Butene/Isobutene Copolymer

INCI: BUTENE/ISOBUTENE COPOLYMER

CAS Number
Not assigned (polymer — no unique CAS)
Function
Binding, Humectant, Viscosity Controlling
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes Adequate (supported by CIR polyene group assessment)

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Permitted for cosmetic use with negligible absorption; residual monomer levels should be controlled per GMP.

⚠️
Concern Level: Moderate

Frequently Asked Questions

Is Butene/Isobutene Copolymer safe in cosmetics?

Permitted for cosmetic use with negligible absorption; residual monomer levels should be controlled per GMP. The EU classifies Butene/Isobutene Copolymer as "permitted". Safety rating: GOOD.

Is Butene/Isobutene Copolymer allowed in the EU?

Butene/Isobutene Copolymer EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Butene/Isobutene Copolymer do in cosmetics?

Butene/Isobutene Copolymer functions as: Binding, Humectant, Viscosity Controlling. It is classified as a cosmetic ingredient in our database. CAS number: Not assigned (polymer — no unique CAS).

What is the Margin of Safety for Butene/Isobutene Copolymer?

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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