HS code · 6-digit subheading

HS Code 2925.29 – Imines and their derivatives; salts thereof; other than chlordimeform (ISO)

HS code 2925.29 is the 6-digit subheading for imines and their derivatives, salts thereof, other than chlordimeform (ISO). It is used for schiff bases, aldimines, ketimines, various pharmaceutical intermediates and dye precursors.

What HS 2925.29 covers

This category encompasses a wide array of imines and their derivatives, excluding the specific insecticide chlordimeform. These compounds are crucial intermediates in organic synthesis, finding extensive applications across various industries. They are utilized in the production of pharmaceuticals, agrochemicals, dyes, and specialty polymers. Importers and exporters are typically chemical manufacturers, research and development firms, and companies specializing in fine chemicals. Key aspects of their trade include their reactivity, their role as versatile building blocks for more complex molecules, and the necessity for high purity to meet the demanding specifications of their diverse industrial applications. Regulatory compliance for chemical safety is also a significant factor.

Covers
  • Schiff bases
  • Aldimines
  • Ketimines
  • Various pharmaceutical intermediates
  • Dye precursors
  • Polymer cross-linking agents
Examples
  • Certain anti-cancer drug intermediates
  • components in polymer synthesis (e.g., for polyurethanes)
  • specific dye formulations
  • corrosion inhibitors

Codes often confused with 2925.29

Common mistake. These imines are often confused with other nitrogen-function compounds, particularly amines (2921) or amides (2924), or even heterocyclic compounds (2933, 2934) if the imine is part of a ring system.

29.21Amine-function compounds29.24Carboxyamide-function compounds; amide-function compounds of carbonic acid29.33Heterocyclic compounds with nitrogen hetero-atom(s) only29.34Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds

Top exporters and importers of HS code 292529, 2025

In 2025, the largest exporter of HS code 292529 in UN Comtrade data was China, with 37% of world exports; the largest importer in UN Comtrade data was the United States, with 14% 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 $663M
  2. 2 Germany $223M
  3. 3 France $207M

World total: $1.8B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $280M
  2. 2 China $221M
  3. 3 Brazil $185M

World total: $2.0B 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 2925.29 10

Brazil splits HS 2925.29 into 10 NCM codes, Mercosur's 8-digit tariff lines.

  1. 2925.29.1 Arginine and its saltsArginina e seus sais Group
  2. 2925.29.11 L-Arginine aspartateAspartato de L-arginina
  3. 2925.29.19 Arginine and its other saltsOutros
  4. 2925.29.2 Guanidine and its derivatives; salts thereofGuanidina e seus derivados; sais destes produtos Group
  5. 2925.29.21 GuanidineGuanidina
  6. 2925.29.22 N,N'-DiphenylguanidineN,N'-Difenilguanidina
  7. 2925.29.23 Chlorhexidine and its saltsClorexidina e seus sais
  8. 2925.29.29 Other guanidine derivatives and saltsOutros
  9. 2925.29.30 AmitrazAmitraz
  10. 2925.29.40 Pentamidine isetionateIsetionato de pentamidina
  11. 2925.29.50 Hydroxycitronellal methyl anthranilate Schiff baseN-(3,7-Dimetil-7-hidroxioctilideno)antranilato de metila
  12. 2925.29.90 Other imines and their derivatives; saltsOutros

All Brazil NCM codes in heading 29.25 →

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

Questions about HS 2925.29

What is HS code 292529?

HS code 292529 is a 6-digit subheading in the Harmonized System that covers: Imines and their derivatives; salts thereof; other than chlordimeform (ISO). This category encompasses a wide array of imines and their derivatives, excluding the specific insecticide chlordimeform. These compounds are crucial intermediates in organic synthesis, finding extensive applications across various industries. They are utilized in the production of pharmaceuticals, agrochemicals, dyes, and specialty polymers. Importers and exporters are typically chemical manufacturers, research and development firms, and companies specializing in fine chemicals. Key aspects of their trade include their reactivity, their role as versatile building blocks for more complex molecules, and the necessity for high purity to meet the demanding specifications of their diverse industrial applications. Regulatory compliance for chemical safety is also a significant factor.

What products fall under HS code 292529?

Schiff bases, aldimines, ketimines, various pharmaceutical intermediates, dye precursors, polymer cross-linking agents

What are common misclassifications for HS code 292529?

These imines are often confused with other nitrogen-function compounds, particularly amines (2921) or amides (2924), or even heterocyclic compounds (2933, 2934) if the imine is part of a ring system.

Which countries are the top exporters of goods under HS code 292529?

In 2025, the top exporters of HS code 292529 in UN Comtrade data were China ($663M, 37% of world exports), Germany ($223M) and France ($207M). World exports came to about $1.8B, 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 292529?

In 2025, the top importers of HS code 292529 in UN Comtrade data were the United States ($280M, 14% of world imports), China ($221M) and Brazil ($185M). World imports came to about $2.0B, 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 292529 structured?

HS code 292529 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (25) identify the heading, and digits 5-6 (29) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 292529?

Brazil splits HS code 292529 into 10 NCM codes: 2925.29.11 (L-Arginine aspartate), 2925.29.19 (Arginine and its other salts), 2925.29.21 (Guanidine), 2925.29.22 (N,N'-Diphenylguanidine), 2925.29.23 (Chlorhexidine and its salts), 2925.29.29 (Other guanidine derivatives and salts), 2925.29.30 (Amitraz), 2925.29.40 (Pentamidine isetionate), and more listed on this page. The first 6 digits of each match the HS code.