Brazil NCM · 8-digit subitem

NCM 2923.90.40 – C6-C22 alkyltrimethylammonium halides

NCM 2923.90.40 (also written 29239040) is Brazil's code for c6-C22 alkyltrimethylammonium halides. Its first 6 digits are HS code 2923.90.

Official description of NCM 2923.90.40

PortuguêsOfficial
Halogenetos de alquil-trimetilamônio, com grupo alquila de C6 a C22
EnglishUnofficial translation

Alkyl-trimethylammonium halides, with C6 to C22 alkyl group

Nomenclatura Comum do Mercosul (Siscomex). Updated Oct 2026 · In force since Apr 2022 (Res Gecex 272/2021).

How to read NCM 2923.90.40

29Chapter 23Heading 90Subheading

HS code 2923.90
Same in every country

4Item 0Subitem

Added by Mercosur
Brazil, Argentina, Paraguay, Uruguay

The first 6 digits are the international HS code, so their meaning is the same in every country; Brazil publishes the text in Portuguese. Digits 7 and 8 are Brazil's own split of that HS code. The full 8-digit code is used on import declarations (DUIMP), invoices (NF-e) and tax filings.

Full classification path

  1. Chapter 29 Organic chemicals Produtos químicos orgânicos.
  2. Heading 29.23 Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined Sais e hidróxidos de amônio quaternários; lecitinas e outros fosfoaminolipídios, de constituição química definida ou não.
  3. Subheading 2923.90 Quaternary ammonium salts and hydroxides; whether or not chemically defined n.e.c. in heading no. 2923 Outros
  4. Subitem 2923.90.40 Alkyl-trimethylammonium halides, with C6 to C22 alkyl group Halogenetos de alquil-trimetilamônio, com grupo alquila de C6 a C22

Other NCM codes under HS 2923.90

2923.90.10 Betaine and its saltsBetaína e seus sais 2923.90.20 Choline derivativesDerivados da colina 2923.90.30 3-Chloro-2-hydroxypropyltrimethylammonium chlorideCloreto de 3-cloro-2-hidroxipropiltrimetilamônio 2923.90.50 C6-C22 dialkyldimethyl- or benzalkonium halidesHalogenetos de dialquil-dimetilamônio ou de alquil-benzil-dimetilamônio, com grupo alquila de C6 a C22 2923.90.60 C6-C22 pentamethylalkylpropylenediammonium halidesHalogenetos de pentametil-alquil-propilenodiamônio, com grupo alquila de C6 a C22 2923.90.90 Other quaternary ammonium salts and hydroxidesOutros

Questions about NCM 2923.90.40

What is NCM 2923.90.40?

NCM 2923.90.40 (29239040) is the Brazilian (Mercosur) code for c6-C22 alkyltrimethylammonium halides. Its official Portuguese description is “Halogenetos de alquil-trimetilamônio, com grupo alquila de C₆ a C₂₂”.

What is the HS code for NCM 2923.90.40?

HS 2923.90 (Quaternary ammonium salts and hydroxides; whether or not chemically defined n.e.c. in heading no. 2923). The first 6 digits of an NCM code are its international HS code; the last 2 digits are Brazil's own split.

Is an NCM code the same as an HS code?

The first 6 digits are the same in every country. NCM adds an item digit (7th) and a subitem digit (8th). A code ending in 00 means Brazil does not split that HS code further.

Which countries use NCM 2923.90.40?

All Mercosur members use the same NCM codes: Argentina, Brazil, Paraguay and Uruguay.

Source: Siscomex Classif NCM table, updated Oct 2026 (Resolução Gecex nº 926/2026). The Portuguese text is the official one; the English is our translation.