HS code · 6-digit subheading
HS Code 2903.74 – Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens; chlorodifluoroethanes HCFC-142, 142b)
HS code 2903.74 is the 6-digit subheading for halogenated derivatives of acyclic hydrocarbons containing two or more different halogens, chlorodifluoroethanes HCFC-142, 142b). It is used for chlorodifluoroethane, HCFC-142b, R-142b, blowing agent 142b and feedstock 142b.
What HS 2903.74 covers
This HS code covers chlorodifluoroethanes, specifically referring to HCFC-142b. HCFC-142b has been employed as a refrigerant (R-142b), a blowing agent for extruded polystyrene foam, and a crucial feedstock for the production of vinylidene fluoride (VDF), which is a monomer used in high-performance fluoropolymers. Similar to other hydrochlorofluorocarbons, HCFC-142b is subject to phase-out under the Montreal Protocol due to its ozone-depleting potential. Its use as a refrigerant and blowing agent is largely restricted, with its primary remaining application being as a feedstock in chemical synthesis in some regions. Trade involves chemical manufacturers and specialized industrial users, particularly those in the fluoropolymer industry, navigating strict environmental regulations.
- Covers
- Chlorodifluoroethane
- HCFC-142b
- R-142b
- Blowing agent 142b
- Feedstock 142b
- Genetron 142b
- Examples
- Honeywell Genetron 142b
- Arkema Forane 142b
- Chemours Chlorodifluoroethane
- Daikin R-142b
Codes often confused with 2903.74
Common mistake. Often confused with HCFC-141b (2903.73) due to similar names and applications, necessitating precise chemical identification to avoid misclassification.
Top exporters and importers of HS code 290374, 2025
In 2025, the largest exporter of HS code 290374 in UN Comtrade data was France, with 69% of world exports; the largest importer in UN Comtrade data was the United States, with 71% 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 France $38M 69% of world exports
- 2 China $16M 30% of world exports
- 3 India $563K 1.0% of world exports
World total: $55M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $34M 71% of world imports
- 2 India $9.6M 20% of world imports
- 3 Japan $3.0M 6.4% of world imports
World total: $47M 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 code for 2903.74
Brazil does not split HS 2903.74: its NCM code is 2903.74.00.
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 2903.74
What is HS code 290374?
HS code 290374 is a 6-digit subheading in the Harmonized System that covers: Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens; chlorodifluoroethanes HCFC-142, 142b). This HS code covers chlorodifluoroethanes, specifically referring to HCFC-142b. HCFC-142b has been employed as a refrigerant (R-142b), a blowing agent for extruded polystyrene foam, and a crucial feedstock for the production of vinylidene fluoride (VDF), which is a monomer used in high-performance fluoropolymers. Similar to other hydrochlorofluorocarbons, HCFC-142b is subject to phase-out under the Montreal Protocol due to its ozone-depleting potential. Its use as a refrigerant and blowing agent is largely restricted, with its primary remaining application being as a feedstock in chemical synthesis in some regions. Trade involves chemical manufacturers and specialized industrial users, particularly those in the fluoropolymer industry, navigating strict environmental regulations.
What products fall under HS code 290374?
Chlorodifluoroethane, HCFC-142b, R-142b, blowing agent 142b, feedstock 142b, Genetron 142b
What are common misclassifications for HS code 290374?
Often confused with HCFC-141b (2903.73) due to similar names and applications, necessitating precise chemical identification to avoid misclassification.
Which countries are the top exporters of goods under HS code 290374?
In 2025, the top exporters of HS code 290374 in UN Comtrade data were France ($38M, 69% of world exports), China ($16M) and India ($563K). World exports came to about $55M, 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 290374?
In 2025, the top importers of HS code 290374 in UN Comtrade data were the United States ($34M, 71% of world imports), India ($9.6M) and Japan ($3.0M). World imports came to about $47M, 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 290374 structured?
HS code 290374 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 (74) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 290374?
In Brazil, HS code 290374 is NCM 2903.74.00. The last two digits are 00 because Brazil does not split this HS code further.