Brazil NCM · 8-digit subitem

NCM 2904.10.52 – beta-Naphthalenesulphonic acid

NCM 2904.10.52 (also written 29041052) is Brazil's code for beta-Naphthalenesulphonic acid. Its first 6 digits are HS code 2904.10.

Official description of NCM 2904.10.52

PortuguêsOfficial
Ácido beta-naftalenossulfônico
EnglishUnofficial translation

beta-Naphthalenesulphonic acid

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

How to read NCM 2904.10.52

29Chapter 04Heading 10Subheading

HS code 2904.10
Same in every country

5Item 2Subitem

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 29.04 Sulphonated, nitrated or nitrosated derivatives of hydrocarbons; whether or not halogenated Derivados sulfonados, nitrados ou nitrosados dos hidrocarbonetos, mesmo halogenados.
  3. Subheading 2904.10 Derivatives of hydrocarbons; containing only sulpho groups, their salts and ethyl esters, whether or not halogenated Derivados apenas sulfonados, seus sais e seus ésteres etílicos
  4. Item 2904.10.5 Naphthalenesulphonic acids, their salts and their esters Ácidos naftalenossulfônicos, seus sais e seus ésteres
  5. Subitem 2904.10.52 beta-Naphthalenesulphonic acid Ácido beta-naftalenossulfônico

Other NCM codes under HS 2904.10

2904.10.11 Methanesulphonic acidÁcido metanossulfônico 2904.10.12 Lead methanesulphonateMetanossulfonato de chumbo 2904.10.13 Tin methanesulphonateMetanossulfonato de estanho 2904.10.19 Other methanesulphonic acid saltsOutros 2904.10.20 Dodecylbenzenesulphonic acid and its saltsÁcido dodecilbenzenossulfônico e seus sais 2904.10.30 Toluene- and xylenesulphonic acids and saltsÁcidos toluenossulfônicos; ácidos xilenossulfônicos; sais destes ácidos 2904.10.40 Ethanesulphonic and ethylenesulphonic acidsÁcido etanossulfônico; ácido etilenossulfônico 2904.10.51 Sodium naphthalenesulphonatesNaftalenossulfonatos de sódio 2904.10.53 Alkylnaphthalenesulphonic acids and their saltsÁcidos alquil- e dialquilnaftalenossulfônicos; sais destes ácidos 2904.10.59 Other naphthalenesulphonic acids, salts, estersOutros 2904.10.60 Benzenesulphonic acid and its saltsÁcido benzenossulfônico e seus sais 2904.10.90 Other sulpho derivatives of hydrocarbonsOutros

Questions about NCM 2904.10.52

What is NCM 2904.10.52?

NCM 2904.10.52 (29041052) is the Brazilian (Mercosur) code for beta-Naphthalenesulphonic acid. Its official Portuguese description is “Ácido beta-naftalenossulfônico”.

What is the HS code for NCM 2904.10.52?

HS 2904.10 (Derivatives of hydrocarbons; containing only sulpho groups, their salts and ethyl esters, whether or not halogenated). 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 2904.10.52?

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.