Brazil NCM · 8-digit subitem

NCM 2921.51.33 – N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine

NCM 2921.51.33 (also written 29215133) is Brazil's code for n-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine. Its first 6 digits are HS code 2921.51.

Official description of NCM 2921.51.33

PortuguêsOfficial
N-(1,3-Dimetilbutil)-N'-fenil-p-fenilenodiamina
EnglishUnofficial translation

N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine

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

How to read NCM 2921.51.33

29Chapter 21Heading 51Subheading

HS code 2921.51
Same in every country

3Item 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 29 Organic chemicals Produtos químicos orgânicos.
  2. Heading 29.21 Amine-function compounds Compostos de função amina.
  3. Group 2921.5 Aromatic polyamines and their derivatives; salts thereof: Poliaminas aromáticas e seus derivados; sais destes produtos:
  4. Subheading 2921.51 Amine-function compounds; aromatic amines and their derivatives; o-, m-, p-phenylenediamine, diaminotoluenes and their derivatives; salts thereof o-, m-, p-Fenilenodiamina, diaminotoluenos, e seus derivados; sais destes produtos
  5. Item 2921.51.3 Other derivatives of phenylenediamines; salts thereof Outros derivados das fenilenodiaminas; sais destes produtos
  6. Subitem 2921.51.33 N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine N-(1,3-Dimetilbutil)-N'-fenil-p-fenilenodiamina

Other NCM codes under HS 2921.51

2921.51.11 m-Phenylenediamine and its saltsm-Fenilenodiamina e seus sais 2921.51.12 Diaminotoluenes (toluylenediamines)Diaminotoluenos (toluilenodiaminas) 2921.51.19 Other phenylenediamines, diaminotoluenes and saltsOutros 2921.51.20 Sulphonated phenylenediamine derivatives; saltsDerivados sulfonados das fenilenodiaminas e de seus derivados; sais destes produtos 2921.51.31 N,N'-Di-sec-butyl-p-phenylenediamineN,N'-Di-sec-butil-p-fenilenodiamina 2921.51.32 N-Isopropyl-N'-phenyl-p-phenylenediamine (IPPD)N-Isopropil-N'-fenil-p-fenilenodiamina 2921.51.34 4-(1,4-Dimethylpentylamino)diphenylamine (7PPD)N-(1,4-Dimetilpentil)-N'-fenil-p-fenilenodiamina 2921.51.35 N-Phenyl-p-phenylenediamine and its saltsN-Fenil-p-fenilenodiamina (4-aminodifenilamina) e seus sais 2921.51.39 Other phenylenediamine derivatives and saltsOutros 2921.51.90 Other diaminotoluene derivatives and their saltsOutros

Questions about NCM 2921.51.33

What is NCM 2921.51.33?

NCM 2921.51.33 (29215133) is the Brazilian (Mercosur) code for n-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine. Its official Portuguese description is “N-(1,3-Dimetilbutil)-N'-fenil-p-fenilenodiamina”.

What is the HS code for NCM 2921.51.33?

HS 2921.51 (Amine-function compounds; aromatic amines and their derivatives; o-, m-, p-phenylenediamine, diaminotoluenes and their derivatives; salts thereof). 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 2921.51.33?

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.