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Harmonized System
U.S. imports of trifluoromethane (hfc-23) (HS 290341) totaled $319K in July 2026, traded with 3 countries.
Importers of Trifluoromethane (HFC-23) paid $46K in duties in July 2026 — an effective duty rate of 14% on $319K in dutiable value, based on actual customs collections rather than the published tariff schedule. Trifluoromethane (HFC-23) imports of $319K in July 2026 ran 21% above the year-to-date monthly average of $263K.
Last updated: July 2026 dataHFC-23 carries one of the highest global warming potentials among hydrofluorocarbons, making it a focal point of international climate policy under the Kigali Amendment to the Montreal Protocol. Classified under 10-digit line 2903411000, US imports originate predominantly from China, with Japan and Taiwan as secondary sources. Importers should be aware that HFC-23 is subject to Section 301 tariffs on Chinese-origin goods, and EPA AIM Act regulations governing HFC production and consumption may affect import allowances and reporting requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
7 shipments/mo
The AIM Act authorizes EPA to phase down HFC production and consumption in the US and to regulate their use. Importers of HFC-23 may be subject to EPA allowance requirements, and shipments may require prior EPA authorization. Compliance obligations are evolving, so importers should consult current EPA guidance before contracting supply.
Beyond standard TSCA certification, importers should be prepared to provide documentation of the compound's intended use, as EPA may require it to verify allowance eligibility. Some downstream customers also require environmental compliance certifications given HFC-23's climate impact profile.
HSChapter 29
Subheading 23 of 41 in heading 2903
Subheading 290341 · $319K of $60.3M
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ImportsExports
Imports
$319KYoY · Pro
Exports
$154KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2903411000 | Trifluoromethane (Hfc-23) | $319K | 14.47% | 100.00% | $46K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2903411000 | Trifluoromethane (Hfc-23) | $154K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
China and Japan together supply 100% of it.
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destination
entry
rate provision · imports
the effective duty rate is 14.47%.