Octafluorocyclopentene

CAS 559-40-0

Cyclopentene, 1,2,3,3,4,4,5,5-octafluoro-

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$14M

Top sourceChina 49%

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 290389 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 290389, which covers 21 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 49%ChinaGB 13%United KingdomJP 13%JapanIT 11%ItalyIN 11%India

Germany
Russia

EPA-registered importers (2)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Merck Kgaa · DE Germany

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

Vendor Pricing

$27.03/gFluorochem UK

CountryUnited Kingdom

Pack$270.27 / 10 g

Purity98%

Vendors2 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

1 more vendor

Vendor	Country	$/g	Pack	Purity
AstaTech, Inc	United States	$66.80	5 g	97%

Chemical Identity

CAS559-40-0

PubChem CIDNot recorded

DTXSIDDTXSID7073193

FormulaC5F8

Mol. Weight212.042 g/mol

SMILESFC1=C(F)C(F)(F)C(F)(F)C1(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

Octafluorocyclopentene (CAS 559-40-0) https://chemicalindependence.com/chemical/559-40-0/ EPA TSCA Inventory: CAS 559-40-0. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 559-40-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 559-40-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290389 for CAS 559-40-0. Reporting year: 2024. https://usatrade.census.gov/