UK Global Tariff · commodity code · HS 2923.90
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)
✓ Can be used in a customs declaration Data: UK Global Tariff · checked on 24 October 2026
- 2923 Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined
- 2923 90 00 00 Other
- 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)
What you pay
Importing into UK
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 3
- Additional dutyAdditional duties 35%
- Applies to goods from
- Belarus, Russia
- Legal act
- 2022 No. 833
- Documents
- 9018
- Duty suspensionAutonomous tariff suspension Free
- Applies to goods from
- all countries
- In force
- until 31 December 2028
- Legal act
- 2020 No. 1435
- Duty suspensionSuspension - goods for certain categories of ships, boats and other vessels and for drilling or production platforms Free
- Applies to goods from
- all countries
- Legal act
- 2020 No. 1431
- Documents
- C990 End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
Import requirements 1
- Import controlRestriction on entry into free circulation
- Applies to goods from
- Russia, Ukraine
- Legal act
- 2023 No. 440, S.I. 2022/395
- Documents
- 9011
- 9022
- 9038
- 9009
- 9010
- 9017
Preferential rates by country
| Agreement or scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | 6% |
| DCTS Comprehensive | Afghanistan, Angola, Bangladesh, Benin and 38 moreAfghanistan, Angola, Bangladesh, Benin, Bhutan, Burkina Faso, Burundi, Cambodia, Central African Republic, Chad, Comoros, Congo - Kinshasa, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Haiti, Kiribati, Laos, Liberia, Malawi, Mali, Mauritania, Myanmar (Burma), Nepal, Niger, Rwanda, São Tomé & Príncipe, Senegal, Sierra Leone, Somalia, South Sudan, Sudan, Tanzania, Timor-Leste, Togo, Tuvalu, Uganda, Yemen, Zambia | Free |
| European Union (including code " EU") | Free | |
| DCTS Enhanced | Algeria, Bolivia, Cape Verde, Congo - Brazzaville and 13 moreAlgeria, Bolivia, Cape Verde, Congo - Brazzaville, Cook Islands, Kyrgyzstan, Micronesia, Mongolia, Nigeria, Niue, Pakistan, Philippines, Sri Lanka, Syria, Tajikistan, Uzbekistan, Vanuatu | Free |
| CARIFORUM | Antigua & Barbuda, Bahamas, Barbados, Belize and 10 moreAntigua & Barbuda, Bahamas, Barbados, Belize, Dominica, Dominican Republic, Grenada, Guyana, Jamaica, St Kitts & Nevis, St Lucia, St Vincent & the Grenadines, Suriname, Trinidad & Tobago | Free |
| OCTs (Overseas Countries and Territories) | Anguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands and 7 moreAnguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Montserrat, Pitcairn Islands, South Georgia & South Sandwich Islands, St Helena, Turks & Caicos Islands | Free |
| Central America | Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama | Free |
| SADC EPA | Botswana, Eswatini, Lesotho, Mozambique, Namibia | Free |
| Eastern and Southern Africa States | Madagascar, Mauritius, Seychelles, Zimbabwe | Free |
| CPTPP | Brunei, Malaysia | Free |
| UK–Andorra agreement | Andorra | Free |
| UK–Albania agreement | Albania | Free |
| UK–Australia agreement | Australia | Free |
| UK–Canada agreement | Canada | Free |
| UK–Switzerland agreement | Switzerland | Free |
| UK–Côte d’Ivoire agreement | Côte d’Ivoire | Free |
| UK–Chile agreement | Chile | Free |
| UK–Cameroon agreement | Cameroon | Free |
| UK–Colombia agreement | Colombia | Free |
| UK–Ceuta & Melilla agreement | Ceuta & Melilla | Free |
| UK–Ecuador agreement | Ecuador | Free |
| UK–Egypt agreement | Egypt | Free |
| UK–Fiji agreement | Fiji | Free |
| UK–Faroe Islands agreement | Faroe Islands | Free |
| UK–Georgia agreement | Georgia | Free |
| UK–Ghana agreement | Ghana | Free |
| DCTS Standard | Indonesia | Free |
| UK–Israel agreement | Israel | Free |
| UK–India agreement | India | Free |
| UK–Iceland agreement | Iceland | Free |
| UK–Jordan agreement | Jordan | Free |
| UK–Japan agreement | Japan | Free |
| UK–Kenya agreement | Kenya | Free |
| UK–South Korea agreement | South Korea | Free |
| UK–Lebanon agreement | Lebanon | Free |
| UK–Liechtenstein agreement | Liechtenstein | Free |
| UK–Morocco agreement | Morocco | Free |
| UK–Moldova agreement | Moldova | Free |
| UK–North Macedonia agreement | North Macedonia | Free |
| UK–Mexico agreement | Mexico | Free |
| UK–Norway agreement | Norway | Free |
| UK–New Zealand agreement | New Zealand | Free |
| UK–Peru agreement | Peru | Free |
| UK–Papua New Guinea agreement | Papua New Guinea | Free |
| UK–Palestinian Territories agreement | Palestinian Territories | Free |
| UK–Serbia agreement | Serbia | Free |
| UK–Solomon Islands agreement | Solomon Islands | Free |
| UK–Singapore agreement | Singapore | Free |
| UK–San Marino agreement | San Marino | Free |
| UK–Tunisia agreement | Tunisia | Free |
| UK–Türkiye agreement | Türkiye | Free |
| UK–Ukraine agreement | Ukraine | Free |
| UK–Vietnam agreement | Vietnam | Free |
| UK–Samoa agreement | Samoa | Free |
| UK–Kosovo agreement | Kosovo | Free |
| UK–South Africa agreement | South Africa | Free |
Footnotes
TN701 According to the Council Regulation (EU) No 692/2014 (OJ L183, p. 9), as retained in UK La…
The prohibition shall not apply in respect of:
(a) the execution until 26 September 2014, of trade contracts concluded before 25 June 2014, or of ancillary contracts necessary for the execution of such contracts, provided that the natural or legal persons, entity or body seeking to perform the contract have notified, at least 10 working days in advance, the activity or transaction to the competent authority of the Member State in which they are established.
(b) goods originating in Crimea or Sevastopol which have been made available to the Ukrainian authorities for examination, for which compliance with the conditions conferring entitlement to preferential origin has been verified and for which a certificate of origin has been issued in accordance with Regulation (EU) No 978/2012 and Regulation (EU) No 374/2014, as retained in UK Law, or in accordance with the EU-Ukraine Association Agreement
TN702 According to the Council Regulation (EU) No 1351/2014 (OJ L365, p. 46), the export of good…
(a) to any natural or legal person, entity or body in Crimea or Sevastopol, or
(b) for use in Crimea or Sevastopol.
The prohibitions shall be without prejudice to the execution until 21 March 2015 of an obligation arising from a contract concluded before 20 December 2014, or by ancillary contracts necessary for the execution of such contracts, provided that the competent authority has been informed at least five working days in advance.
When related to the use in Crimea or Sevastopol, the prohibitions do not apply where there are no reasonable grounds to determine that the goods and technology or the services are to be used in Crimea or Sevastopol.
UK: imports by month · HS 2923.90
Main suppliers, last 12 months
| Country | Value | Share | Change |
|---|---|---|---|
 Italy | £11.5m | 34.1% | -2.5% |
 France | £9.5m | 28% | -36.8% |
 China | £5.2m | 15.3% | +40.8% |
 United States | £2m | 6% | +24.1% |
 India | £1.6m | 4.6% | +32.9% |
 Germany | £1.1m | 3.3% | +45.6% |
 Netherlands | £692k | 2% | -4.6% |
 Spain | £593k | 1.8% | -8.8% |
Same subheading in other tariffs
2923.90 Quaternary ammonium salts and hydroxides: other
EU 6.5% Third-country duty 1 tariff line 
Türkiye 6.5% Third-country duty 6 tariff lines USA 6.2% General (MFN) 1 tariff line 
Canada Free Third-country duty 1 tariff line 
Mexico Free – 5% Third-country duty 5 tariff lines · average 2% 
Brazil Free – 10.8% Third-country duty 7 tariff lines · average 6.2% 
Argentina Free – 10.8% Third-country duty 9 tariff lines · average 4.8% 
Peru Free Third-country duty 2 tariff lines 
New Zealand Free Third-country duty 2 tariff lines 
Japan Free – 3.9% Third-country duty 3 tariff lines · average 1.3% 
Taiwan 5% Third-country duty 1 tariff line 
GCC 5% Third-country duty 5 tariff lines 
Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 1 tariff line 
North Macedonia 5% Third-country duty 1 tariff line 
Nigeria 5% Third-country duty 1 tariff line UK lines: 2923.90
- 2923 90 00 10Tetramethylammonium hydroxide, in the form of an aqueous solution containing 25% (± 0.5%) by weight of tetramethylammonium hydroxide
- 2923 90 00 13Bis(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)
- 2923 90 00 30Tetrabutylammonium tetrahydroborate (cas rn 33725-74-5) with a purity by weight of 97% or more
- 2923 90 00 33Calcium phosphoryl choline chloride tetrahydrate (cas rn 72556-74-2) with a purity by weight of 90% or more
- 2923 90 00 50Betaine hydrochloride (cas rn 590-46-5), with a purity by weight of 93% or more
- 2923 90 00 55Tetrabutylammonium bromide (cas rn 1643-19-2)
- 2923 90 00 65N,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%
- 2923 90 00 75Tetraethylammonium 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
- 2923 90 00 80Diallyldimethylammonium 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)
- 2923 90 00 85N,n,n-trimethylanilinium chloride (cas rn 138-24-9)
- 2923 90 00 873-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
- 2923 90 00 88Aqueous solution containing by weight 78% or more but not more than 82% of [2-(acryloyloxy)ethyl]trimethylammonium chloride (cas rn 44992-01-0)
- 2923 90 00 90Quaternary ammonium salts and hydroxides: other, other
Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N311706 U.S. CBP
The tariff classification of certain Tertiary Amine and Quaternary Ammonium Compounds from China
- N309818 U.S. CBP
The tariff classification of tetramethylammonium chloride (TMAC) 60 % (CAS 75-57-0) from Taiwan
- H278445 U.S. CBP
Application for Further Review of Protest No. 4701-15-100296; N, N, N’, N’-Tetrakis (4-dibutylamino-phenyl)-p-phenylenediaminium dihexafluoroantimonate (CAS 5496-71-9)
Legal notes
Commodity code 2923 90 00 80 is a line of the UK Global Tariff under HS subheading 2923.90 (quaternary ammonium salts and hydroxides: other).
The third-country duty is 6%.
174 countries pay no duty in the UK thanks to trade agreements and preference schemes such as DCTS Comprehensive and European Union, against a standard rate of 6%.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
Imports of goods of subheading 2923.90 into the UK came to £33.8m between September 2025 and August 2026 (down 10% on the year before); Italy supplied 34%, followed by France.
For the same subheading, the EU duty is 6.5%, the Türkiye duty is 6.5%, the US duty is 6.2%, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 0%–10.8%, the Argentina duty is 0%–10.8%, the Peru duty is free, the New Zealand duty is free, the Japan duty is 0%–3.9%, the Taiwan duty is 5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 5% and the Nigeria duty is 5%.
The UK imported goods of subheading 2923.90 worth US$42m in 2024; the largest supplier was France.
Questions and answers
What is the UK import duty for commodity code 2923 90 00 80?
The third-country duty in the UK Global Tariff is 6%. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Which countries get a lower rate on 2923 90 00 80?
174 countries have a preferential rate on this line, 174 of them at 0%, under DCTS Comprehensive, European Union and DCTS Enhanced and other arrangements. The rate applies only to goods that meet the rules of origin of the agreement, with proof of origin. Choose the country of origin on this page to see its rate.
Do anti-dumping or other extra duties apply to 2923 90 00 80?
Additional duty of 35% on goods from Belarus and Russia. These are charged on top of the customs duty.
Where does the UK import these goods from?
For subheading 2923.90 as a whole, the largest supplier in 2024 was France (US$15m), followed by Italy.