2923.90: Quaternary ammonium salts and hydroxides: other

1. 2923 90 00 00 Other
2. 2923 90 00 10 Tetramethylammonium hydroxide, in the form of an aqueous solution containing 25% (± 0.5%) by weight of tetramethylammonium hydroxide 6%
3. 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) 6%
4. 2923 90 00 30 Tetrabutylammonium tetrahydroborate (cas rn 33725-74-5) with a purity by weight of 97% or more 6%
5. 2923 90 00 33 Calcium phosphoryl choline chloride tetrahydrate (cas rn 72556-74-2) with a purity by weight of 90% or more 6%
6. 2923 90 00 50 Betaine hydrochloride (cas rn 590-46-5), with a purity by weight of 93% or more 6%
7. 2923 90 00 55 Tetrabutylammonium bromide (cas rn 1643-19-2) 6%
8. 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% 6%
9. 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 6%
10. 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) 6%
11. 2923 90 00 85 N,n,n-trimethylanilinium chloride (cas rn 138-24-9) 6%
12. 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 6%
13. 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) 6%
14. 2923 90 00 90 Other Free

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Preferential rates by country

UK: imports by month

last 12 months£33.8m-10% · previous 12 months

Average import price£2.47 per kg

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

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 General (MFN) 1 tariff line Mexico Free – 5% General (MFN) 5 tariff lines · average 2% Brazil Free – 10.8% General (MFN) 7 tariff lines · average 6.2% Argentina Free – 10.8% General (MFN) 9 tariff lines · average 4.8% Peru Free General (MFN) 2 tariff lines New Zealand Free General (MFN) 2 tariff lines Japan Free – 3.9% General (MFN) 3 tariff lines · average 1.3% Taiwan 5% General (MFN) 1 tariff line GCC 5% General (MFN) 5 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 1 tariff line North Macedonia 5% General (MFN) 1 tariff line Nigeria 5% General (MFN) 1 tariff line

World trade in 2024

Top exporters

Rank	Country	Value	Share
1	China	US$455m	35.8%
2	United States	US$148m	11.7%
3	Netherlands	US$88m	6.9%
4	Finland	US$73m	5.8%
5	Japan	US$53m	4.2%
6	Italy	US$52m	4.1%
7	South Korea	US$51m	4%
8	India	US$51m	4%
9	Germany	US$51m	4%
10	France	US$41m	3.2%

Top importers

Rank	Country	Value	Share
1	South Korea	US$122m	9.6%
2	United States	US$112m	8.8%
3	Germany	US$105m	8.2%
4	France	US$76m	6%
5	Netherlands	US$66m	5.2%
6	Japan	US$54m	4.2%
7	China	US$51m	4%
8	Taiwan	US$46m	3.6%
9	United Kingdom	US$42m	3.3%
10	Spain	US$41m	3.2%

Import duty on this product around the world 165

The most-favoured-nation (MFN) duty each country applies to goods of this HS subheading: the average over its national tariff lines, with the lowest and highest line where they differ. Goods from countries with a trade agreement often pay less.

• 5%median duty
• 56number of duty-free countries (MFN)
• 45%highest: Bahamas, Bermuda, Cayman Islands

165

Importing country	MFN duty	lines from – to	data year
Afghanistan	5%		2018 · HS 2012
Albania	0%		2023
Algeria	15%		2023
Angola	0%		2023 · HS 2017
Anguilla	10%		2021 · HS 2017
Antigua & Barbuda	5%		2021 · HS 2007
Argentina	7.7%	2% – 12%	2023 · HS 2017
Armenia	1.5%	0% – 3%	2023
Aruba	6%		2021 · HS 2012
Australia	0%		2023
Azerbaijan	0%		2023 · HS 2017
Bahamas	45%		2022
Bahrain	5%		2023
Bangladesh	5%		2023 · HS 2017
Barbados	5%		2022 · HS 2017
Belarus	1.5%	0% – 3%	2021 · HS 2017
Belize	5%		2023
Benin	5%		2023
Bermuda	25%		2023
Bhutan	10%		2022
Bolivia	5%		2023 · HS 2017
Bosnia & Herzegovina	5%		2022
Botswana	0%		2023
Brazil	9.1%	2% – 12%	2023 · HS 2017
Brunei	0%		2023 · HS 2017
Burkina Faso	5%		2023
Burundi	0%		2023
Cambodia	7%		2023 · HS 2017
Cameroon	10%		2023
Canada	0%		2023
Cape Verde	5%		2023 · HS 2017
Cayman Islands	22%		2021 · HS 2002
Central African Republic	10%		2023
Chad	10%		2023
Chile	6%		2023 · HS 2017
China	6.5%		2023
Colombia	0%		2023 · HS 2017
Comoros	20%		2021 · HS 2017
Congo - Brazzaville	10%		2023
Cook Islands	0%		2022 · HS 2017
Costa Rica	0%		2023
Côte d’Ivoire	5%		2023 · HS 2017
Cuba	5%		2023 · HS 2017
Dominica	5%		2023 · HS 2017
Dominican Republic	0%		2023
Ecuador	0%		2023 · HS 2017
Egypt	2%		2019 · HS 2017
El Salvador	0%		2022
Equatorial Guinea	10%		2023
Eswatini	0%		2023
Ethiopia	10%		2021 · HS 2017
European Union (27 countries)	6.5%		2023
Fiji	5%		2023
French Polynesia	8%		2023
Gabon	10%		2023
Gambia	5%		2023
Georgia	0%		2022 · HS 2017
Ghana	5%		2023
Gibraltar	12%		2023 · HS 2017
Grenada	5%		2023 · HS 2012
Guatemala	0%		2023
Guinea	5%		2023
Guinea-Bissau	5%		2023
Guyana	5%		2023 · HS 2017
Haiti	3.5%		2020 · HS 2017
Honduras	0%		2023
Hong Kong SAR China	0%		2023
Iceland	0%		2023
India	7.5%		2023
Indonesia	5%		2023
Iran	5%		2020 · HS 2017
Israel	0%		2022 · HS 2017
Jamaica	0%		2023
Japan	1%	0% – 2%	2023
Jordan	0%		2023
Kazakhstan	3%		2023
Kenya	0%		2023
Kiribati	0%		2023 · HS 2002
Kuwait	5%		2023
Kyrgyzstan	1.5%	0% – 3%	2021 · HS 2017
Laos	5%		2023 · HS 2017
Lebanon	0%		2020 · HS 2017
Lesotho	0%		2023
Liberia	5%		2023
Libya	5%		2021 · HS 2017
Liechtenstein	0%		2021 · HS 2017
Macao SAR China	0%		2023
Madagascar	5%		2023
Malawi	0%		2021 · HS 2017
Malaysia	0%		2023
Maldives	15%		2023
Mali	5%		2023
Mauritania	5%		2023 · HS 2017
Mauritius	0%		2023
Mexico	3.3%	0% – 5%	2023 · HS 2017
Micronesia	4%		2021 · HS 2017
Moldova	6.5%		2023 · HS 2017
Mongolia	5%		2023
Montserrat	0%		2023 · HS 2017
Morocco	2.5%		2023
Mozambique	2.5%		2023
Myanmar (Burma)	3%		2023 · HS 2017
Namibia	0%		2023
Nauru	10%		2021 · HS 2017
Nepal	10%		2023
New Zealand	0%		2023
Nicaragua	0%		2023
Niger	5%		2023
Nigeria	5%		2023
North Macedonia	5%		2023
Norway	0%		2023
Oman	5%		2023
Pakistan	0%		2023
Palau	3%		2023 · HS 2012
Palestinian Territories	0%		2017 · HS 2017
Panama	0%		2023
Papua New Guinea	0%		2023
Paraguay	7.3%	2% – 12%	2023 · HS 2017
Peru	0%		2023 · HS 2017
Philippines	1%		2023
Qatar	5%		2023
Russia	1.5%	0% – 3%	2021 · HS 2017
Rwanda	0%		2023
Samoa	8%		2020 · HS 2017
São Tomé & Príncipe	10%		2019 · HS 2017
Saudi Arabia	5%		2023
Senegal	5%		2023
Seychelles	0%		2023
Sierra Leone	5%		2023
Singapore	0%		2023 · HS 2017
Solomon Islands	5%		2023 · HS 2017
Somalia	5%		2023 · HS 2017
South Africa	0%		2023
South Korea	6.5%		2023
Sri Lanka	0%		2023
St Kitts & Nevis	5%		2023
St Lucia	5%		2023 · HS 2012
St Pierre & Miquelon	8%		2021 · HS 2017
St Vincent & the Grenadines	5%		2023
Sudan	3%		2021 · HS 2017
Suriname	5%		2023 · HS 2007
Switzerland	0%		2023
Syria	1%		2020 · HS 2012
Tajikistan	0%		2021 · HS 2012
Tanzania	0%		2023
Thailand	0%		2023
Togo	5%		2023
Tonga	15%		2023 · HS 2017
Trinidad & Tobago	0%		2023 · HS 2012
Türkiye	6.5%		2023
Tuvalu	0%		2017 · HS 2017
Uganda	0%		2023
Ukraine	6.5%		2023 · HS 2017
United Arab Emirates	5%		2023
United Kingdom	5.5%	0% – 6%	2023
United States	6.2%		2023
Uruguay	9.1%	2% – 12%	2023 · HS 2017
Uzbekistan	0%		2021 · HS 2017
Vanuatu	5%		2023
Venezuela	9.1%	2% – 12%	2023 · HS 2017
Vietnam	0%		2023
Wallis & Futuna	6%		2021 · HS 2012
Yemen	5%		2017 · HS 2017
Zambia	7.5%	0% – 15%	2023
Zimbabwe	0.1%		2023

Tariff data years 2017–2023; rates may have changed since. · UNCTAD TRAINS, accessed via WITS (World Bank)

Classifications and correspondences

Where this HS subheading sits in the United Nations' statistical classifications, and which codes it had in earlier editions of the Harmonized System.

SITC Rev. 4

51481 Quaternary ammonium salts & hydroxides; lecithins & other phosphoaminolipids

End use (BEC Rev. 5)

Intermediate goods · BEC 211220

CPC 2.1 product

35220 Lysine and its esters and salts thereof; glutamic acid and its salts; quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids; acyclic amides and their derivatives and salts thereof; cyclic amides (except ureines) and their derivatives and salts

ISIC Rev. 4 activity

2100 Manufacture of pharmaceuticals, medicinal chemical and botanical products

Earlier HS editions

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 3

Recent rule changes mentioning this code

Acts whose text cites this code or its heading. Check the act itself: a code can be cited for reasons other than a change of its duty.

1. Import and export controls 20 July 2026

   Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

   FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov

2. Quota 30 June 2026 · Applies from: 12 July 2026

   Council Regulation (EU) 2026/1465 of 25 June 2026 amending Regulation (EU) 2021/2283 opening and providing for the management of autonomous tariff quotas of the Union for certain agricultural and industrial products

   CELEX 32026R1465 · Source: eur-lex.europa.eu

3. Tariff change 4 June 2026

   Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

   FR Doc. 2026-11158 · 91 FR 33854 · Source: federalregister.gov

4. Tariff change 20 February 2026

   Update to Autonomous Suspension Coverage. Stop Press – 20 February 2026

   Trade Tariff news 4816 · Source: trade-tariff.service.gov.uk

5. Other 6 January 2026

   Update to MFN Rates added to End-of-Year Commodity Codes – 6 January 2026

   Trade Tariff news 3859 · Source: trade-tariff.service.gov.uk

Rule changes →

Questions and answers