Norway
Duty free*
- Their lines2 Norwegian lines
29.31.9001 2-Chlorovinyldichlorasine, bis(2-chlorovinyl)chlorarsine, tris(2-chlorovinyl)arsine
Norwegian tariff data checked Sept. 13, 2026.
Code 2931 90 · Heading 2931
Other isolated, chemically defined organo-inorganic compounds, excluding organic sulfur and mercury compounds
This code covers isolated, chemically defined organo-inorganic compounds that are not covered by one of the specifically named neighbouring classes. Organic sulfur compounds and mercury compounds are excluded.
See the official tariff text
Official tariff text
Separate chemically defined organo-inorganic compounds (excl. organo-sulphur, mercury, tetramethyl lead, tetraethyl lead and tributyltin compounds, and organo-phosphorous derivatives)
Show the steps
Pick the 8-digit code
Import duty on the codes below: No rate on file
Only one code below
2931 90 00
Separate chemically defined organo-inorganic compounds (excl. organo-sulphur, mercury, tetramethyl lead, tetraethyl lead and tributyltin compounds, and organo-phosphorous derivatives)
No rate on fileThis subheading has one 8-digit code, so that is the code to use.
This is the catch-all under 2931: it covers what the sibling codes below do not.
This is the remainder for the parent group: isolated, chemically defined organo-inorganic compounds that are not organic sulfur or mercury compounds and do not belong to any of the specifically named neighbouring classes.
Compare the sibling codes
See all 17 codes at this levelClassification decides the rate here: from 0.0% to 6.5%.
- 2931 10 Tetramethyl lead and tetraethyl lead 6.5%*
- 2931 20 Tributyltin compounds 6.5%*
- 2931 41 Dimethyl methylphosphonate 6.5%*
- 2931 42 Dimethyl propylphosphonate 6.5%*
- 2931 43 Diethyl ethylphosphonate 6.5%*
- 2931 44 Methylphosphonic acid 6.5%*
- 2931 45 Salt of methylphosphonic acid and (aminoiminomethyl)urea (1: 1) 6.5%*
- 2931 46 2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide 6.5%*
- 2931 47 (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate 6.5%*
- 2931 48 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-dioxide 6.5%*
- 2931 49 Separate chemically defined non-halogenated organo-phosphorous derivatives, n.e.s. 0.0–6.5%*
- 2931 51 Methylphosphonic dichloride 6.5%*
- 2931 52 Propylphosphonic dichloride 6.5%*
- 2931 53 O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate 6.5%*
- 2931 54 Trichlorfon "ISO" 0.0%*
- 2931 59 Separate chemically defined halogenated organo-phosphorous derivatives, n.e.s. 6.5%*
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2931 90 Separate chemically defined organo-inorganic compounds (excl. organo-sulphur, mercury, tetramethyl lead, tetraethyl lead and tributyltin compounds, and organo-phosphorous derivatives) you are here No rate on file
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.
Great Britain
The rate depends on the line.
- Their lines15 British lines
- EU originDuty free*
2931 90 00 15 Methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not 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 lines16 US lines
- Entry dateSept. 17, 2026
2931.90.05.00 Other organo-inorganic compounds, Other, Aromatic, Diphenyldichlorosilane
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.
-
29.31.9001
2-Chlorovinyldichlorasine, bis(2-chlorovinyl)chlorarsine, tris(2-chlorovinyl)arsine
- Ordinary duty
- Duty free*
-
29.31.9009
Other
- Ordinary duty
- Duty free*
Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.
See the 15 British lines
Selling to Great Britain
What UK customs charges when goods like these arrive in Great Britain.
-
2931 90 00 15
Methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl
- Ordinary duty
- 6.0%*
- Goods of EU origin
- Duty free* You need documentation of EU preferential origin to use this rate.
-
2931 90 00 21
(2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) 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.
-
2931 90 00 23
Ixazomib citrate (INNM) (CAS RN 1239908-20-3) 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.
-
2931 90 00 28
Triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) 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.
-
2931 90 00 30
Tert-Butylchlorodimethylsilane (CAS RN 18162-48-6) 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.
-
2931 90 00 38
2-(Trimethylsilyl)ethoxymethyl chloride (CAS RN 76513-69-4) 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.
-
2931 90 00 40
Chlorotrimethylsilane (CAS RN 75-77-4) 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.
-
2931 90 00 43
Trimethylindium (CAS RN 3385-78-2) 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.
Show all 15 lines
-
2931 90 00 48
4-Phenoxybenzeneboronic acid (CAS RN 51067-38-0) 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.
-
2931 90 00 50
Trimethylsilane (CAS RN 993-07-7)
- Ordinary duty
- 6.0%*
- Goods of EU origin
- Duty free* You need documentation of EU preferential origin to use this rate.
-
2931 90 00 55
3-(Hydroxymethyl)phenylboronic acid (CAS RN 87199-15-3) 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.
-
2931 90 00 58
Trimethylgallium (CAS RN 1445-79-0) 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.
-
2931 90 00 68
Hydrogen tetrakis(pentafluorophenyl)borate(1-)-N,N-dimethylaniline (1:1) (CAS RN 118612-00-3) 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.
-
2931 90 00 75
Hexadecyltrimethoxysilane (CAS RN 16415-12-6) with a purity by weight of at least 95 %, for use in the manufacture of polyethylene
- Ordinary duty
- 6.0%*
- Goods of EU origin
- Duty free* You need documentation of EU preferential origin to use this rate.
-
2931 90 00 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.
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 16 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.
-
2931.90.05.00
Other organo-inorganic compounds, Other, Aromatic, Diphenyldichlorosilane; and phenyltrichlorosilane
- 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
-
2931.90.10.00
Other organo-inorganic compounds, Other, Aromatic, 4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester
- 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
-
2931.90.15.00
Other organo-inorganic compounds, Other, Aromatic, Sodium tetraphenylboron
- 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
-
2931.90.22.00
Other organo-inorganic compounds, Other, 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
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2931.90.26.00
Other organo-inorganic compounds, Other, Aromatic, Other, Pesticides
- 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
-
2931.90.30.00
Other organo-inorganic compounds, Other, 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
-
2931.90.60.00
Other organo-inorganic compounds, Other, 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
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2931.90.70.00
Other organo-inorganic compounds, Other, N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts
- 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
Show all 16 lines
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2931.90.90.10
Other organo-inorganic compounds, Other, Organo-silicon compounds
- 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
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2931.90.90.21
Other organo-inorganic compounds, Other, Organo-tin compounds, Dibutyltin oxide
- 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
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2931.90.90.25
Other organo-inorganic compounds, Other, Organo-tin compounds, Tetrabutyltin
- 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
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2931.90.90.29
Other organo-inorganic compounds, Other, Organo-tin compounds, 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
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2931.90.90.30
Other organo-inorganic compounds, Other, 2-Chlorovinyldichloroarsine
- 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
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2931.90.90.35
Other organo-inorganic compounds, Other, Bis(2-chlorovinyl)chloroarsine
- 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
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2931.90.90.40
Other organo-inorganic compounds, Other, Tris(2-chlorovinyl)arsine
- 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
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2931.90.90.52
Other organo-inorganic compounds, 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
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.
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