HS code · 6-digit subheading
HS Code 2903.73 – Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens; dichlorofluoroethanes (HCFC-141, 141b)
HS code 2903.73 is the 6-digit subheading for halogenated derivatives of acyclic hydrocarbons containing two or more different halogens, dichlorofluoroethanes (HCFC-141, 141b). It is used for dichlorofluoroethane, HCFC-141b, R-141b, solkane 141b and blowing agent 141b.
What HS 2903.73 covers
This HS code specifically identifies dichlorofluoroethanes, with a primary focus on HCFC-141b. HCFC-141b was extensively used as a blowing agent in the production of rigid polyurethane foams, a precision cleaning solvent in various industries, and a component in certain aerosol propellants. Its significant ozone-depleting potential led to its accelerated phase-out under the Montreal Protocol, with production and consumption largely ceased in developed countries and rapidly phasing out in developing nations. Consequently, international trade in HCFC-141b is now highly restricted, primarily limited to very specific, authorized critical uses or for destruction and recycling purposes. Importers and exporters are typically specialized chemical companies or those involved in managing legacy equipment and waste streams.
- Covers
- Dichlorofluoroethane
- HCFC-141b
- R-141b
- Solkane 141b
- Blowing agent 141b
- Cleaning solvent 141b
- Examples
- Honeywell Genetron 141b
- Arkema Forane 141b
- Chemours Dichlorofluoroethane
- Daikin R-141b
Codes often confused with 2903.73
Common mistake. Can be confused with other HCFCs, especially HCFC-142b (2903.74), due to similar chemical structures and applications, requiring careful distinction by specific isomer.
Top exporters and importers of HS code 290373, 2025
In 2025, the largest exporter of HS code 290373 in UN Comtrade data was China, with 97% of world exports; the largest importer in UN Comtrade data was South Korea, with 41% 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 China $15M 97% of world exports
- 2 Singapore $193K 1.3% of world exports
- 3 Canada $182K 1.2% of world exports
World total: $15M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $6.7M 41% of world imports
- 2 United Arab Emirates* ~$3.1M 19% of world imports · partner records ↗
- 3 Brazil $2.1M 13% of world imports
World total: $16M 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 code for 2903.73
Brazil does not split HS 2903.73: its NCM code is 2903.73.00.
All Brazil NCM codes in heading 29.03 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2903.73
What is HS code 290373?
HS code 290373 is a 6-digit subheading in the Harmonized System that covers: Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens; dichlorofluoroethanes (HCFC-141, 141b). This HS code specifically identifies dichlorofluoroethanes, with a primary focus on HCFC-141b. HCFC-141b was extensively used as a blowing agent in the production of rigid polyurethane foams, a precision cleaning solvent in various industries, and a component in certain aerosol propellants. Its significant ozone-depleting potential led to its accelerated phase-out under the Montreal Protocol, with production and consumption largely ceased in developed countries and rapidly phasing out in developing nations. Consequently, international trade in HCFC-141b is now highly restricted, primarily limited to very specific, authorized critical uses or for destruction and recycling purposes. Importers and exporters are typically specialized chemical companies or those involved in managing legacy equipment and waste streams.
What products fall under HS code 290373?
Dichlorofluoroethane, HCFC-141b, R-141b, Solkane 141b, blowing agent 141b, cleaning solvent 141b
What are common misclassifications for HS code 290373?
Can be confused with other HCFCs, especially HCFC-142b (2903.74), due to similar chemical structures and applications, requiring careful distinction by specific isomer.
Which countries are the top exporters of goods under HS code 290373?
In 2025, the top exporters of HS code 290373 in UN Comtrade data were China ($15M, 97% of world exports), Singapore ($193K) and Canada ($182K). World exports came to about $15M, 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 290373?
In 2025, the top importers of HS code 290373 in UN Comtrade data were South Korea ($6.7M, 41% of world imports), the United Arab Emirates (about $3.1M) and Brazil ($2.1M). World imports came to about $16M, 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 290373 structured?
HS code 290373 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (03) identify the heading, and digits 5-6 (73) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 290373?
In Brazil, HS code 290373 is NCM 2903.73.00. The last two digits are 00 because Brazil does not split this HS code further.