HS code · 6-digit subheading

HS Code 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)

HS code 2918.99 is the 6-digit subheading for 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). It is used for ascorbic acid derivatives, gluconic acid derivatives, tartaric acid derivatives, malic acid derivatives and salicylic acid acid derivatives.

What HS 2918.99 covers

This HS code encompasses a broad range of complex carboxylic acids featuring additional oxygen functions (excluding alcohol, phenol, aldehyde, or ketone groups), along with their anhydrides, halides, peroxides, peroxyacids, and various halogenated, sulphonated, nitrated, or nitrosated derivatives. These compounds are crucial intermediates in the chemical industry, finding extensive use in pharmaceuticals, agrochemicals, food additives, and specialty polymers. Major chemical manufacturers in developed and emerging economies are primary exporters, while pharmaceutical companies, food processors, and industrial chemical users globally act as key importers. Understanding the specific oxygen function and any derivatives is critical for accurate classification, as these chemicals often dictate the properties and applications of end products, impacting trade flows for high-value industrial inputs.

Covers
  • Ascorbic acid derivatives
  • Gluconic acid derivatives
  • Tartaric acid derivatives
  • Malic acid derivatives
  • Salicylic acid acid derivatives
  • Citric acid derivatives
  • Lactic acid derivatives
Examples
  • Bayer (aspirin precursors)
  • BASF (chemical intermediates)
  • DSM (vitamin C derivatives)
  • Cargill (food acid derivatives)

Codes often confused with 2918.99

Common mistake. This code can be confused with 291819 (carboxylic acids with alcohol function) or 291829 (carboxylic acids with phenol function) if the specific nature of the additional oxygen function is not precisely identified.

2918.19Acids; carboxylic acids, (with alcohol function but without other oxygen function), other than lactic, tartaric, citric, and gluconic acids and their salts and esters2918.29Acids; carboxylic acids, (with phenol function but without other oxygen function), their anhydrides, halides, peroxides, peroxyacids and their derivatives, n.e.c. in item no. 2918.2

Top exporters and importers of HS code 291899, 2025

In 2025, the largest exporter of HS code 291899 in UN Comtrade data was China, with 43% of world exports; the largest importer in UN Comtrade data was the United States, with 22% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 China $669M
  2. 2 India $279M
  3. 3 Germany $139M

World total: $1.6B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $426M
  2. 2 Brazil $129M
  3. 3 Argentina $106M

World total: $1.9B Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM codes for 2918.99 14

Brazil splits HS 2918.99 into 14 NCM codes, Mercosur's 8-digit tariff lines.

  1. 2918.99.1 Phenoxyacetic acid, its salts and esters; derivatives of these productsÁcido fenoxiacético, seus sais e seus ésteres; derivados destes produtos Group
  2. 2918.99.11 Phenoxyacetic acid, its salts and estersÁcido fenoxiacético, seus sais e seus ésteres
  3. 2918.99.12 2,4-D, its salts and estersÁcido 2,4-diclorofenoxiacético (2,4-D), seus sais e seus ésteres
  4. 2918.99.19 Other phenoxyacetic acid derivativesOutros
  5. 2918.99.2 Phenoxybutanoic acids, their salts and esters; derivatives of these productsÁcidos fenoxibutanoicos, seus sais e seus ésteres; derivados destes produtos Group
  6. 2918.99.21 Dichlorophenoxybutanoic acids, salts and estersÁcidos diclorofenoxibutanoicos, seus sais e seus ésteres
  7. 2918.99.29 Other phenoxybutanoic acids and derivativesOutros
  8. 2918.99.30 Acifluorfen-sodiumAcifluorfen sódico
  9. 2918.99.40 NaproxenNaproxeno
  10. 2918.99.50 3-(2-Chloro-4-trifluoromethylphenoxy)benzoic acidÁcido 3-(2-cloro-alfa, alfa, alfa-trifluor-p-toliloxi)benzoico
  11. 2918.99.60 Diclofop-methylDiclofop-metila
  12. 2918.99.9 OtherOutros Group
  13. 2918.99.91 FenofibrateFenofibrato
  14. 2918.99.92 Methylchlorophenoxyacetic acids, salts and estersÁcidos metilclorofenoxiacéticos, seus sais e seus ésteres
  15. 2918.99.93 Lactofen5-(2-Cloro-4-trifluorometilfenoxi)-2-nitrobenzoato de 1'-(carboetoxi)etila (lactofen)
  16. 2918.99.94 4-(4-Hydroxyphenoxy)-3,5-diiodophenylacetic acidÁcido 4-(4-hidroxifenoxi)-3,5-di-iodofenilacético
  17. 2918.99.99 Other carboxylic acids with extra oxygen functionOutros

All Brazil NCM codes in heading 29.18 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 2918.99

What is HS code 291899?

HS code 291899 is a 6-digit subheading in the Harmonized System that covers: 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). This HS code encompasses a broad range of complex carboxylic acids featuring additional oxygen functions (excluding alcohol, phenol, aldehyde, or ketone groups), along with their anhydrides, halides, peroxides, peroxyacids, and various halogenated, sulphonated, nitrated, or nitrosated derivatives. These compounds are crucial intermediates in the chemical industry, finding extensive use in pharmaceuticals, agrochemicals, food additives, and specialty polymers. Major chemical manufacturers in developed and emerging economies are primary exporters, while pharmaceutical companies, food processors, and industrial chemical users globally act as key importers. Understanding the specific oxygen function and any derivatives is critical for accurate classification, as these chemicals often dictate the properties and applications of end products, impacting trade flows for high-value industrial inputs.

What products fall under HS code 291899?

Ascorbic acid derivatives, gluconic acid derivatives, tartaric acid derivatives, malic acid derivatives, salicylic acid acid derivatives, citric acid derivatives, lactic acid derivatives

What are common misclassifications for HS code 291899?

This code can be confused with 291819 (carboxylic acids with alcohol function) or 291829 (carboxylic acids with phenol function) if the specific nature of the additional oxygen function is not precisely identified.

Which countries are the top exporters of goods under HS code 291899?

In 2025, the top exporters of HS code 291899 in UN Comtrade data were China ($669M, 43% of world exports), India ($279M) and Germany ($139M). World exports came to about $1.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of goods under HS code 291899?

In 2025, the top importers of HS code 291899 in UN Comtrade data were the United States ($426M, 22% of world imports), Brazil ($129M) and Argentina ($106M). World imports came to about $1.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

How is HS code 291899 structured?

HS code 291899 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (18) identify the heading, and digits 5-6 (99) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 291899?

Brazil splits HS code 291899 into 14 NCM codes: 2918.99.11 (Phenoxyacetic acid, its salts and esters), 2918.99.12 (2,4-D, its salts and esters), 2918.99.19 (Other phenoxyacetic acid derivatives), 2918.99.21 (Dichlorophenoxybutanoic acids, salts and esters), 2918.99.29 (Other phenoxybutanoic acids and derivatives), 2918.99.30 (Acifluorfen-sodium), 2918.99.40 (Naproxen), 2918.99.50 (3-(2-Chloro-4-trifluoromethylphenoxy)benzoic acid), and more listed on this page. The first 6 digits of each match the HS code.