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HSChapter 38
U.S. imports of refrigerant mixtures containing 30% or more hfc-134a (1,1,1,2-tetrafluoroethane), excluding hfos (HS 382764) totaled $10K in April 2026, traded with 2 countries.
Refrigerant Mixtures Containing 30% or More HFC-134a (1,1,1,2-Tetrafluoroethane), Excluding HFOs imports of $10K in April 2026 ran 31% below the year-to-date monthly average of $15K.
Last updated: April 2026 dataHFC-134a-dominant blends at 30% or more by mass — without HFO content — are classified here, covering formulations used in automotive air conditioning, medium-temperature refrigeration, and certain industrial cooling systems. India and China are the leading US suppliers, together accounting for the bulk of import volume, with Mexico and Taiwan also contributing meaningfully to supply. The explicit HFO exclusion mirrors the structure of adjacent subheadings and is critical for distinguishing these blends from newer low-GWP alternatives that incorporate HFO-1234yf or similar compounds. EPA AIM Act allowance compliance is mandatory, and Chinese-origin goods are subject to Section 301 measures.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Several newer refrigerant blends marketed as drop-in replacements for R-134a incorporate small percentages of HFOs to reduce global warming potential. Even if HFC-134a remains the dominant component at 30% or more, the presence of any HFO content disqualifies the blend from this subheading and redirects it to the HFO-containing mixture subheadings. Importers must scrutinize the full composition to avoid misclassification.
India has developed substantial fluorochemical manufacturing capacity and has become a major exporter of HFC blends to the US market. Because India is not a US free-trade-agreement partner, standard MFN duty rates apply, and importers should monitor any trade-remedy proceedings or AIM Act enforcement actions that could affect sourcing economics from that origin.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | -- | $70K | +$70K |
| MEXICO | $10K | -- | -$10K |
| UNITED KINGDOM | -- | -- | -- |
| MICRONESIA | -- | -- | -- |
| TAIWAN | -- | -- | -- |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % |
|---|---|---|---|
| 3827640000 | MIX CONT GT=30% HFC-134A BUT NOT CONT HFOS, NESOI | $10K | -- |
MIX CONT GT=30% HFC-134A BUT NOT CONT HFOS, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3827640000 | MIX CONT GT=30% HFC-134A BUT NOT CONT HFOS, NESOI | $70K |
MIX CONT GT=30% HFC-134A BUT NOT CONT HFOS, NESOI
2.0K kg
PRODUCTS AND RESIDUALS OF CHEMICAL INDUSTRY, NESOI
HS 382499
DIAGNOSTIC OR LABORATORY REAGENTS INCL KITS, NESOI
HS 382219
CHEM ELEM DOPED, USED IN ELECTRON, DISCS WAFERS ET
HS 381800
SUPPORTED CATALYSTS W PREC METAL/PREC MTL COMPND
HS 381512
SUPPORTED CATALYSTS, NESOI
HS 381519
ADDITIVE FOR LUB OIL CONT PETRO/BITUMINOUS MINOIL
HS 381121
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SEATTLE, WA | -- | $42K | +$42K |
| PORT HURON, MI | -- | $19K | +$19K |
| LAREDO, TX | $10K | -- | -$10K |