Brazil NCM · 8-digit subitem

NCM 3921.90.13 – PTFE-reinforced electrolysis membrane sheets

NCM 3921.90.13 (also written 39219013) is Brazil's code for pTFE-reinforced electrolysis membrane sheets. Its first 6 digits are HS code 3921.90.

Official description of NCM 3921.90.13

PortuguêsOfficial
De copolímeros de tetrafluoretileno reforçadas com tecido de fibras de politetrafluoretileno, do tipo utilizado como membranas semipermeáveis em células de eletrólise
EnglishUnofficial translation

Of tetrafluoroethylene copolymers reinforced with a fabric of polytetrafluoroethylene fibres, of a kind used as semi-permeable membranes in electrolysis cells

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

How to read NCM 3921.90.13

39Chapter 21Heading 90Subheading

HS code 3921.90
Same in every country

1Item 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 39 Plastics and articles thereof Plástico e suas obras.
  2. Heading 39.21 Plastic plates, sheets, film, foil and strip n.e.c. in chapter 39 Outras chapas, folhas, películas, tiras e lâminas, de plástico.
  3. Subheading 3921.90 Plastics; plates, sheets, film, foil and strip, other than cellular Outras
  4. Item 3921.90.1 Laminated, reinforced or supported Estratificadas, reforçadas ou com suporte
  5. Subitem 3921.90.13 Of tetrafluoroethylene copolymers reinforced with a fabric of polytetrafluoroethylene fibres, of a kind used as semi-permeable membranes in electrolysis cells De copolímeros de tetrafluoretileno reforçadas com tecido de fibras de politetrafluoretileno, do tipo utilizado como membranas semipermeáveis em células de eletrólise

Other NCM codes under HS 3921.90

3921.90.11 Melamine-formaldehyde, laminated/reinforced/backedDe resina melamina-formaldeído 3921.90.12 Cross-ply polyethylene fibre-reinforced sheetsDe polietileno, com reforço de napas de fibras de polietileno paralelizadas, superpostas entre si em ângulo de 90º e impregnadas com resinas 3921.90.19 Other laminated, reinforced or supported plasticsOutras 3921.90.20 PET film, gelatin/latex antistatic on both facesDe poli(tereftalato de etileno), com camada antiestática à base de gelatina ou de látex em ambas as faces, mesmo com halogenetos de potássio 3921.90.90 Other non-cellular plastic plates and sheetsOutras

Questions about NCM 3921.90.13

What is NCM 3921.90.13?

NCM 3921.90.13 (39219013) is the Brazilian (Mercosur) code for pTFE-reinforced electrolysis membrane sheets. Its official Portuguese description is “De copolímeros de tetrafluoretileno reforçadas com tecido de fibras de politetrafluoretileno, do tipo utilizado como membranas semipermeáveis em células de eletrólise”.

What is the HS code for NCM 3921.90.13?

HS 3921.90 (Plastics; plates, sheets, film, foil and strip, other than cellular). 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 3921.90.13?

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.