Brazil NCM · 8-digit subitem

NCM 3913.90.50 – Chitosan, its salts or derivatives

NCM 3913.90.50 (also written 39139050) is Brazil's code for chitosan, its salts or derivatives. Its first 6 digits are HS code 3913.90.

Official description of NCM 3913.90.50

PortuguêsOfficial
Quitosana, seus sais ou seus derivados
EnglishUnofficial translation

Chitosan, its salts or its derivatives

Nomenclatura Comum do Mercosul (Siscomex). Updated Oct 2026 · In force since Oct 2026 (Res Gecex 926/2026).

How to read NCM 3913.90.50

39Chapter 13Heading 90Subheading

HS code 3913.90
Same in every country

5Item 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 39 Plastics and articles thereof Plástico e suas obras.
  2. Heading 39.13 Natural polymers (e.g. alginic acid) and modified natural polymers (e.g. hardened proteins, chemical derivatives of natural rubber), n.e.c. or included, in primary forms Polímeros naturais (ácido algínico, por exemplo) e polímeros naturais modificados (por exemplo, proteínas endurecidas, derivados químicos da borracha natural), não especificados nem compreendidos noutras posições, em formas primárias.
  3. Subheading 3913.90 Polymers, natural and modified natural; in primary forms (excluding alginic acid, its salts and esters) Outros
  4. Subitem 3913.90.50 Chitosan, its salts or its derivatives Quitosana, seus sais ou seus derivados

Other NCM codes under HS 3913.90

3913.90.11 Chlorinated/hydrochlorinated rubber, bulk formsBorracha clorada ou cloridratada, nas formas previstas na Nota 6 b) deste Capítulo 3913.90.12 Chlorinated rubber in other formsBorracha clorada, noutras formas 3913.90.19 Other chemical derivatives of natural rubberOutros 3913.90.20 Xanthan gumGoma xantana 3913.90.30 DextranDextrana 3913.90.40 Hardened proteinsProteínas endurecidas 3913.90.60 Chondroitin sulphateSulfato de condroitina 3913.90.90 Other natural or modified natural polymersOutros

Questions about NCM 3913.90.50

What is NCM 3913.90.50?

NCM 3913.90.50 (39139050) is the Brazilian (Mercosur) code for chitosan, its salts or derivatives. Its official Portuguese description is “Quitosana, seus sais ou seus derivados”.

What is the HS code for NCM 3913.90.50?

HS 3913.90 (Polymers, natural and modified natural; in primary forms (excluding alginic acid, its salts and esters)). 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 3913.90.50?

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.