tariffs.help
Log in Create free account

Customs code · HS subheading 2934 99

Final code reached

Nucleic acids and their salts, or other residual heterocyclic compounds

Excluding oxygen-only or nitrogen-only heterocycles and the listed exceptions

This is a complete 8-digit customs code. Exports and Intrastat use it as it is. For an import into the EU, pick a 10-digit line below.

This code covers nucleic acids and their salts, including products that are not chemically defined, as well as certain other heterocyclic compounds. The substance must not be an oxygen-only or nitrogen-only heterocycle, a compound with the excluded thiazole, benzothiazole, phenothiazine or other fused-ring structures, or one of the specifically listed products and salts.

For example

  • A nucleic acid
  • A salt of a nucleic acid
See the official tariff text

Official tariff text

Nucleic acids and their salts, whether or not chemically defined; heterocyclic compounds (excl. those with oxygen or nitrogen hetero-atom"s" only, compounds containing in the structure an unfused thiazole ring or a benzothiazole or phenothiazine ring-system or further fused, aminorex "INN", brotizolam "INN", clotiazepam "INN", cloxazolam "INN", dextromoramide "INN", haloxazolam "INN", ketazolam "INN", mesocarb "INN", oxazolam "INN", pemoline "INN", phendimetrazine "INN", phenmetrazine "INN", sufentanil "INN", salts thereof, other fentanyls and their derivatives, chlorpothixene "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, and inorganic or organic compounds of mercury)

You are seeing what applies when you export from the EU. Switch above if you import.

You are seeing what applies when you import into the EU. Switch above if you export.

Your answer for export

The full EU export code is 2934 99 90.

You do not pick a 10-digit EU import line for an export declaration or Intrastat. The destination classifies the goods under its own tariff.

8 digits, ready

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 lines2 Norwegian lines

29.34.9901 Isatoic anhydride

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines69 British lines

2934 99 90 04 Silthiofam (ISO) (CAS RN 175217-20-6) with a purity by weight of 98 % or more

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

6.5% or 15.0%

Depends on a question

  • Their lines22 US lines
  • Entry dateSept. 17, 2026

2934.99.01.00 Nucleic acids and their salts, whether or not chemically defined; other heterocyclic

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 2 Norwegian lines

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.

  • 29.34.9901

    Isatoic anhydride

    Ordinary duty
    Duty free

  • 29.34.9909

    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 69 British lines

Selling to Great Britain

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

  • 2934 99 90 04

    Silthiofam (ISO) (CAS RN 175217-20-6) 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.

  • 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

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

  • 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

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

  • 2934 99 90 07

    Cedazuridine (INN) (CAS RN 1141397-80-9) 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.

  • 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

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

  • 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

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

  • 2934 99 90 10

    Fluralaner (INN) (CAS RN 864731-61-3)

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

  • 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

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.
Show all 69 lines

  • 2934 99 90 12

    Dimethomorph (ISO) (CAS RN 110488-70-5)

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

  • 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

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

  • 2934 99 90 14

    2-Mercaptoadenosine (CAS RN 43157-50-2) 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.

  • 2934 99 90 16

    Difenoconazole (ISO) (CAS RN 119446-68-3)

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

  • 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

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

  • 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

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

  • 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

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

  • 2934 99 90 20

    Thiophene (CAS RN 110-02-1)

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

  • 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

    Ordinary duty
    Duty free

  • 2934 99 90 22

    4-(Oxiran-2-ylmethoxy)-9H-carbazole (CAS RN 51997-51-4) 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.

  • 2934 99 90 24

    Flufenacet (ISO) (CAS RN 142459-58-3) 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.

  • 2934 99 90 26

    4-Methylmorpholine 4-oxide in an aqueous solution (CAS RN 7529-22-8)

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

  • 2934 99 90 27

    2-(4-Hydroxyphenyl)-1-benzothiophene-6-ol (CAS RN 63676-22-2)

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

  • 2934 99 90 28

    11-(Piperazin-1-yl)dibenzo[b,f][1,4]thiazepine dihydrochloride (CAS RN 111974-74-4)

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

  • 2934 99 90 30

    Dibenzo[b,f][1,4]thiazepin-11(10H)-one (CAS RN 3159-07-7)

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

  • 2934 99 90 31

    Thenoic acid (CAS RN 1918-77-0) 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.

  • 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

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

  • 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

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

  • 2934 99 90 35

    Nusinersen sodium (INNM) (CAS RN 1258984-36-9) 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.

  • 2934 99 90 36

    Nadide phosphate (INNM) disodium salt (CAS RN 24292-60-2) 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.

  • 2934 99 90 37

    4-Propan-2-ylmorpholine (CAS RN 1004-14-4)

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

  • 2934 99 90 38

    2-Chloro-9H-thioxanthen-9-one (CAS RN 86-39-5) 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.

  • 2934 99 90 39

    4-(Oxiran-2-ylmethoxy)-9H-carbazole (CAS RN 51997-51-4)

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

  • 2934 99 90 40

    2,3-Pyrazinedicarboxylic anhydride (CAS RN 4744-50-7) 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.

  • 2934 99 90 41

    11-[4-(2-Chloro-ethyl)-1-piperazinyl]dibenzo(b,f)(1,4)thiazepine (CAS RN 352232-17-8)

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

  • 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

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

  • 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

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

  • 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

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

  • 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)

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

  • 2934 99 90 49

    Cytidine 5'-(disodium phosphate) (CAS RN 6757-06-8)

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

  • 2934 99 90 50

    Vutrisiran (INN) (CAS RN 1867157-35-4) 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.

  • 2934 99 90 51

    Uridine 5'-triphosphate trisodium salt (CAS RN 19817-92-6) with a dry weight purity 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.

  • 2934 99 90 55

    Uridine (CAS RN 58-96-8) 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.

  • 2934 99 90 56

    1-[5-(2,6-Difluorophenyl)-4,5-dihydro-1,2-oxazol-3-yl]ethanone (CAS RN 1173693-36-1)

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

  • 2934 99 90 57

    Dimethenamide-P (ISO) (CAS RN 163515-14-8) with a purity by weight of 93 % or more

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

  • 2934 99 90 59

    Dolutegravir (INN) (CAS RN 1051375-16-6) or dolutegravir sodium (CAS RN 1051375-19-9)

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

  • 2934 99 90 60

    DL-Homocysteine thiolactone hydrochloride (CAS RN 6038-19-3)

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

  • 2934 99 90 61

    5-(1,2-dithiolan-3-yl)valeric acid (CAS RN 1077-28-7)

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

  • 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)

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

  • 2934 99 90 64

    2-Bromo-5-benzoylthiophene (CAS RN 31161-46-3)

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

  • 2934 99 90 65

    Benzo[b]thiophen-10-methoxycycloheptanone (CAS RN 59743-84-9) 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.

  • 2934 99 90 66

    Tetrahydrothiophene-1,1-dioxide (CAS RN 126-33-0)

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

  • 2934 99 90 67

    5-Chlorothiophene-2-carboxylic acid (CAS RN 24065-33-6)

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

  • 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

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

  • 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

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

  • 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

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

  • 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

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

  • 2934 99 90 74

    2-Isopropylthioxanthone (CAS RN 5495-84-1)

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

  • 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)

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

  • 2934 99 90 76

    Nedosiran sodium (INNM) (CAS RN 2247026-22-6) 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.

  • 2934 99 90 77

    Tazemetostat (INN) (CAS 1403254-99-8) with a purity by weight of 99 % or more and its salts

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

  • 2934 99 90 78

    Disodium uridine-5'-monophosphate (CAS RN 3387-36-8) 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.

  • 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

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

  • 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

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

  • 2934 99 90 83

    Flumioxazin (ISO) (CAS RN 103361-09-7) of 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.

  • 2934 99 90 85

    Gilteritinib (INN) (CAS 1254053-43-4) with a purity by weight of 98 % or more and its salts

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

  • 2934 99 90 86

    Dithianon (ISO) (CAS RN 3347-22-6)

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

  • 2934 99 90 87

    2,2'-(1,4-Phenylene)bis(4H-3,1-benzoxazin-4-one) (CAS RN 18600-59-4)

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

  • 2934 99 90 88

    (7S,9aS)-7-((benzyloxy)methyl)octahydropyrazino[2,1-c][1,4]oxazine dioxalate (CAS RN 1268364-46-0)

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

  • 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

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

  • 2934 99 90 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 22 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.

  • 2934.99.01.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Mycophenolate mofetil

    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

  • 2934.99.03.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt

    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

  • 2934.99.05.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)

    General rate
    5.8%
    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

  • 2934.99.06.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its 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

  • 2934.99.07.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl)

    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

  • 2934.99.08.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 2,5-Diphenyloxazole

    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

  • 2934.99.09.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 1,2-Benzisothiazolin-3-one

    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

  • 2934.99.11.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Pesticides, 2-tert-Butyl-4-(2,4-dichloro-5- isopropoxyphenyl)-Δ²-1,3,4- oxadiazolin-5-one; 3-Isopropyl-1H-2,1,3- benzothiadiazin-4-(3H)-one-2,2- dioxide (Bentazon); andO,O-Diethyl-S-[(6-chloro-2- oxobenzoxazolin-3-yl)methyl]- phosphorodithioate (Phosalone)

    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 22 lines

  • 2934.99.12.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Fungicides

    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

  • 2934.99.15.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Pesticides, Other, 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

  • 2934.99.16.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Insecticides

    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

  • 2934.99.18.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 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

  • 2934.99.20.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Photographic chemicals

    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

  • 2934.99.30.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, Other, Drugs

    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

  • 2934.99.39.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Aromatic or modified aromatic, 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

  • 2934.99.44.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, 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

  • 2934.99.47.20

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Drugs, Rocuronium (INN) and its salts

    General rate
    3.7%
    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

  • 2934.99.47.30

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Drugs, Tacrolimus (INN) and its salts

    General rate
    3.7%
    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

  • 2934.99.47.40

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Drugs, Timolol maleate and its salts

    General rate
    3.7%
    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

  • 2934.99.47.90

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Drugs, Other

    General rate
    3.7%
    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

  • 2934.99.70.00

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, Other, Morpholinoethyl chloride hydrochloride; 2-Methyl-2,5-dioxo-1-oxa-2-phospholan; and (6R-trans)-7-Amino-3-methyl-8-oxo-5- thia-1-azabicyclo[4.2.0]-oct-2-ene-2- carboxylic acid

    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

  • 2934.99.90.01

    Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, 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.

Before you use the code

Check the facts that sit outside the code

The code can be right while what you pay still changes, because of where the goods come from, when they arrive, or extra EU measures.

Classify your own product, free Look up the current rates and rules
  1. The product and its form Check that your product really matches this description, including what it is made of and the form it arrives in.
  2. Country of origin Trade agreements, sanctions and extra measures can change the treatment of the very same code.
  3. Current tariff measures Check today's rate, any restrictions or licences, and the quantity customs asks for, with Toldstyrelsen or TARIC.

On an EU import declaration

Pick the 10-digit line that matches the goods.

69 import lines

When these goods are imported into the EU, the declaration needs a 10-digit code. Under 2934 99 90 the EU tariff has 69 lines, each with its own wording.

You or your customs agent pick the line whose wording fits the goods; the last line, "Other", covers what none of the specific wordings describe.

  1. Match the whole wording A line is its own wording plus the grouping text above it. Read both before you settle on one.

A suspension is a lower rate the EU grants for specific products; whether your goods qualify depends on the line's wording and conditions.

Exports from the EU and Intrastat normally use the 8-digit code as it is.

EU tariff data of Sept. 13, 2026.

Rates, origin and documents

Read the signals first. Open only the ones you want to check.

Besides the ordinary duty, the EU records these kinds of measure against this code. They are listed as signals only: whether one applies to your goods can depend on where they come from, who produced them, the exact product and the documents you present. No amounts are worked out here.

Data of Sept. 1, 2026

Extra duty on goods from some countries

First

Trade-defence measures, such as anti-dumping duty, may apply to goods originating in:

  • China
  • any country except China
  • Türkiye

The duty depends on the producer or exporter, so two shipments of the same goods can be charged differently.

This is recorded on a more detailed code below this one, so it may not cover your goods. See the import lines under this code

Check this code in the official EU TARIC database

Lower duty for goods from some countries

Possible

Preferential rates exist for goods originating in:

  • San Marino
  • Comoros (excluding Mayotte), Madagascar, Mauritius, Seychelles and dependencies and Zimbabwe
  • Botswana, Eswatini, Lesotho, Mozambique and Namibia
  • Ivory Coast
  • Cameroon
  • Fiji
  • United Kingdom
  • Georgia
  • +46 origins

These rates apply to Economic Partnership Agreements; CARIFORUM except Haiti; GSP-EBA (Special arrangement for the least-developed countries - Everything But Arms); OCTs (Overseas Countries and Territories); GSP - General arrangements except India; GSP+ (incentive arrangement for sustainable development and good governance).

Whether you can use one depends on the origin rules for the goods and on the documentation you can show.

Check this code in the official EU TARIC database

A limited quantity at a lower rate

Check

A tariff quota is recorded for this code. This does not say whether any of the quota is still available. It covers goods originating in:

  • any country except Belarus and Russian Federation

This is recorded on a more detailed code below this one, so it may not cover your goods. See the import lines under this code

Check this code in the official EU TARIC database

Restrictions and paperwork

Important

Import restrictions are recorded for goods originating in:

  • Ukraine
  • Belarus
  • Russian Federation
  • any country

The EU records document conditions on this code. What customs may ask for depends on where the goods come from, exactly what the product is and the customs procedure.

Proof of origin 2 conditions

If you claim a lower rate for goods from a country the EU has a trade agreement with, customs asks for proof of origin, for example a EUR.1 certificate or an origin declaration.

Show the EU's own wording for these conditions
  • Movement certificate EUR.1
  • Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

Sanctions and restricted regions 5 conditions

Some conditions come from EU sanctions rules. They matter when the goods are linked to a country or region the EU restricts trade with.

Show the EU's own wording for these conditions
  • Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
  • Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
  • The prohibitions defined in article 1aa paragraph 1 of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1aa paragraph 2b)
  • The prohibitions defined in article 1aa.1 of Council Regulation (EC) No 765/2006 do not apply (see exemptions in article 1aa.2a)
  • The prohibitions defined in article 4 paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 4 paragraph 2)

Product controls and permits 3 conditions

Depending on the exact product, customs may ask for a licence, a permit or a control certificate before the goods are released.

Show the EU's own wording for these conditions
  • Compliance with the REACH restrictions defined in Column 2 of Annex XVII of Regulation (EC) No 1907/2006
  • Exemption from REACH restrictions by virtue of Article 67(1) and 67(2) of Regulation (EC) No 1907/2006
  • Substance/mixture not subjected to the provisions of Regulation (EC) No 1907/2006 (Annex XVII)

Statements that the goods are outside a rule's scope 3 conditions

Some conditions are statements that a rule does not cover the goods, for example that the product is not on a controlled list.

Show the EU's own wording for these conditions
  • Goods other than those described in the Common Military List of the European Union
  • Goods other than those falling under the applicable provisions of Regulation (EU) 2024/573
  • Goods other than those falling under the import prohibitions defined in article 4.6 of Regulation (EU) 2024/573

Other conditions 3 conditions

These conditions match none of the groups above. Whether customs asks for one depends on the goods, where they come from and the customs procedure.

Show the EU's own wording for these conditions
  • Goods labelled according to the provisions of Article 12 of Regulation (EU) 2024/573
  • Undertaking registered in the F-Gas Portal according to Article 20 of Regulation (EU) 2024/573
  • Tonnes of CO₂ equivalent of bulk gases and of gases contained in products or equipment, and parts thereof
Check this code in the official EU TARIC database

EU tariff measure data of Sept. 1, 2026.

One last classification check

Check the path and the nearest alternatives.

Use this view if you are still unsure the code describes the product precisely.

How we got to this code

  1. VI
  2. 29
  3. 2934
  4. 2934 99
  5. 2934 99 90
Show the steps

Compare with the codes next to it.

Compare the sibling codes at this level before you settle on this one.

Worth comparing

Codes that sit close to this one, for when the material itself could be different.

Browse chapter 29

Similar products elsewhere in the tariff

Often confused with

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.