Brazil NCM · 8-digit subitem

NCM 2831.90.10 – Zinc dithionite

NCM 2831.90.10 (also written 28319010) is Brazil's code for zinc dithionite. Its first 6 digits are HS code 2831.90.

Official description of NCM 2831.90.10

PortuguêsOfficial
Ditionito de zinco
EnglishUnofficial translation

Zinc dithionite

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

How to read NCM 2831.90.10

28Chapter 31Heading 90Subheading

HS code 2831.90
Same in every country

1Item 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 28 Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes Produtos químicos inorgânicos; compostos inorgânicos ou orgânicos de metais preciosos, de elementos radioativos, de metais das terras raras ou de isótopos.
  2. Heading 28.31 Dithionites and sulphoxylates Ditionitos e sulfoxilatos.
  3. Subheading 2831.90 Dithionites and sulphoxylates; other than sodium Outros
  4. Subitem 2831.90.10 Zinc dithionite Ditionito de zinco

Other NCM codes under HS 2831.90

2831.90.90 Other dithionites and sulphoxylatesOutros

Questions about NCM 2831.90.10

What is NCM 2831.90.10?

NCM 2831.90.10 (28319010) is the Brazilian (Mercosur) code for zinc dithionite. Its official Portuguese description is “Ditionito de zinco”.

What is the HS code for NCM 2831.90.10?

HS 2831.90 (Dithionites and sulphoxylates; other than sodium). 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 2831.90.10?

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.