinary duty
    Duty free

  • 2933 59 95 82

    Ametoctradin (ISO) (CAS RN 865318-97-4) with a purity by weight of 98 % or more

    Ordinary duty
    Duty free

  • 2933 59 95 87

    5-Bromo-2,4-dichloropyrimidine (CAS RN 36082-50-5)

    Ordinary duty
    Duty free

  • 2933 59 95 90

    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 13 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.

  • 2933.59.10.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Pesticides, Aromatic or modified aromatic, Herbicides

    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

  • 2933.59.15.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Pesticides, Aromatic or modified aromatic, 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

  • 2933.59.18.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Pesticides, 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

  • 2933.59.21.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Aromatic or modified aromatic, Antihistamines, including those principally used as anti-nauseants

    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

  • 2933.59.22.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Aromatic or modified aromatic, Anti-infective agents, Nicarbazin; and Trimethoprim

    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

  • 2933.59.36.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Aromatic or modified aromatic, 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

  • 2933.59.46.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Aromatic or modified aromatic, Antidepressants, tranquilizers and other psychotherapeutic agents

    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

  • 2933.59.53.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Aromatic or modified aromatic, 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
Show all 13 lines

  • 2933.59.59.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Drugs, Other

    General rate
    3.7%
    From the EU
    3.7% 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

  • 2933.59.70.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Aromatic or modified aromatic, 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

  • 2933.59.80.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, Aromatic or modified aromatic, 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

  • 2933.59.85.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, Other, 2-Amino-4-chloro-6-methoxy pyrimidine; 2-Amino-4,6-di methoxy pyrimidine; and 6-Methyl uracil

    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

  • 2933.59.95.00

    Heterocyclic compounds with nitrogen hetero-atom(s) only, Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, 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.