HS code · 6-digit subheading
HS Code 2923.40 – Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined
HS code 2923.40 is the 6-digit subheading for quaternary ammonium salts and hydroxides, didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined. It is used for didecyldimethylammonium perfluorooctane sulfonate, DDA-PFOS, biocidal quaternary ammonium salts, disinfectant active ingredients and water treatment chemicals.
What HS 2923.40 covers
This HS code specifically identifies didecyldimethylammonium perfluorooctane sulphonate, another specialized quaternary ammonium compound. These chemicals are highly valued in international trade for their unique properties, particularly as potent biocides and disinfectants. They are extensively utilized in the formulation of industrial and institutional cleaning products, water treatment chemicals, and as active ingredients in antimicrobial solutions for healthcare settings and agriculture. Importers include manufacturers of disinfectants, water treatment companies, and agricultural chemical producers, often located in countries with high hygiene standards or significant industrial activity. Exporters are typically specialized chemical companies with expertise in synthesizing complex organic compounds. Key considerations for trade involve stringent regulatory approvals for biocide applications, environmental concerns related to perfluorinated compounds, and the need for high purity to ensure efficacy and safety. The market for these compounds is driven by public health concerns and industrial sanitation requirements.
- Covers
- Didecyldimethylammonium perfluorooctane sulfonate
- DDA-PFOS
- Biocidal quaternary ammonium salts
- Disinfectant active ingredients
- Water treatment chemicals
- Antimicrobial agents
- Examples
- Lonza Didecyldimethylammonium PFOS
- Stepan Company DDA-PFOS
- Evonik Industries Quaternary Ammonium Biocides
Codes often confused with 2923.40
Common mistake. Misclassification can occur with other quaternary ammonium compounds used as disinfectants under 380894 (disinfectants) if not identified as a pure chemical, or with other specific quaternary ammonium salts under 292390 if the exact chemical name is not used.
Top exporters and importers of HS code 292340, 2025
In 2025, the largest exporter of HS code 292340 in UN Comtrade data was Belgium, with 75% of world exports; the largest importer in UN Comtrade data was the Netherlands, with 70% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Belgium $123K 75% of world exports
- 2 Portugal $27K 16% of world exports
- 3 Netherlands $7K 4.1% of world exports
World total: $165K Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Netherlands $679K 70% of world imports
- 2 South Africa $93K 9.6% of world imports
- 3 Angola $70K 7.2% of world imports
World total: $968K Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for 2923.40
Brazil does not split HS 2923.40: its NCM code is 2923.40.00.
All Brazil NCM codes in heading 29.23 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2923.40
What is HS code 292340?
HS code 292340 is a 6-digit subheading in the Harmonized System that covers: Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined. This HS code specifically identifies didecyldimethylammonium perfluorooctane sulphonate, another specialized quaternary ammonium compound. These chemicals are highly valued in international trade for their unique properties, particularly as potent biocides and disinfectants. They are extensively utilized in the formulation of industrial and institutional cleaning products, water treatment chemicals, and as active ingredients in antimicrobial solutions for healthcare settings and agriculture. Importers include manufacturers of disinfectants, water treatment companies, and agricultural chemical producers, often located in countries with high hygiene standards or significant industrial activity. Exporters are typically specialized chemical companies with expertise in synthesizing complex organic compounds. Key considerations for trade involve stringent regulatory approvals for biocide applications, environmental concerns related to perfluorinated compounds, and the need for high purity to ensure efficacy and safety. The market for these compounds is driven by public health concerns and industrial sanitation requirements.
What products fall under HS code 292340?
Didecyldimethylammonium perfluorooctane sulfonate, DDA-PFOS, Biocidal quaternary ammonium salts, Disinfectant active ingredients, Water treatment chemicals, Antimicrobial agents
What are common misclassifications for HS code 292340?
Misclassification can occur with other quaternary ammonium compounds used as disinfectants under 380894 (disinfectants) if not identified as a pure chemical, or with other specific quaternary ammonium salts under 292390 if the exact chemical name is not used.
Which countries are the top exporters of goods under HS code 292340?
In 2025, the top exporters of HS code 292340 in UN Comtrade data were Belgium ($123K, 75% of world exports), Portugal ($27K) and the Netherlands ($7K). World exports came to about $165K, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 292340?
In 2025, the top importers of HS code 292340 in UN Comtrade data were the Netherlands ($679K, 70% of world imports), South Africa ($93K) and Angola ($70K). World imports came to about $968K, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 292340 structured?
HS code 292340 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (23) identify the heading, and digits 5-6 (40) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 292340?
In Brazil, HS code 292340 is NCM 2923.40.00. The last two digits are 00 because Brazil does not split this HS code further.