Code 2923 40 · Heading 2923

Didecyldimethylammonium perfluorooctanesulfonate

This code covers the specifically named chemical compound didecyldimethylammonium perfluorooctanesulfonate. It is a product within the group of quaternary ammonium salts and quaternary ammonium hydroxides.

For example

Didecyldimethylammonium perfluorooctanesulfonate

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See the official tariff text

Official tariff text

Didecyldimethylammonium perfluorooctane sulphonate

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section VI Products of the chemical or allied industries
Is it an inorganic or organic chemical; a pharmaceutical product; a fertilizer; a tanning or dye extract, pigment, paint, varnish, filler or printing ink; an essential oil, perfume, cosmetic or toilet product; soap, a surface-active, washing, cleaning, polishing or wax product; a protein, modified starch, glue or enzyme; an explosive, pyrotechnic article, match or other specified combustible material; a photographic or cinematographic product; or another chemical product?
✓
Step 2 · Chapter 29 Organic chemicals 2 of 11 chapters in section VI
What type of organic chemical is it—for example, a hydrocarbon, alcohol, acid, nitrogen compound, sulfur compound, heterocyclic compound, vitamin, hormone, glycoside, plant alkaloid, sugar, antibiotic or another listed organic compound?
✓
Step 3 · Heading 2923 Quaternary ammonium salts and hydroxides; lecithins… 23 of 42 headings under chapter 29
Is it choline or a choline salt; a lecithin or other phosphoaminolipid; tetraethylammonium perfluorooctanesulfonate; didecyldimethylammonium perfluorooctanesulfonate; or another quaternary ammonium salt or quaternary ammonium hydroxide?
✓
Step 4 · Subheading 2923 40 Didecyldimethylammonium perfluorooctane sulphonate 4 of 5 subheadings under heading 2923
Is the product didecyldimethylammonium perfluorooctanesulfonate?

Full 8-digit codes

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1 code below this one

2923 40 00 Didecyldimethylammonium perfluorooctane sulphonate 6.5% Save

Compare the sibling codes

Classification decides the rate here: from 0.0% to 6.5%.

2923 10 Choline and its salts 6.5%
2923 20 Lecithins and other phosphoaminolipids, whether or not chemically defined 0.0%
2923 30 Tetraethylammonium perfluorooctane sulphonate 6.5%
2923 40 Didecyldimethylammonium perfluorooctane sulphonate you are here 6.5%
2923 90 Quaternary ammonium salts and hydroxides (excl. choline and its salts, tetraethylammonium perfluorooctane sulphonate and didecyldimethylammonium perfluorooctane sulphonate) No rate on file

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

29.23.4000

Didecyldimethylammonium perfluorooctane sulphonate

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 9, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

2923 40 00 00

Didecyldimethylammonium perfluorooctane sulphonate

Ordinary duty

6.0%

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 v4.0.1576, last checked Aug. 3, 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).

Check the neighbouring codes

The codes just before and after this one, in case a nearby group fits better.

See all 5 codes at this level

Previous code 2923 30

Tetraethylammonium perfluorooctane sulphonate

you are here 2923 40

Didecyldimethylammonium perfluorooctane sulphonate

Next code 2923 90

Quaternary ammonium salts and hydroxides (excl. choline and its salts…

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, 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.