HS Code 29.03 – Halogenated derivatives of hydrocarbons

HS code 2903 is a 4-digit heading in the Harmonized System that covers: Halogenated derivatives of hydrocarbons. Heading 2903 covers halogenated derivatives of hydrocarbons, which are organic compounds where one or more hydrogen atoms in a hydrocarbon structure (acyclic or cyclic) have been replaced by halogen atoms (fluorine, chlorine, bromine, or iodine). This broad category includes a wide range of chemicals, from simple chlorinated methanes and ethanes to more complex fluorocarbons and brominated compounds. These derivatives serve diverse industrial purposes, including refrigerants, solvents, chemical intermediates, fire retardants, and precursors for plastics and polymers. The scope encompasses pure, individual halogenated hydrocarbons, but generally excludes mixtures of these compounds designed for specific applications (e.g., refrigerant blends), which often fall under Chapter 38. This classification is particularly sensitive due to international environmental protocols such as the Montreal Protocol, which regulates the production and trade of ozone-depleting substances like CFCs and HCFCs, and the Kigali Amendment, which targets HFCs. Accurate classification is paramount for compliance with these regulations, import/export licensing, and tariff assessment. Historically, many compounds in this heading have undergone significant regulatory changes due to their environmental impact. This heading represents a key branch within Chapter 29, demonstrating how basic hydrocarbons are chemically modified to achieve new functionalities.

Chloroform, Carbon tetrachloride, Dichloromethane, Trichloroethylene, Perchloroethylene, 1,2-Dichloroethane, Vinyl chloride monomer (VCM), Chlorobenzene, Bromomethane, Chlorofluorocarbons (CFCs) (e.g., CFC-11, CFC-12), Hydrochlorofluorocarbons (HCFCs) (e.g., HCFC-22, HCFC-141b), Hydrofluorocarbons (HFCs) (e.g., HFC-134a, HFC-125), Methyl chloride, Ethyl chloride, Allyl chloride, Benzyl chloride, Iodomethane, Hexachlorobutadiene, Tetrachloroethylene, 1,1,1-Trichloroethane.

A frequent misclassification involves distinguishing pure halogenated hydrocarbons from their prepared mixtures. For example, refrigerant gas mixtures, even if composed solely of substances from 2903, are typically classified under 3824 (Prepared binders for foundry moulds; chemical products and preparations of the chemical or allied industries) as specific chemical preparations. Similarly, products formulated as insecticides or herbicides, even if their active ingredient is a halogenated hydrocarbon, fall under 3808 (Insecticides, rodenticides, fungicides, herbicides, anti-sprouting products and plant-growth regulators, disinfectants and similar products, put up in forms or packings for retail sale or as preparations or articles). Another error can occur with vinyl chloride monomer (VCM); if it has undergone any polymerization, even partially, it might drift towards 3904 (Polymers of vinyl chloride or of other halogenated olefins, in primary forms).

In 2025, the top exporters of HS code 2903 in UN Comtrade data were China ($3.0B, 28% of world exports), the United States ($2.2B) and the Netherlands ($883M). World exports came to about $10.7B, 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 2903 in UN Comtrade data were India ($822M, 7.5% of world imports), the Netherlands ($808M) and Mexico ($789M). World imports came to about $11.0B, 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.

HS code 2903 is a 4-digit heading under Chapter 29 of the Harmonized System. The first 2 digits (29) identify the chapter, and digits 3-4 (03) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.