Brazil NCM · 4-digit heading

NCM 29.18 – Carboxylic acids with additional oxygen function

About NCM heading 29.18

Acids; carboxylic acid with additional oxygen function and their anhydrides, halides, peroxides, peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives

Heading 29.18 of Brazil's NCM has 57 eight-digit codes. Official Portuguese description: Ácidos carboxílicos que contenham funções oxigenadas suplementares e seus anidridos, halogenetos, peróxidos e peroxiácidos; seus derivados halogenados, sulfonados, nitrados ou nitrosados.

The first four digits, 2918, identify this heading within chapter 29. 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 29.18 guide.

NCM codes in heading 29.18 57

  1. 2918.1 Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: Ácidos carboxílicos de função álcool, mas sem outra função oxigenada, seus anidridos, halogenetos, peróxidos, peroxiácidos e seus derivados:
  2. 2918.11.00 Lactic acid, its salts and estersÁcido láctico, seus sais e seus ésteres
  3. 2918.12.00 Tartaric acidÁcido tartárico
  4. 2918.13 Acids; carboxylic acids, (with alcohol function but without other oxygen function); salts and esters of tartaric acidSais e ésteres do ácido tartárico HS code
  5. 2918.13.10 Salts of tartaric acidSais
  6. 2918.13.20 Esters of tartaric acidÉsteres
  7. 2918.14.00 Citric acidÁcido cítrico
  8. 2918.15.00 Salts and esters of citric acidSais e ésteres do ácido cítrico
  9. 2918.16 Acids; carboxylic acids, (with alcohol function but without other oxygen function), gluconic acid, its salts and estersÁcido glucônico, seus sais e seus ésteres HS code
  10. 2918.16.10 Calcium gluconateGluconato de cálcio
  11. 2918.16.90 Other gluconic acid, its salts and estersOutros
  12. 2918.17.00 Benzilic acid (2,2-diphenyl-2-hydroxyacetic acid)Ácido 2,2-difenil-2-hidroxiacético (ácido benzílico)
  13. 2918.18.00 Chlorobenzilate (ISO)Clorobenzilato (ISO)
  14. 2918.19 Acids; carboxylic acids, (with alcohol function but without other oxygen function), other than lactic, tartaric, citric, and gluconic acids and their salts and estersOutros HS code
  15. 2918.19.10 BromopropylateBromopropilato
  16. 2918.19.2 Bile acids, their salts and esters; derivatives of these products Ácidos biliares, seus sais e seus ésteres; derivados destes produtos
  17. 2918.19.21 Ursodiol (ursodeoxycholic acid)Ursodiol (ácido ursodeoxicólico)
  18. 2918.19.22 Chenodeoxycholic acidÁcido quenodeoxicólico
  19. 2918.19.29 Other bile acids, salts, esters and derivativesOutros
  20. 2918.19.30 12-Hydroxystearic acidÁcido 12-hidroxiesteárico
  21. 2918.19.4 Salts and esters of 2,2-diphenyl-2-hydroxyacetic acid (benzilic acid) Sais e ésteres do ácido 2,2-difenil-2-hidroxiacético (ácido benzílico)
  22. 2918.19.42 Salts of benzilic acidSais
  23. 2918.19.43 Esters of benzilic acidÉsteres
  24. 2918.19.90 Other alcohol-function carboxylic acidsOutros
  25. 2918.2 Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: Ácidos carboxílicos de função fenol, mas sem outra função oxigenada, seus anidridos, halogenetos, peróxidos, peroxiácidos e seus derivados:
  26. 2918.21 Acids; carboxylic acids, (with phenol function but without other oxygen function), salicylic acid and its saltsÁcido salicílico e seus sais HS code
  27. 2918.21.10 Salicylic acidÁcido salicílico
  28. 2918.21.20 Salts of salicylic acidSais
  29. 2918.22 Acids; carboxylic acids, (with phenol function but without other oxygen function), o-acetylsalicylic acid, its salts and estersÁcido o-acetilsalicílico, seus sais e seus ésteres HS code
  30. 2918.22.1 o-Acetylsalicylic acid and its salts Ácido o-acetilsalicílico e seus sais
  31. 2918.22.11 o-Acetylsalicylic acid (aspirin)Ácido o-acetilsalicílico
  32. 2918.22.12 Aluminium o-acetylsalicylateo-Acetilsalicilato de alumínio
  33. 2918.22.19 Other salts of o-acetylsalicylic acidOutros
  34. 2918.22.20 Esters of o-acetylsalicylic acidÉsteres
  35. 2918.23.00 Other esters of salicylic acid and their saltsOutros ésteres do ácido salicílico e seus sais
  36. 2918.29 Acids; carboxylic acids, (with phenol function but without other oxygen function), their anhydrides, halides, peroxides, peroxyacids and their derivatives, n.e.c. in item no. 2918.2Outros HS code
  37. 2918.29.10 Hydroxynaphthoic acidsÁcidos hidroxinaftoicos
  38. 2918.29.2 p-Hydroxybenzoic acid, its salts and esters Ácido p-hidroxibenzoico, seus sais e seus ésteres
  39. 2918.29.21 p-Hydroxybenzoic acidÁcido p-hidroxibenzoico
  40. 2918.29.22 MethylparabenMetilparabeno
  41. 2918.29.23 PropylparabenPropilparabeno
  42. 2918.29.29 Other p-hydroxybenzoic acid salts and estersOutros
  43. 2918.29.30 Gallic acid, its salts and estersÁcido gálico, seus sais e seus ésteres
  44. 2918.29.40 Pentaerythrityl tetrakis(hydroxyphenylpropionate)Tetrakis(3-(3,5-di-ter-butil-4-hidroxifenil)propionato) de pentaeritritila
  45. 2918.29.50 Octadecyl di-tert-butylhydroxyphenylpropionate3-(3,5-Di-ter-butil-4-hidroxifenil)propionato de octadecila
  46. 2918.29.90 Other phenol-function carboxylic acidsOutros
  47. 2918.30 Acids; carboxylic acids, (with aldehyde or ketone function but without other oxygen function), their anhydrides, halides, peroxides, peroxyacids and their derivativesÁcidos carboxílicos de função aldeído ou cetona, mas sem outra função oxigenada, seus anidridos, halogenetos, peróxidos, peroxiácidos e seus derivados HS code
  48. 2918.30.10 KetoprofenCetoprofeno
  49. 2918.30.20 Methyl butyrylacetateButirilacetato de metila
  50. 2918.30.3 Dehydrocholic acid and its salts Ácido deidrocólico e seus sais
  51. 2918.30.31 Dehydrocholic acidÁcido deidrocólico
  52. 2918.30.32 Sodium dehydrocholateDeidrocolato de sódio
  53. 2918.30.33 Magnesium dehydrocholateDeidrocolato de magnésio
  54. 2918.30.39 Other salts of dehydrocholic acidOutros
  55. 2918.30.40 2-Nitromethylbenzylidene acetylacetateAcetilacetato de 2-nitrometilbenzilideno
  56. 2918.30.90 Other aldehyde/ketone-function carboxylic acidsOutros
  57. 2918.9 Other: Outros:
  58. 2918.91.00 2,4,5-T (ISO), its salts and esters2,4,5-T (ISO) (ácido 2,4,5-triclorofenoxiacético), seus sais e seus ésteres
  59. 2918.99 Acids; carboxylic acids, with additional oxygen function (not alcohol, phenol, aldehyde or ketone) and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives; other than 2,4,5-T (ISO)Outros HS code
  60. 2918.99.1 Phenoxyacetic acid, its salts and esters; derivatives of these products Ácido fenoxiacético, seus sais e seus ésteres; derivados destes produtos
  61. 2918.99.11 Phenoxyacetic acid, its salts and estersÁcido fenoxiacético, seus sais e seus ésteres
  62. 2918.99.12 2,4-D, its salts and estersÁcido 2,4-diclorofenoxiacético (2,4-D), seus sais e seus ésteres
  63. 2918.99.19 Other phenoxyacetic acid derivativesOutros
  64. 2918.99.2 Phenoxybutanoic acids, their salts and esters; derivatives of these products Ácidos fenoxibutanoicos, seus sais e seus ésteres; derivados destes produtos
  65. 2918.99.21 Dichlorophenoxybutanoic acids, salts and estersÁcidos diclorofenoxibutanoicos, seus sais e seus ésteres
  66. 2918.99.29 Other phenoxybutanoic acids and derivativesOutros
  67. 2918.99.30 Acifluorfen-sodiumAcifluorfen sódico
  68. 2918.99.40 NaproxenNaproxeno
  69. 2918.99.50 3-(2-Chloro-4-trifluoromethylphenoxy)benzoic acidÁcido 3-(2-cloro-alfa, alfa, alfa-trifluor-p-toliloxi)benzoico
  70. 2918.99.60 Diclofop-methylDiclofop-metila
  71. 2918.99.9 Other Outros
  72. 2918.99.91 FenofibrateFenofibrato
  73. 2918.99.92 Methylchlorophenoxyacetic acids, salts and estersÁcidos metilclorofenoxiacéticos, seus sais e seus ésteres
  74. 2918.99.93 Lactofen5-(2-Cloro-4-trifluorometilfenoxi)-2-nitrobenzoato de 1'-(carboetoxi)etila (lactofen)
  75. 2918.99.94 4-(4-Hydroxyphenoxy)-3,5-diiodophenylacetic acidÁcido 4-(4-hidroxifenoxi)-3,5-di-iodofenilacético
  76. 2918.99.99 Other carboxylic acids with extra oxygen functionOutros

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.