Brazil NCM · 8-digit subitem

NCM 3816.00.21 – Graphite refractory mixes, 50 % or more corundum

NCM 3816.00.21 (also written 38160021) is Brazil's code for graphite refractory mixes, 50 % or more corundum. Its first 6 digits are HS code 3816.00.

Official description of NCM 3816.00.21

PortuguêsOfficial
Que contenham grafita e 50 % ou mais, em peso, de coríndon
EnglishUnofficial translation

Containing graphite and 50 % or more, by weight, of corundum

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

How to read NCM 3816.00.21

38Chapter 16Heading 00Subheading

HS code 3816.00
Same in every country

2Item 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 38 Chemical products n.e.c. Produtos diversos das indústrias químicas.
  2. Heading 38.16 Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01 Cimentos, argamassas, concretos (betões) e composições semelhantes, refratários, incluindo os aglomerados de dolomita, exceto os produtos da posição 38.01.
  3. Subheading 3816.00 Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01 Cimentos, argamassas, concretos (betões) e composições semelhantes, refratários, incluindo os aglomerados de dolomita, exceto os produtos da posição 38.01.
  4. Item 3816.00.2 Other preparations based on chrome-magnesite, zirconium, sillimanite, kyanite, andalusite, corundum or diaspore Outras preparações à base de cromo-magnesita, de zircônio, de silimanita, de cianita, de andaluzita, de coríndon ou de diaspório
  5. Subitem 3816.00.21 Containing graphite and 50 % or more, by weight, of corundum Que contenham grafita e 50 % ou mais, em peso, de coríndon

Other NCM codes under HS 3816.00

3816.00.11 Magnesite-based refractory cements and mortarsÀ base de magnesita calcinada 3816.00.12 Sillimanite refractory cements and mortarsÀ base de silimanita 3816.00.19 Other refractory cements and mortarsOutros 3816.00.29 Other chrome-magnesite, corundum etc. refractoriesOutras 3816.00.90 Other refractory concretes and compositionsOutros

Questions about NCM 3816.00.21

What is NCM 3816.00.21?

NCM 3816.00.21 (38160021) is the Brazilian (Mercosur) code for graphite refractory mixes, 50 % or more corundum. Its official Portuguese description is “Que contenham grafita e 50 % ou mais, em peso, de coríndon”.

What is the HS code for NCM 3816.00.21?

HS 3816.00 (Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01). 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 3816.00.21?

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.