Brazil NCM · 8-digit subitem

NCM 3910.00.11 – Silicone oil prepolymer mixtures, MW up to 8,800

NCM 3910.00.11 (also written 39100011) is Brazil's code for silicone oil prepolymer mixtures, MW up to 8,800. Its first 6 digits are HS code 3910.00.

Official description of NCM 3910.00.11

PortuguêsOfficial
Misturas de pré-polímeros lineares e cíclicos, obtidos por hidrólise de dimetildiclorosilano, de peso molecular médio inferior ou igual a 8.800
EnglishUnofficial translation

Mixtures of linear and cyclic prepolymers, obtained by hydrolysis of dimethyldichlorosilane, of an average molecular weight not exceeding 8,800

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

How to read NCM 3910.00.11

39Chapter 10Heading 00Subheading

HS code 3910.00
Same in every country

1Item 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 39 Plastics and articles thereof Plástico e suas obras.
  2. Heading 39.10 Silicones in primary forms Silicones em formas primárias.
  3. Subheading 3910.00 Silicones; in primary forms Silicones em formas primárias.
  4. Item 3910.00.1 Oils Óleos
  5. Subitem 3910.00.11 Mixtures of linear and cyclic prepolymers, obtained by hydrolysis of dimethyldichlorosilane, of an average molecular weight not exceeding 8,800 Misturas de pré-polímeros lineares e cíclicos, obtidos por hidrólise de dimetildiclorosilano, de peso molecular médio inferior ou igual a 8.800

Other NCM codes under HS 3910.00

3910.00.12 Polydimethylsiloxane/PMHS oils in dispersionPolidimetilsiloxano, polimetilidrogenosiloxano ou misturas destes produtos, em dispersão 3910.00.13 Dimethylsiloxane-vinyl oils, 1,000,000 cSt or moreCopolímeros de dimetilsiloxano com compostos vinílicos, de viscosidade igual ou superior a 1.000.000 cSt 3910.00.19 Other silicone oilsOutros 3910.00.21 Hot-vulcanising silicone elastomersDe vulcanização a quente 3910.00.29 Other silicone elastomersOutros 3910.00.30 Silicone resins in primary formsResinas 3910.00.90 Other silicones in primary formsOutros

Questions about NCM 3910.00.11

What is NCM 3910.00.11?

NCM 3910.00.11 (39100011) is the Brazilian (Mercosur) code for silicone oil prepolymer mixtures, MW up to 8,800. Its official Portuguese description is “Misturas de pré-polímeros lineares e cíclicos, obtidos por hidrólise de dimetildiclorosilano, de peso molecular médio inferior ou igual a 8.800”.

What is the HS code for NCM 3910.00.11?

HS 3910.00 (Silicones; in primary forms). 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 3910.00.11?

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.