Brazil NCM · 8-digit code

NCM 2901.23.00 – Butene (butylene) and its isomers

NCM 2901.23.00 (also written 29012300) is Brazil's code for butene (butylene) and its isomers. Its first 6 digits are HS code 2901.23.

Official description of NCM 2901.23.00

PortuguêsOfficial
Buteno (butileno) e seus isômeros
EnglishUnofficial translation

Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof

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

How to read NCM 2901.23.00

29Chapter 01Heading 23Subheading

HS code 2901.23
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 29.01 Acyclic hydrocarbons Hidrocarbonetos acíclicos.
  3. Group 2901.2 Unsaturated: Não saturados:
  4. Subheading 2901.23 Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof
  5. Subitem 2901.23.00 Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof Buteno (butileno) e seus isômeros

Questions about NCM 2901.23.00

What is NCM 2901.23.00?

NCM 2901.23.00 (29012300) is the Brazilian (Mercosur) code for butene (butylene) and its isomers. Its official Portuguese description is “Buteno (butileno) e seus isômeros”.

What is the HS code for NCM 2901.23.00?

HS 2901.23 (Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof). 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 2901.23.00?

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.