Brazil NCM · 8-digit code

NCM 2923.40.00 – Didecyldimethylammonium perfluorooctane sulphonate

NCM 2923.40.00 (also written 29234000) is Brazil's code for didecyldimethylammonium perfluorooctane sulphonate. Its first 6 digits are HS code 2923.40.

Official description of NCM 2923.40.00

PortuguêsOfficial
Perfluoroctanossulfonato de didecildimetilamônio
EnglishUnofficial translation

Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined

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

How to read NCM 2923.40.00

29Chapter 23Heading 40Subheading

HS code 2923.40
Same in every country

0Item 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. The last two digits are 00 because Brazil does not split this HS code further. 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 2923.40 Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined
  4. Subitem 2923.40.00 Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined Perfluoroctanossulfonato de didecildimetilamônio

Questions about NCM 2923.40.00

What is NCM 2923.40.00?

NCM 2923.40.00 (29234000) is the Brazilian (Mercosur) code for didecyldimethylammonium perfluorooctane sulphonate. Its official Portuguese description is “Perfluoroctanossulfonato de didecildimetilamônio”.

What is the HS code for NCM 2923.40.00?

HS 2923.40 (Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined). 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 2923.40.00?

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.