Brazil NCM · 4-digit heading

NCM 28.11 – Other inorganic acids; non-metal oxygen compounds

About NCM heading 28.11

Inorganic acids and other inorganic oxygen compounds of non-metals; n.e.c. in heading no. 2806 to 2810

Heading 28.11 of Brazil's NCM has 14 eight-digit codes. Official Portuguese description: Outros ácidos inorgânicos e outros compostos oxigenados inorgânicos dos elementos não metálicos.

The first four digits, 2811, identify this heading within chapter 28. Its six-digit subheadings follow the international HS system; the final two digits distinguish Mercosur's NCM classifications. Select a code below to read its English translation, official Portuguese text and full classification path.

For product coverage and classification context, read the HS heading 28.11 guide.

NCM codes in heading 28.11 14

  1. 2811.1 Other inorganic acids: Outros ácidos inorgânicos:
  2. 2811.11.00 Hydrogen fluoride (hydrofluoric acid)Fluoreto de hidrogênio (ácido fluorídrico)
  3. 2811.12.00 Hydrogen cyanide (hydrocyanic acid)Cianeto de hidrogênio (ácido cianídrico ou ácido hidrociânico)
  4. 2811.19 Inorganic acids; other than hydrogen fluorideOutros HS code
  5. 2811.19.10 Sulphamic acid (aminosulphonic acid)Ácido aminossulfônico (ácido sulfâmico)
  6. 2811.19.20 Phosphonic acid (phosphorous acid)Ácido fosfônico (ácido fosforoso)
  7. 2811.19.30 Perchloric acidÁcido perclórico
  8. 2811.19.40 Fluoro-acids and other fluorine compoundsFluorácidos e outros compostos de flúor
  9. 2811.19.90 Other inorganic acidsOutros
  10. 2811.2 Other inorganic oxygen compounds of non-metals: Outros compostos oxigenados inorgânicos dos elementos não metálicos:
  11. 2811.21.00 Carbon dioxideDióxido de carbono
  12. 2811.22 Silicon dioxideDióxido de silício HS code
  13. 2811.22.10 Precipitated silicon dioxide (silica)Obtido por precipitação química
  14. 2811.22.20 Silica aerogelTipo aerogel
  15. 2811.22.30 Silica gelGel de sílica
  16. 2811.22.90 Other silicon dioxideOutros
  17. 2811.29 Inorganic oxygen compounds; of non-metals, n.e.c. in item no. 2811.2Outros HS code
  18. 2811.29.10 Sulphur dioxideDióxido de enxofre
  19. 2811.29.90 Other inorganic oxygen compounds of non-metalsOutros

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.