Official data Source: US Census Bureau international trade data
Track this product1,1,1,3,3-pentafluorobutane (hfc-365mfc) and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (hfc-4310mee)
In short
- The US imported $10.4M of this product over the 12 months to August 2026, up 0.3% on the year before.
- 2 Federal Register notices named this product's tariff codes in the last 12 months.
- US exports were $1.3M over the last 12 months; the largest market is Mexico, with 66.5%.
US imports, Aug 2026
$0
↓ −100% vs Aug 2025
Last 12 months
$10.4M
↑ +0.3% vs the 12 months before
Average duty paid
n/a
None vs Aug 2025
Top supplier
None
US imports by month
The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted.
Show the numbers
| Month | US imports |
|---|---|
| August 2025 | $772K |
| September 2025 | $1.2M |
| October 2025 | $0 |
| November 2025 | $608K |
| December 2025 | $0 |
| January 2026 | $1.6M |
| February 2026 | $378K |
| March 2026 | $1.4M |
| April 2026 | $1.6M |
| May 2026 | $696K |
| June 2026 | $1.6M |
| July 2026 | $1.4M |
| August 2026 | $0 |
What changed
- The US recorded no imports of this product in August 2026.
- Over the 12 months to August 2026 they totalled $10.4M, up 0.3% on the 12 months before.
- Biggest moves in market share since July 2026: Japan down from 100.0% to 0.0%.
US trade by year
US imports were $10.4M in the 12 months to Aug 2026, down 30% on the 12 months to Aug 2023. US exports were $1.3M, up 164%. This code began with the HS 2022 revision in January 2022, taking goods from 2903.39, so its history starts there. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
Show the numbers
| Period | US imports |
|---|---|
| 12 months to Aug 2023 | $14.7M |
| 12 months to Aug 2024 | $11.1M |
| 12 months to Aug 2025 | $10.4M |
| 12 months to Aug 2026 | $10.4M |
- Japan
- All countries
Show the numbers
| Period | Japan |
|---|---|
| 12 months to Aug 2023 | 85.9% |
| 12 months to Aug 2024 | 100.0% |
| 12 months to Aug 2025 | 100.0% |
| 12 months to Aug 2026 | 100.0% |
Show the numbers
| Period | Japan | All countries |
|---|---|---|
| 12 months to Aug 2023 | 3.7% | 3.7% |
| 12 months to Aug 2024 | 3.7% | 3.7% |
| 12 months to Aug 2025 | 6.9% | 6.9% |
| 12 months to Aug 2026 | 13.4% | 13.4% |
| Period | US imports | Duty paid | US exports |
|---|---|---|---|
| 12 months to Aug 2026 | $10.4M+0.3% | 13.4%+6.5 pts | $1.3M+9.8% |
| 12 months to Aug 2025 | $10.4M−6.8% | 6.9%+3.2 pts | $1.2M+255% |
| 12 months to Aug 2024 | $11.1M−25% | 3.7%0.0 pts | $345K−32% |
| 12 months to Aug 2023 | $14.7M | 3.7% | $511K |
Who supplies the US
August 2026. Small figures under each value are the change from August 2025.
| Country | US imports | Share | Average price | Duty paid | Last 13 months |
|---|---|---|---|---|---|
| All countries | $0 | n/a | n/a | n/a |
Tariff actions touching this product
When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.
- July 2025 · Duty paid: Japan 3.7% → 13.7%, all countries 3.7% → 13.7%.
Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. Search the Federal Register for 2903.48
- Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation
- Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal Trade
Where it enters the US
Main ports of entry over the 12 months to August 2026: US imports and share.
Where US exports go
US exports were $0 in August 2026, down 100% from August 2025, and $1.3M over the last 12 months, up 9.8% on the 12 months before. Fastest-growing market with 3% or more of US exports: Singapore, up 4485%.
| Market | Last 12 months | Share | vs 12 months before |
|---|---|---|---|
| Mexico | $895K | 66.5% | −11% |
| Singapore | $329K | 24.5% | +4485% |
| Turkey | $47K | 3.5% | −49% |
| Brazil | $26K | 1.9% | −36% |
| United Kingdom | $13K | 0.9% | +19% |
| Korea, South | $12K | 0.9% | new |
| Switzerland | $12K | 0.9% | +11% |
| Dominican Republic | $7K | 0.6% | −64% |
| Canada | $4K | 0.3% | +9.7% |
| All countries | $1.3M | 100.0% | +9.8% |
Markets abroad
Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 25 have reported 2025 so far.
| Market | Imports | vs year before | From the US | US share |
|---|---|---|---|---|
| Singapore | $1.3Min 2025 | −71% | $7K | 0.6% |
| Malaysia | $780Kin 2025 | −14% | $0 | 0.0% |
| Belgium | $480Kin 2024 | −75% | $0 | 0.0% |
| Netherlands | $469Kin 2025 | −2.4% | $0 | 0.0% |
| Chile | $462Kin 2025 | +167% | $0 | 0.0% |
| China | $324Kin 2025 | −20% | $0 | 0.0% |
| United Kingdom | $320Kin 2025 | +68% | $0 | 0.0% |
| France | $218Kin 2025 | +645% | $0 | 0.0% |
The biggest market outside the US is Singapore, which imported $1.3M of this product in 2025, 0.6% of that from the US.
Related products
Other products under heading 2903: halogenated derivatives of hydrocarbons. US trade over the 12 months to August 2026.
| Product | US imports | US exports |
|---|---|---|
| Vinyl chloride (chloroethylene)HS 2903.21 | $9K | $914.0M |
| 2,3,3,3-tetrafluoropropene (hfo-1234yf), 1,3,3,3-tetrafluoropropene (hfo-1234ze) and (z)-1,1,14,4,4-hexafluoro-2-butene (hfo-1336mzz)HS 2903.51 | $77.5M | $533.0M |
| 1,2-dichloroethane (ethylene dichloride)HS 2903.15 | $29K | $238.7M |
| Halogenated derivatives of aromatic hydrocarbons, not elsewhere specifiedHS 2903.99 | $81.6M | $145.3M |
| Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens, not elsewhere specifiedHS 2903.79 | $48.3M | $94.1M |
| 1,1,1,2-tetrafluoroethane (hfc-134a) and 1,1,2,2-tetrafluoroethane (hfc-134)HS 2903.45 | $60.7M | $73.1M |
| Unsaturated chlorinated derivatives of acyclic hydrocarbons, not elsewhere specifiedHS 2903.29 | $72.4M | $20.6M |
| Pentafluoroethane (hfc-125), 1,1,1-trifluoroethane (hfc-143a) and 1,1,2-trifluoroethane (hfc-143)HS 2903.44 | $40.8M | $27.3M |
About these figures
- Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
- US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
- Average price is customs value divided by quantity (kilograms), across all of the product's 10-digit lines.
- Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
- Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
- Tariff notices are from the Federal Register, matched to this product by the HTS numbers in their text.
- Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.