Hydrogenated Styrene/Butadiene Copolymer

INCI: HYDROGENATED STYRENE/BUTADIENE COPOLYMER

CAS Number
66070-58-4
Function
Film former, viscosity controlling
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” CIR assessed safe (2014); no CFR restrictions

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Residual monomers (styrene, 1,3-butadiene) must be controlled as both are IARC carcinogens; however, CIR concluded residual levels in finished cosmetics would be substantially below concern.

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Concern Level: Low

Regulatory Flags

ifra_fragrance

Frequently Asked Questions

Is Hydrogenated Styrene/Butadiene Copolymer safe in cosmetics?

Residual monomers (styrene, 1,3-butadiene) must be controlled as both are IARC carcinogens; however, CIR concluded residual levels in finished cosmetics would be substantially below concern. The EU classifies Hydrogenated Styrene/Butadiene Copolymer as "permitted". Safety rating: EXCELLENT.

Is Hydrogenated Styrene/Butadiene Copolymer allowed in the EU?

Hydrogenated Styrene/Butadiene Copolymer EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Hydrogenated Styrene/Butadiene Copolymer do in cosmetics?

Hydrogenated Styrene/Butadiene Copolymer functions as: Film former, viscosity controlling. It is classified as a cosmetic ingredient in our database. CAS number: 66070-58-4.

What is the Margin of Safety for Hydrogenated Styrene/Butadiene Copolymer?

adequate 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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