tariffs.help
Log in Create free account

Customs code · HS subheading 2923 90

Final code reached

Other quaternary ammonium salts and quaternary ammonium hydroxides

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 quaternary ammonium salts and quaternary ammonium hydroxides that are not otherwise specifically named in this group. It does not cover the separately listed choline and its salts, lecithins and other phosphoaminolipids, tetraethylammonium perfluorooctanesulfonate, or didecyldimethylammonium perfluorooctanesulfonate.

For example

  • A quaternary ammonium salt other than choline and its salts, lecithins and other phosphoaminolipids, tetraethylammonium perfluorooctanesulfonate, or didecyldimethylammonium perfluorooctanesulfonate
  • A quaternary ammonium hydroxide other than the separately named products in this group
See the official tariff text

Official tariff text

Quaternary ammonium salts and hydroxides (excl. choline and its salts, tetraethylammonium perfluorooctane sulphonate and didecyldimethylammonium perfluorooctane sulphonate)

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 2923 90 00.

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 lines1 Norwegian line

29.23.9000 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines13 British lines
  • EU originDuty free

2923 90 00 10 Tetramethylammonium hydroxide, in the form of an aqueous solution containing 25% (± 0,5%)

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

  • Their lines1 US line
  • Entry dateSept. 17, 2026

2923.90.01.00 Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids

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.

  • 29.23.9000

    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 13 British lines

Selling to Great Britain

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

  • 2923 90 00 10

    Tetramethylammonium hydroxide, in the form of an aqueous solution containing 25% (± 0,5%) by weight of tetramethylammonium hydroxide

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

  • 2923 90 00 13

    Bis(N,N,N-trimethyladamantan-1-aminium) sulfate (CAS RN 1000777-61-6) with a purity by weight of 95 % or more, whether or not in aqueous solution containing 20 % or more Bis(N,N,N-trimethyladamantan-1-aminium) sulfate (CAS RN 1000777-61-6)

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

  • 2923 90 00 30

    Tetrabutylammonium tetrahydroborate (CAS RN 33725-74-5) 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.

  • 2923 90 00 33

    Calcium phosphoryl choline chloride tetrahydrate (CAS RN 72556-74-2) 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.

  • 2923 90 00 50

    Betaine hydrochloride (CAS RN 590-46-5), 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.

  • 2923 90 00 55

    Tetrabutylammonium bromide (CAS RN 1643-19-2)

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

  • 2923 90 00 65

    N,N,N-trimethyl-tricyclo[3.3.1.13,7]decan-1-aminium hydroxide (CAS RN 53075-09-5) in form of an aqueous solution with a content of N,N,N-trimethyl-tricyclo[3.3.1.13,7]decan-1-aminium hydroxide by weight of 17,5 % or more but not more than 27,5 %

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

  • 2923 90 00 75

    Tetraethylammonium hydroxide, in the form of an aqueous solution containing: - 35 % (± 0,5 %) by weight of tetraethylammonium hydroxide, - not more than 1 000 mg/kg of chloride, - not more than 2 mg/kg of iron and - not more than 10 mg/kg of potassium

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.
Show all 13 lines

  • 2923 90 00 80

    Diallyldimethylammonium chloride, in the form of an aqueous solution containing by weight 63 % or more but not more than 67 % of diallyldimethylammonium chloride, (CAS RN 7398-69-8)

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

  • 2923 90 00 85

    N,N,N-Trimethylanilinium chloride (CAS RN 138-24-9)

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

  • 2923 90 00 87

    3-Chloro-2-hydroxypropyl)trimethylammonium chloride (CAS RN 3327-22-8), in the form of an aqueous solution containing by weight 65 % or more but not more than 71 % 3-chloro-2-hydroxypropyl)trimethylammonium chloride

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

  • 2923 90 00 88

    Aqueous solution containing by weight 78 % or more but not more than 82 % of [2-(acryloyloxy)ethyl]trimethylammonium chloride (CAS RN 44992-01-0)

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

  • 2923 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.

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 1 US line

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.

  • 2923.90.01.00

    Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined, Other

    General rate
    6.2%
    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.

13 import lines

When these goods are imported into the EU, the declaration needs a 10-digit code. Under 2923 90 00 the EU tariff has 13 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

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
  • Japan
  • 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 10 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
  • Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
  • The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
  • The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
  • Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
  • The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3aa)
  • Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
  • Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
  • Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014

Product controls and permits 4 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
  • Common Health Entry Document for Feed and Food of Non-Animal Origin (CHED-D) (as set out in Part 2, Section D of Annex II to Commission Implementing Regulation (EU) 2019/1715 (OJ L 261))
  • 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)
  • Compliance with the REACH restrictions defined in Column 2 of Annex XVII of Regulation (EC) No 1907/2006

Other conditions 8 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
  • The products are accompanied by a declaration issued before 1 November 2012 in accordance with the Implementing Regulation (EU) No 284/2012 and stating that the products have left Japan before 1 December 2012
  • The products left Japan before 30.10.2012 and comply with Implementing Regulation (EU) No 284/2012
  • The products are accompanied by a declaration issued before 1.6.2013 in accordance with the Implementing Regulation (EU) No 996/2012 and stating that the products have left Japan before 1.7.2013
  • The products left Japan before 2.6.2013 and comply with Implementing Regulation (EU) No 996/2012
  • Products which left Japan before 28 March 2011
  • Declaration for the import into the European Union of feed and food originating in or consigned from Japan (Commission Implementing Regulation (EU) No 322/2014)
  • Declaration for the import into the European Union of feed and food originating in or consigned from Japan (Commission Implementing Regulation (EU) No 322/2014); the products left Japan before 9 January 2016
  • Declaration for the import into the European Union of feed and food originating in or consigned from Japan (Commission Implementing Regulation (EU) No 996/2012) which was issued before 1 April 2014; the products left Japan from 1 April 2014 but before 1 May 2014
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. 2923
  4. 2923 90
  5. 2923 90 00
Show the steps

Subheading 2923 90 has only this one 8-digit code, so there is no neighbour to compare with.

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.