Brazil NCM · 8-digit subitem

NCM 8421.99.91 – Reverse osmosis membrane cartridges

NCM 8421.99.91 (also written 84219991) is Brazil's code for reverse osmosis membrane cartridges. Its first 6 digits are HS code 8421.99.

Official description of NCM 8421.99.91

PortuguêsOfficial
Cartuchos de membrana de aparelhos de osmose inversa
EnglishUnofficial translation

Membrane cartridges for reverse osmosis apparatus

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

How to read NCM 8421.99.91

84Chapter 21Heading 99Subheading

HS code 8421.99
Same in every country

9Item 1Subitem

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 84 Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof Reatores nucleares, caldeiras, máquinas, aparelhos e instrumentos mecânicos, e suas partes.
  2. Heading 84.21 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases Centrifugadores, incluindo os secadores centrífugos; aparelhos para filtrar ou depurar líquidos ou gases.
  3. Group 8421.9 Parts: Partes:
  4. Subheading 8421.99 Machinery; parts for filtering or purifying liquids or gases Outras
  5. Item 8421.99.9 Other Outras
  6. Subitem 8421.99.91 Membrane cartridges for reverse osmosis apparatus Cartuchos de membrana de aparelhos de osmose inversa

Other NCM codes under HS 8421.99

8421.99.10 Parts of other gas filtering apparatusDe aparelhos para filtrar ou depurar gases, da subposição 8421.39 8421.99.20 Filter parts for haemodialysis blood linesDo tipo utilizado em linhas de sangue para hemodiálise 8421.99.99 Other parts of filtering or purifying machineryOutras

Questions about NCM 8421.99.91

What is NCM 8421.99.91?

NCM 8421.99.91 (84219991) is the Brazilian (Mercosur) code for reverse osmosis membrane cartridges. Its official Portuguese description is “Cartuchos de membrana de aparelhos de osmose inversa”.

What is the HS code for NCM 8421.99.91?

HS 8421.99 (Machinery; parts for filtering or purifying liquids or gases). 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 8421.99.91?

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.