Hexafluorobutadiene

CAS 685-63-2

1,3-Butadiene, 1,1,2,3,4,4-hexafluoro-

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$48M

Top sourceChina 36%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 290359 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 290359, which covers 16 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 36%ChinaDE 35%GermanyJP 21%JapanKR 5%South KoreaIN 1%India

Italy
Spain
Malaysia
Ukraine

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Emd Holding

Why It Matters

Sectors

Energy

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Semiconductor and photovoltaic agent in Industrial Gas ManufacturingUse—non-incorporative activities

Chemical Identity

CAS685-63-2

PubChem CIDNot recorded

DTXSIDDTXSID4060991

FormulaC4F6

Mol. Weight162.034 g/mol

SMILESFC(F)=C(F)C(F)=C(F)F

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Hexafluorobutadiene (CAS 685-63-2) https://chemicalindependence.com/chemical/685-63-2/ EPA TSCA Inventory: CAS 685-63-2. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 685-63-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 685-63-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290359 for CAS 685-63-2. Reporting year: 2024. https://usatrade.census.gov/