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What Is Ethyl Perfluorobutyl Ether?

2026-06-11

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Ethyl Perfluorobutyl Ether is a fluorinated organic compound—a transparent, colorless, low-odor fluid (CAS 163702-06-5)—designed to replace ozone-depleting substances (ODSs), compounds with high global warming potential (GWP), and fluorinated materials. It has a higher boiling point than most chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs), thereby reducing evaporation losses. Ethyl perfluorobutyl ether offers both moderate solubility and good material compatibility, making it suitable for use as a cleaning solvent or refrigerant.

Ethyl Perfluorobutyl Ether Properties:

Appearance

Colorless to Almost colorless clear

Melting point

-138°C

Boiling point

49.5±40.0 °C (Predicted)

Density

1.441±0.06 g/cm³ (Predicted)

vapor pressure

14,532.1 Pa [25°C]

Odor

Faint Odor

Signal word 

Warning

Hazard statements 

H319-H413

What is Ethyl Perfluorobutyl Ether Used For?

Ethyl perfluorobutyl ether (163702-06-5) is a fluorinated organic solvent with a wide range of industrial applications. It is also used as a functional fluid in closed systems, such as heat transfer and hydraulic systems.

Is Ethyl Perfluorobutyl Ether Harmful to Skin?

Ethyl perfluorobutyl ether is commonly found in cosmetics and skincare products, primarily serving as a film-forming agent or solvent. At typical concentrations, this ingredient has low direct toxicity to the skin; however, it may cause irritation or allergic reactions due to individual differences or improper use.

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