Brazil NCM · 8-digit subitem

NCM 3815.12.10 – Precious-metal honeycomb catalysts for exhausts

NCM 3815.12.10 (also written 38151210) is Brazil's code for precious-metal honeycomb catalysts for exhausts. Its first 6 digits are HS code 3815.12.

Official description of NCM 3815.12.10

PortuguêsOfficial
Em colmeia cerâmica ou metálica para conversão catalítica de gases de escape de veículos
EnglishUnofficial translation

In ceramic or metal honeycomb, for catalytic conversion of vehicle exhaust gases

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

How to read NCM 3815.12.10

38Chapter 15Heading 12Subheading

HS code 3815.12
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 38 Chemical products n.e.c. Produtos diversos das indústrias químicas.
  2. Heading 38.15 Reaction initiators, reaction accelerators and catalytic preparations n.e.c. or included Iniciadores de reação, aceleradores de reação e preparações catalíticas, não especificados nem compreendidos noutras posições.
  3. Group 3815.1 Supported catalysts: Catalisadores em suporte:
  4. Subheading 3815.12 Catalysts, supported; reaction initiators, reaction accelerators and catalytic preparations, with precious metal or precious metal compounds as the active substance, n.e.c. or included Tendo como substância ativa um metal precioso ou um composto de metal precioso
  5. Subitem 3815.12.10 In ceramic or metal honeycomb, for catalytic conversion of vehicle exhaust gases Em colmeia cerâmica ou metálica para conversão catalítica de gases de escape de veículos

Other NCM codes under HS 3815.12

3815.12.20 Precious-metal catalysts, particles under 500 µmCom tamanho de partícula inferior a 500 micrômetros (mícrons) 3815.12.90 Other supported precious-metal catalystsOutros

Questions about NCM 3815.12.10

What is NCM 3815.12.10?

NCM 3815.12.10 (38151210) is the Brazilian (Mercosur) code for precious-metal honeycomb catalysts for exhausts. Its official Portuguese description is “Em colmeia cerâmica ou metálica para conversão catalítica de gases de escape de veículos”.

What is the HS code for NCM 3815.12.10?

HS 3815.12 (Catalysts, supported; reaction initiators, reaction accelerators and catalytic preparations, with precious metal or precious metal compounds as the active substance, n.e.c. or included). 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 3815.12.10?

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.