Brazil NCM · 8-digit subitem

NCM 2934.20.31 – N-tert-Butylbenzothiazole sulphenamide (TBBS)

NCM 2934.20.31 (also written 29342031) is Brazil's code for n-tert-Butylbenzothiazole sulphenamide (TBBS). Its first 6 digits are HS code 2934.20.

Official description of NCM 2934.20.31

PortuguêsOfficial
2-(Terbutilaminotio)benzotiazol (N-terbutil-benzotiazol-sulfenamida)
EnglishUnofficial translation

2-(tert-Butylaminothio)benzothiazole (N-tert-butyl-benzothiazole-sulphenamide)

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

How to read NCM 2934.20.31

29Chapter 34Heading 20Subheading

HS code 2934.20
Same in every country

3Item 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 29 Organic chemicals Produtos químicos orgânicos.
  2. Heading 29.34 Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds Ácidos nucleicos e seus sais, de constituição química definida ou não; outros compostos heterocíclicos.
  3. Subheading 2934.20 Heterocyclic compounds; containing in the structure, a benzothiazole ring-system (whether or not hydrogenated), not further fused Compostos cuja estrutura contém ciclos benzotiazol (hidrogenados ou não) sem outras condensações
  4. Item 2934.20.3 Benzothiazole sulphenamides Benzotiazol sulfenamidas
  5. Subitem 2934.20.31 2-(tert-Butylaminothio)benzothiazole (N-tert-butyl-benzothiazole-sulphenamide) 2-(Terbutilaminotio)benzotiazol (N-terbutil-benzotiazol-sulfenamida)

Other NCM codes under HS 2934.20

2934.20.10 2-Mercaptobenzothiazole and its salts2-Mercaptobenzotiazol e seus sais 2934.20.20 Benzothiazyl disulphide (MBTS)2,2'-Ditio-bis(benzotiazol) (dissulfeto de benzotiazila) 2934.20.32 N-Cyclohexylbenzothiazole sulphenamide (CBS)2-(Cicloexilaminotio)benzotiazol (N-cicloexil-benzotiazol-sulfenamida) 2934.20.33 N,N-Dicyclohexylbenzothiazole sulphenamide2-(Dicicloexilaminotio)benzotiazol (N,N-dicicloexil-benzotiazol-sulfenamida) 2934.20.34 N-Oxydiethylenebenzothiazole sulphenamide (MBS)2-(4-Morfoliniltio)benzotiazol (N-oxidietileno-benzotiazol-sulfenamida) 2934.20.39 Other benzothiazole sulphenamidesOutras 2934.20.40 2-(Thiocyanomethylthio)benzothiazole (TCMTB)2-(Tiocianometiltio)benzotiazol (TCMTB) 2934.20.90 Other benzothiazole ring compoundsOutros

Questions about NCM 2934.20.31

What is NCM 2934.20.31?

NCM 2934.20.31 (29342031) is the Brazilian (Mercosur) code for n-tert-Butylbenzothiazole sulphenamide (TBBS). Its official Portuguese description is “2-(Terbutilaminotio)benzotiazol (N-terbutil-benzotiazol-sulfenamida)”.

What is the HS code for NCM 2934.20.31?

HS 2934.20 (Heterocyclic compounds; containing in the structure, a benzothiazole ring-system (whether or not hydrogenated), not further fused). 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 2934.20.31?

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.