Product classification

HS code for HFC-365mfc: 2903.48

Saturated fluorinated derivatives of acyclic hydrocarbons, 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee).

Classification of HFC-365mfc under HS 2903.48

HFC-365mfc, chemically known as 1,1,1,3,3-pentafluorobutane, is classified under HS code 2903.48. This classification is determined by the General Rules for the Interpretation (GRI) of the Harmonized System, specifically focusing on Chapter 29, which covers organic chemicals. Within this chapter, heading 2903 is dedicated to halogenated derivatives of hydrocarbons. HFC-365mfc is a saturated fluorinated derivative of an acyclic hydrocarbon. The 2022 updates to the Harmonized System nomenclature specifically isolated certain hydrofluorocarbons (HFCs) into distinct subheadings to better monitor their trade under environmental protocols like the Kigali Amendment to the Montreal Protocol. Since HFC-365mfc is a saturated acyclic hydrocarbon where fluorine is the only halogen present, and it is specifically named in the subheading 2903.48 alongside 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee), this code is the only legally correct classification for the pure chemical.

Covers
  • 1,1,1,3,3-pentafluorobutane (HFC-365mfc)
  • 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee)
  • Pure HFC-365mfc used as a blowing agent
  • Pure HFC-365mfc used as a solvent in precision cleaning
Also under 2903.48
  • 3M Novec 7300 (contains HFC-43-10mee)
  • Solvay Solkane 365mfc
  • Honeywell Enovate 365mfc
  • DuPont Vertrel XF (contains HFC-43-10mee)

Codes often confused with 2903.48

Common mistake. HFC-365mfc is frequently misclassified under 2903.49, which is the residual category for other saturated fluorinated derivatives. However, because 2903.48 specifically names HFC-365mfc, the specific heading takes precedence over the general one. Another common error is using 3824.78, which applies to mixtures containing perfluorocarbons (PFCs) or hydrofluorocarbons (HFCs). If the product is a pure chemical, it must remain in Chapter 29; Chapter 38 is reserved for chemical preparations and mixtures.

2903.49Saturated fluorinated derivatives of acyclic hydrocarbons; n.e.c. in item no 2903.4

Top exporters and importers of HS 290348 (the code used for HFC-365mfc), 2025

In 2025, the largest exporter of HS 290348 (the code used for HFC-365mfc) in UN Comtrade data was Japan, with 77% of world exports; the largest importer in UN Comtrade data was the United States, with 65% of world imports. Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.

Figures cover everything classified under HS 290348, not only HFC-365mfc.

Top exporters 2025 · share of world exports

  1. 1 Japan $11M
  2. 2 United States $1.8M
  3. 3 Netherlands $1.5M

World total: $14M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $9.0M
  2. 2 Singapore $1.3M
  3. 3 Malaysia $780K

Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.

World total: $14M 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 HFC-365mfc

Brazil classifies HFC-365mfc under NCM 2903.48.00: HS 2903.48 with 00 added.

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about HFC-365mfc

What is the HS code for HFC-365mfc?

The HS code for HFC-365mfc is 290348 (Saturated fluorinated derivatives of acyclic hydrocarbons; 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee)). The specific HS code for HFC-365mfc (1,1,1,3,3-pentafluorobutane) is 2903.48.

How do I classify HFC-365mfc for customs?

HFC-365mfc is classified under HS code 290348 — Saturated fluorinated derivatives of acyclic hydrocarbons; 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee). This is a 6-digit subheading level code.

Does this code apply to HFC-365mfc blended with HFC-227ea?

No. Once HFC-365mfc is blended with another HFC, such as HFC-227ea for use in foam blowing, it is classified as a mixture under HS code 3824.78.

Which countries are the top exporters of HFC-365mfc (HS 290348)?

In 2025, the top exporters of HS 290348 (the code used for HFC-365mfc) in UN Comtrade data were Japan ($11M, 77% of world exports), the United States ($1.8M) and the Netherlands ($1.5M). World exports came to about $14M, 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 HFC-365mfc (HS 290348)?

In 2025, the top importers of HS 290348 (the code used for HFC-365mfc) in UN Comtrade data were the United States ($9.0M, 65% of world imports), Singapore ($1.3M) and Malaysia ($780K). World imports came to about $14M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.

Is the HS code for HFC-365mfc the same in all countries?

The base HS code 290348 for HFC-365mfc is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for HFC-365mfc in Brazil?

In Brazil, HFC-365mfc (HS 290348) is classified under NCM 2903.48.00.