HS code · 6-digit subheading
HS Code 2903.59 – Unsaturated fluorinated derivatives of acyclic hydrocarbons; n.e.c. in item no. 2903.5
HS code 2903.59 is the 6-digit subheading for unsaturated fluorinated derivatives of acyclic hydrocarbons, n.e.c. in item no. 2903.5. It is used for HFO-1234yf, HFO-1234ze, R-1233zd, 2,3,3,3-Tetrafluoropropene and 1,3,3,3-Tetrafluoropropene.
What HS 2903.59 covers
This HS code covers a diverse group of unsaturated fluorinated derivatives of acyclic hydrocarbons not specifically classified elsewhere within heading 2903.5. These are specialized organic chemicals, often used as refrigerants, blowing agents, propellants, or intermediates in the production of polymers and pharmaceuticals. Due to their unique properties, such as low toxicity, non-flammability, and specific boiling points, they are critical in niche industrial applications. International trade involves chemical manufacturers supplying these compounds to high-tech industries, particularly in developed economies. Key considerations include their specific chemical structure, environmental impact (e.g., GWP, ODP), and regulatory status, as many fluorinated compounds are subject to strict controls due to climate change concerns.
- Covers
- HFO-1234yf
- HFO-1234ze
- R-1233zd
- 2,3,3,3-Tetrafluoropropene
- 1,3,3,3-Tetrafluoropropene
- Pentafluoropropene
- Examples
- Opteon YF (Chemours)
- Solstice ze (Honeywell)
- Forane 1233zd (Arkema)
Codes often confused with 2903.59
Common mistake. This "n.e.c." (not elsewhere specified) code is for specific unsaturated fluorinated derivatives. It's crucial to distinguish it from saturated fluorinated derivatives (2903.4X) or other halogenated derivatives (2903.1X, 2903.2X, 2903.3X) and ensure the compound is indeed unsaturated and fluorinated.
Top exporters and importers of HS code 290359, 2025
In 2025, the largest exporter of HS code 290359 in UN Comtrade data was Japan, with 29% of world exports; the largest importer in UN Comtrade data was China, with 17% 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 Japan $98M 29% of world exports
- 2 China $67M 19% of world exports
- 3 Russia* ~$54M 16% of world exports · partner records ↗
World total: $345M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $67M 17% of world imports
- 2 South Korea $60M 16% of world imports
- 3 Japan $52M 14% of world imports
World total: $385M 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 codes for 2903.59 2
Brazil splits HS 2903.59 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 2903.59.10 Perfluoroisobutene (PFIB)1,1,3,3,3-Pentafluoro-2-(trifluorometil)prop-1-eno
- 2903.59.90 Other unsaturated fluorinated acyclic derivativesOutros
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 2903.59
What is HS code 290359?
HS code 290359 is a 6-digit subheading in the Harmonized System that covers: Unsaturated fluorinated derivatives of acyclic hydrocarbons; n.e.c. in item no. 2903.5. This HS code covers a diverse group of unsaturated fluorinated derivatives of acyclic hydrocarbons not specifically classified elsewhere within heading 2903.5. These are specialized organic chemicals, often used as refrigerants, blowing agents, propellants, or intermediates in the production of polymers and pharmaceuticals. Due to their unique properties, such as low toxicity, non-flammability, and specific boiling points, they are critical in niche industrial applications. International trade involves chemical manufacturers supplying these compounds to high-tech industries, particularly in developed economies. Key considerations include their specific chemical structure, environmental impact (e.g., GWP, ODP), and regulatory status, as many fluorinated compounds are subject to strict controls due to climate change concerns.
What products fall under HS code 290359?
HFO-1234yf, HFO-1234ze, R-1233zd, 2,3,3,3-Tetrafluoropropene, 1,3,3,3-Tetrafluoropropene, Pentafluoropropene
What are common misclassifications for HS code 290359?
This "n.e.c." (not elsewhere specified) code is for specific unsaturated fluorinated derivatives. It's crucial to distinguish it from saturated fluorinated derivatives (2903.4X) or other halogenated derivatives (2903.1X, 2903.2X, 2903.3X) and ensure the compound is indeed unsaturated and fluorinated.
Which countries are the top exporters of goods under HS code 290359?
In 2025, the top exporters of HS code 290359 in UN Comtrade data were Japan ($98M, 29% of world exports), China ($67M) and Russia (about $54M). World exports came to about $345M, 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 290359?
In 2025, the top importers of HS code 290359 in UN Comtrade data were China ($67M, 17% of world imports), South Korea ($60M) and Japan ($52M). World imports came to about $385M, 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 290359 structured?
HS code 290359 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 (59) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 290359?
Brazil splits HS code 290359 into 2 NCM codes: 2903.59.10 (Perfluoroisobutene (PFIB)), 2903.59.90 (Other unsaturated fluorinated acyclic derivatives). The first 6 digits of each match the HS code.