HS Code 29.21 – Amine-function compounds

HS code 2921 is a 4-digit heading in the Harmonized System that covers: Amine-function compounds. Heading 2921 encompasses 'Amine-function compounds,' a critical category within Section VI of the Harmonized System, specifically Chapter 29, which deals with organic chemicals. This heading broadly covers organic compounds characterized by the presence of at least one amino group (-NH2, -NH-, or -N-). It includes primary, secondary, and tertiary amines, whether acyclic, alicyclic, or aromatic, and their salts. The scope is defined by the absence of other specific oxygen-containing functional groups that would classify them under 2922, or if they are not quaternary ammonium salts (2923), amides (2924), imides/imines (2925), or heterocyclic compounds (2933, 2934, 2935). This classification is crucial for trade compliance as it differentiates basic amine building blocks from more complex derivatives. For importers and exporters, correctly identifying the 'amine-function' as the principal characteristic is paramount to avoid misclassification, which can lead to tariff discrepancies, customs delays, and penalties. These compounds are fundamental intermediates in various industries, including pharmaceuticals, agrochemicals, dyes, polymers (e.g., nylon precursors like hexamethylenediamine), and specialized solvents. Their historical significance lies in their role as foundational organic synthesis reagents, enabling the creation of countless modern materials and medicines. Understanding this heading's boundaries within Chapter 29 ensures that these essential chemical raw materials are classified accurately, facilitating smooth international trade in the chemical sector.

Aniline, Methylamine, Ethylenediamine, Hexamethylenediamine, Triethylamine, Diethylamine, n-Butylamine, Isopropylamine, Cyclohexylamine, Benzylamine, Ethanolamines (mono-, di-, tri-), Morpholine, Piperidine, Diethylenetriamine, Triethylenetetramine, Putrescine, Cadaverine, Phenethylamine, tert-Butylamine, Isopentylamine, Dimethylamine, Trimethylamine, N,N-Diisopropylethylamine

Traders often misclassify amine-function compounds, particularly when other functional groups are present. A common error is classifying compounds under 2921 when they possess an oxygen function, which would correctly place them under 2922 (Oxygen-function amino-compounds), for example, ethanolamines (which contain both amine and hydroxyl groups). Another frequent mistake occurs with heterocyclic compounds containing nitrogen (e.g., pyridine, pyrrole), which should be classified under 2933, not 2921, despite having amine-like nitrogen atoms. Additionally, mixtures or preparations containing amine-function compounds, if not chemically defined single substances, might be erroneously classified here instead of under Chapter 38 (Miscellaneous chemical products).

In 2025, the top exporters of HS code 2921 in UN Comtrade data were China ($2.5B, 25% of world exports), India ($1.1B) and the United States ($1.1B). World exports came to about $10.1B, 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.

In 2025, the top importers of HS code 2921 in UN Comtrade data were Germany ($1.3B, 13% of world imports), India ($961M) and the United States ($948M). World imports came to about $9.9B, 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.

HS code 2921 is a 4-digit heading under Chapter 29 of the Harmonized System. The first 2 digits (29) identify the chapter, and digits 3-4 (21) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.