Brazil NCM · 8-digit subitem

NCM 2837.20.23 – Ferric ferricyanide

NCM 2837.20.23 (also written 28372023) is Brazil's code for ferric ferricyanide. Its first 6 digits are HS code 2837.20.

Official description of NCM 2837.20.23

PortuguêsOfficial
De ferro III (ferricianeto férrico)
EnglishUnofficial translation

Of iron(III) (ferric ferricyanide)

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

How to read NCM 2837.20.23

28Chapter 37Heading 20Subheading

HS code 2837.20
Same in every country

2Item 3Subitem

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 28.37 Cyanides, cyanide oxides and complex cyanides Cianetos, oxicianetos e cianetos complexos.
  3. Subheading 2837.20 Complex cyanides Cianetos complexos
  4. Item 2837.20.2 Ferricyanides Ferricianetos
  5. Subitem 2837.20.23 Of iron(III) (ferric ferricyanide) De ferro III (ferricianeto férrico)

Other NCM codes under HS 2837.20

2837.20.11 Sodium ferrocyanideDe sódio 2837.20.12 Ferrous ferrocyanideDe ferro II (ferrocianeto ferroso) 2837.20.19 Other ferrocyanidesOutros 2837.20.21 Potassium ferricyanideDe potássio 2837.20.22 Ferrous ferricyanideDe ferro II (ferricianeto ferroso) 2837.20.29 Other ferricyanidesOutros 2837.20.90 Other complex cyanidesOutros

Questions about NCM 2837.20.23

What is NCM 2837.20.23?

NCM 2837.20.23 (28372023) is the Brazilian (Mercosur) code for ferric ferricyanide. Its official Portuguese description is “De ferro III (ferricianeto férrico)”.

What is the HS code for NCM 2837.20.23?

HS 2837.20 (Complex cyanides). 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 2837.20.23?

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.