Ethyl Perfluorobutyl Ether

INCI: ETHYL PERFLUOROBUTYL ETHER

CAS Number
163702-05-4
Function
Solvent
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Currently permitted โ€” EPA PFAS regulations evolving; no specific CFR cosmetic prohibition yet

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
negligible
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Per- and polyfluoroalkyl substance (PFAS) with extreme environmental persistence; GHS hazards include flammability (Flam. Liq. 2), skin and eye irritation, and aquatic chronic toxicity Category 4; impending EU-wide PFAS ban indicates this is a sunset ingredient.

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Concern Level: High

Frequently Asked Questions

Is Ethyl Perfluorobutyl Ether safe in cosmetics?

Per- and polyfluoroalkyl substance (PFAS) with extreme environmental persistence; GHS hazards include flammability (Flam. Liq. 2), skin and eye irritation, and aquatic chronic toxicity Category 4; impending EU-wide PFAS ban indicates this is a sunset ingredient. The EU classifies Ethyl Perfluorobutyl Ether as "permitted". Safety rating: MODERATE.

Is Ethyl Perfluorobutyl Ether allowed in the EU?

Ethyl Perfluorobutyl Ether EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Ethyl Perfluorobutyl Ether do in cosmetics?

Ethyl Perfluorobutyl Ether functions as: Solvent. It is classified as a cosmetic ingredient in our database. CAS number: 163702-05-4.

What is the Margin of Safety for Ethyl Perfluorobutyl Ether?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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